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\n  \n 2024\n \n \n (3)\n \n \n
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\n \n\n \n \n \n \n \n \n Meridional migrations of the Intertropical Convergence Zone during the Last Deglaciation in the Timor Sea detected by extensive radiocarbon dating.\n \n \n \n \n\n\n \n Nemoto, K.; Yokoyama, Y.; Horiike, S.; Obrochta, S. P.; and Miyairi, Y.\n\n\n \n\n\n\n Radiocarbon,1–10. February 2024.\n \n\n\n\n
\n\n\n\n \n \n \"MeridionalPaper\n  \n \n\n \n \n doi\n  \n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n \n \n \n \n \n \n\n\n\n
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@article{nemoto_meridional_2024,\n\ttitle = {Meridional migrations of the {Intertropical} {Convergence} {Zone} during the {Last} {Deglaciation} in the {Timor} {Sea} detected by extensive radiocarbon dating},\n\tissn = {0033-8222, 1945-5755},\n\turl = {https://www.cambridge.org/core/journals/radiocarbon/article/meridional-migrations-of-the-intertropical-convergence-zone-during-the-last-deglaciation-in-the-timor-sea-detected-by-extensive-radiocarbon-dating/774B6FC533F85363167B60D10F1176AF},\n\tdoi = {10.1017/RDC.2024.13},\n\tabstract = {At the Intertropical Convergence Zone (ITCZ), the northern and southern Tradewinds converge, and this region is characterized by low atmospheric pressure and high precipitation. The climate in the Timor Sea is characterized by seasonal precipitation changes driven by meridional migrations of the ITCZ and the monsoonal front. The ITCZ shifts in response to changes in the thermal balance between the northern and southern hemispheres. Thus, reconstruction of paleo-precipitation in the Timor Sea is expected to reveal past changes in both regional and global climate, the latter through inference of the ITCZ position. To reconstruct paleo-precipitation in the Timor Sea, we performed extensive radiocarbon analysis on both planktonic foraminifera and total organic carbon (TOC), which is derived from terrestrial and marine sources. Increased precipitation enhances the fraction of relatively old, terrestrial carbon to the core site, which in turn increases the difference between the ages of TOC and planktonic foraminifera. Variations in radiocarbon ages reveal that during northern hemisphere cooling intervals such as Heinrich Stadial 1 and the Younger Dryas, the ITCZ was in a southern position, thus increasing precipitation in the Timor Sea. However, the Timor Sea was dryer during the Bølling–Allerød warming as the ITCZ shifted northward.},\n\tlanguage = {en},\n\turldate = {2024-03-05},\n\tjournal = {Radiocarbon},\n\tauthor = {Nemoto, Karin and Yokoyama, Yusuke and Horiike, Satoshi and Obrochta, Stephen P. and Miyairi, Yosuke},\n\tmonth = feb,\n\tyear = {2024},\n\tkeywords = {Intertropical Convergence Zone, deglaciation, radiocarbon AMS dating},\n\tpages = {1--10},\n}\n\n
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\n At the Intertropical Convergence Zone (ITCZ), the northern and southern Tradewinds converge, and this region is characterized by low atmospheric pressure and high precipitation. The climate in the Timor Sea is characterized by seasonal precipitation changes driven by meridional migrations of the ITCZ and the monsoonal front. The ITCZ shifts in response to changes in the thermal balance between the northern and southern hemispheres. Thus, reconstruction of paleo-precipitation in the Timor Sea is expected to reveal past changes in both regional and global climate, the latter through inference of the ITCZ position. To reconstruct paleo-precipitation in the Timor Sea, we performed extensive radiocarbon analysis on both planktonic foraminifera and total organic carbon (TOC), which is derived from terrestrial and marine sources. Increased precipitation enhances the fraction of relatively old, terrestrial carbon to the core site, which in turn increases the difference between the ages of TOC and planktonic foraminifera. Variations in radiocarbon ages reveal that during northern hemisphere cooling intervals such as Heinrich Stadial 1 and the Younger Dryas, the ITCZ was in a southern position, thus increasing precipitation in the Timor Sea. However, the Timor Sea was dryer during the Bølling–Allerød warming as the ITCZ shifted northward.\n
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\n \n\n \n \n \n \n \n \n Influence of Foraminifera Count Size and Rare Species on Transfer Function Results Used in Sea-Level Reconstructions.\n \n \n \n \n\n\n \n Walker, J. S.; and Cahill, N.\n\n\n \n\n\n\n Journal of Foraminiferal Research, 54(2): 107–116. April 2024.\n \n\n\n\n
\n\n\n\n \n \n \"InfluencePaper\n  \n \n\n \n \n doi\n  \n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{walker_influence_2024,\n\ttitle = {Influence of {Foraminifera} {Count} {Size} and {Rare} {Species} on {Transfer} {Function} {Results} {Used} in {Sea}-{Level} {Reconstructions}},\n\tvolume = {54},\n\tissn = {0096-1191},\n\turl = {https://doi.org/10.61551/gsjfr.54.2.107},\n\tdoi = {10.61551/gsjfr.54.2.107},\n\tabstract = {Salt-marsh foraminifera have been instrumental in the production of quantitative high-resolution Holocene relative sea-level reconstructions using both traditional and Bayesian transfer function approaches. To produce the most accurate and precise elevation estimates using a transfer function, the influence of the particular input data must be understood. Here, we used a foraminifera dataset from New Jersey to examine how count size and rare species affect elevation estimates generated by a Bayesian transfer function. We found that increasing count size can reduce elevation estimate uncertainties, but increasing or decreasing total counts does not have a consistent influence on the estimates themselves. Further, the inclusion or exclusion of rare species do not have consistent trends; however, the results vary by location, highlighting the significance of unique foraminiferal assemblages. Finally, we found that count sizes of 60–80 tests minimizes elevation estimate uncertainties and any greater counts will not contribute to further reduced uncertainties.},\n\tnumber = {2},\n\turldate = {2024-04-18},\n\tjournal = {Journal of Foraminiferal Research},\n\tauthor = {Walker, Jennifer S. and Cahill, Niamh},\n\tmonth = apr,\n\tyear = {2024},\n\tpages = {107--116},\n}\n\n
\n
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\n Salt-marsh foraminifera have been instrumental in the production of quantitative high-resolution Holocene relative sea-level reconstructions using both traditional and Bayesian transfer function approaches. To produce the most accurate and precise elevation estimates using a transfer function, the influence of the particular input data must be understood. Here, we used a foraminifera dataset from New Jersey to examine how count size and rare species affect elevation estimates generated by a Bayesian transfer function. We found that increasing count size can reduce elevation estimate uncertainties, but increasing or decreasing total counts does not have a consistent influence on the estimates themselves. Further, the inclusion or exclusion of rare species do not have consistent trends; however, the results vary by location, highlighting the significance of unique foraminiferal assemblages. Finally, we found that count sizes of 60–80 tests minimizes elevation estimate uncertainties and any greater counts will not contribute to further reduced uncertainties.\n
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\n \n\n \n \n \n \n \n \n Taraxerol abundance as a proxy for in situ Mangrove sediment.\n \n \n \n \n\n\n \n Sefton, J. P.; Kemp, A. C.; Vane, C. H.; Kim, A. W.; Bernhardt, C. E.; Johnson, J.; and Engelhart, S. E.\n\n\n \n\n\n\n Organic Geochemistry,104767. March 2024.\n \n\n\n\n
\n\n\n\n \n \n \"TaraxerolPaper\n  \n \n\n \n \n doi\n  \n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n\n\n\n
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@article{sefton_taraxerol_2024,\n\ttitle = {Taraxerol abundance as a proxy for in situ {Mangrove} sediment},\n\tissn = {0146-6380},\n\turl = {https://www.sciencedirect.com/science/article/pii/S0146638024000329},\n\tdoi = {10.1016/j.orggeochem.2024.104767},\n\tabstract = {Mangrove sediments are valuable archives of relative sea-level change if they can be distinguished in the stratigraphic record from other organic-rich depositional environments (e.g., freshwater swamps). Proxies for establishing environment of deposition can be poorly preserved (e.g., foraminifera) in mangrove sediment. Consequently, differentiating mangrove and freshwater sediment in the stratigraphic record is often subjective. We explore if biomarkers can objectively identify mangrove sediment with emphasis on their utility for reconstructing relative sea level. Our approach is specific to identifying in situ sediment, which has received less attention than identifying allochthonous mangrove organic matter. To characterize mangrove and non-mangrove (freshwater) environments, we measured n-alkane, sterol, and triterpenoid abundances in surface sediments at three sites in the Federated States of Micronesia. Elevated taraxerol abundance is diagnostic of sediment accumulating in mangroves and taraxerol is particularly abundant beneath monospecific stands of Rhizophora spp. Taraxerol was undetectable in freshwater sediment. Other triterpenoids are more abundant in mangrove sediment than in freshwater sediment. Using cores from Micronesian mangroves, we examine if biomarkers in sediments are indicative of in situ deposition in a mangrove, and have utility as a relative sea-level proxy. Taraxerol concentrations in cores are comparable to surface mangrove sediments, which indicates deposition in a mangrove. This interpretation is supported by pollen assemblages. Downcore taraxerol variability may reflect changing inputs from Rhizophora spp. rather than diagenesis. We propose that taraxerol is a proxy that differentiates between organic sediment that accumulated in mangrove vs. freshwater environments, lending it utility for reconstructing relative sea level.},\n\turldate = {2024-03-18},\n\tjournal = {Organic Geochemistry},\n\tauthor = {Sefton, J. P. and Kemp, A. C. and Vane, C. H. and Kim, A. W. and Bernhardt, C. E. and Johnson, J. and Engelhart, S. E.},\n\tmonth = mar,\n\tyear = {2024},\n\tkeywords = {-alkane, Kosrae, Micronesia, Paleoenvironment, Pohnpei, Sea level},\n\tpages = {104767},\n}\n\n
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\n Mangrove sediments are valuable archives of relative sea-level change if they can be distinguished in the stratigraphic record from other organic-rich depositional environments (e.g., freshwater swamps). Proxies for establishing environment of deposition can be poorly preserved (e.g., foraminifera) in mangrove sediment. Consequently, differentiating mangrove and freshwater sediment in the stratigraphic record is often subjective. We explore if biomarkers can objectively identify mangrove sediment with emphasis on their utility for reconstructing relative sea level. Our approach is specific to identifying in situ sediment, which has received less attention than identifying allochthonous mangrove organic matter. To characterize mangrove and non-mangrove (freshwater) environments, we measured n-alkane, sterol, and triterpenoid abundances in surface sediments at three sites in the Federated States of Micronesia. Elevated taraxerol abundance is diagnostic of sediment accumulating in mangroves and taraxerol is particularly abundant beneath monospecific stands of Rhizophora spp. Taraxerol was undetectable in freshwater sediment. Other triterpenoids are more abundant in mangrove sediment than in freshwater sediment. Using cores from Micronesian mangroves, we examine if biomarkers in sediments are indicative of in situ deposition in a mangrove, and have utility as a relative sea-level proxy. Taraxerol concentrations in cores are comparable to surface mangrove sediments, which indicates deposition in a mangrove. This interpretation is supported by pollen assemblages. Downcore taraxerol variability may reflect changing inputs from Rhizophora spp. rather than diagenesis. We propose that taraxerol is a proxy that differentiates between organic sediment that accumulated in mangrove vs. freshwater environments, lending it utility for reconstructing relative sea level.\n
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\n  \n 2023\n \n \n (18)\n \n \n
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\n \n\n \n \n \n \n \n \n Paleo sea-level indicators and proxies from Greenland in the GAPSLIP database and comparison with modelled sea level from the PaleoMIST ice-sheet reconstruction.\n \n \n \n \n\n\n \n Gowan, E. J.\n\n\n \n\n\n\n GEUS Bulletin, 53. November 2023.\n \n\n\n\n
\n\n\n\n \n \n \"PaleoPaper\n  \n \n\n \n \n doi\n  \n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n \n \n \n \n \n \n \n \n \n \n\n\n\n
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@article{gowan_paleo_2023,\n\ttitle = {Paleo sea-level indicators and proxies from {Greenland} in the {GAPSLIP} database and comparison with modelled sea level from the {PaleoMIST} ice-sheet reconstruction},\n\tvolume = {53},\n\tissn = {2597-2154},\n\turl = {https://geusbulletin.org/index.php/geusb/article/view/8355},\n\tdoi = {10.34194/geusb.v53.8355},\n\tabstract = {One of the most common ways to assess ice-sheet reconstructions of the past is to evaluate how they impact changes in sea level through glacial isostatic adjustment. PaleoMIST 1.0, a preliminary reconstruction of topography and ice sheets during the past 80 000 years, was created without a rigorous comparison with past sea-level indicators and proxies in Greenland. The basal shear stress values for the Greenland ice sheet were deduced from the present day ice-sheet configuration, which were used for the entire 80 000 years without modification. The margin chronology was based on previous reconstructions and interpolation between them. As a result, it was not known if the Greenland component was representative of its ice-sheet history. In this study, I compile sea–level proxy data into the Global Archive of Paleo Sea Level Indicators and Proxies (GAPSLIP) database and use them to evaluate the PaleoMIST 1.0 reconstruction. The Last Glacial Maximum (c.20 000 years before present) contribution to sea level in PaleoMIST 1.0 is about 3.5 m, intermediate of other reconstructions of the Greenland ice sheet. The results of the data-model comparison show that PaleoMIST requires a larger pre-Holocene ice volume than it currently has to match the sea-level highstands observed around Greenland, especially in southern Greenland. Some of this mismatch is likely because of the crude 2500 year time step used in the margin reconstruction and the limited Last Glacial Maximum extent. Much of the mismatch can also be mitigated if different Earth model structures, particularly a thinner lithosphere, are assumed. Additional ice in Greenland would contribute to increasing the 3–5 m mismatch between the modelled far-field sea level at the Last Glacial Maximum and proxies in PaleoMIST 1.0.},\n\tlanguage = {en},\n\turldate = {2024-01-29},\n\tjournal = {GEUS Bulletin},\n\tauthor = {Gowan, Evan J.},\n\tmonth = nov,\n\tyear = {2023},\n\tkeywords = {Glacial isostatic adjustment, Holocene, Ice sheets, Model-data comparison, Sea level},\n}\n\n
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\n One of the most common ways to assess ice-sheet reconstructions of the past is to evaluate how they impact changes in sea level through glacial isostatic adjustment. PaleoMIST 1.0, a preliminary reconstruction of topography and ice sheets during the past 80 000 years, was created without a rigorous comparison with past sea-level indicators and proxies in Greenland. The basal shear stress values for the Greenland ice sheet were deduced from the present day ice-sheet configuration, which were used for the entire 80 000 years without modification. The margin chronology was based on previous reconstructions and interpolation between them. As a result, it was not known if the Greenland component was representative of its ice-sheet history. In this study, I compile sea–level proxy data into the Global Archive of Paleo Sea Level Indicators and Proxies (GAPSLIP) database and use them to evaluate the PaleoMIST 1.0 reconstruction. The Last Glacial Maximum (c.20 000 years before present) contribution to sea level in PaleoMIST 1.0 is about 3.5 m, intermediate of other reconstructions of the Greenland ice sheet. The results of the data-model comparison show that PaleoMIST requires a larger pre-Holocene ice volume than it currently has to match the sea-level highstands observed around Greenland, especially in southern Greenland. Some of this mismatch is likely because of the crude 2500 year time step used in the margin reconstruction and the limited Last Glacial Maximum extent. Much of the mismatch can also be mitigated if different Earth model structures, particularly a thinner lithosphere, are assumed. Additional ice in Greenland would contribute to increasing the 3–5 m mismatch between the modelled far-field sea level at the Last Glacial Maximum and proxies in PaleoMIST 1.0.\n
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\n \n\n \n \n \n \n \n \n Resolving Uncertainties in Foraminifera-Based Relative Sea-Level Reconstruction: a Case Study from Southern New Zealand.\n \n \n \n \n\n\n \n Garrett, E.; Brain, M. J.; Hayward, B. W.; Newnham, R.; Morey, C. J.; and Gehrels, W.\n\n\n \n\n\n\n Journal of Foraminiferal Research, 53(1): 78–89. January 2023.\n \n\n\n\n
\n\n\n\n \n \n \"ResolvingPaper\n  \n \n\n \n \n doi\n  \n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{garrett_resolving_2023,\n\ttitle = {Resolving {Uncertainties} in {Foraminifera}-{Based} {Relative} {Sea}-{Level} {Reconstruction}: a {Case} {Study} from {Southern} {New} {Zealand}},\n\tvolume = {53},\n\tissn = {0096-1191},\n\tshorttitle = {Resolving {Uncertainties} in {Foraminifera}-{Based} {Relative} {Sea}-{Level} {Reconstruction}},\n\turl = {https://doi.org/10.2113/gsjfr.53.1.78},\n\tdoi = {10.2113/gsjfr.53.1.78},\n\tabstract = {Since the pioneering work of David Scott and others in the 1970s and 1980s, foraminifera have been used to develop precise sea-level reconstructions from salt marshes around the world. In New Zealand, reconstructions feature rapid rates of sea-level rise during the early to mid-20th century. Here, we test whether infaunality, taphonomy, and sediment compaction influence these reconstructions. We find that surface (0–1 cm) and subsurface (3–4 cm) foraminiferal assemblages show a high degree of similarity. A landward shift in assemblage zones is consistent with recent sea-level rise and transgression. Changes associated with infaunality and taphonomy do not affect transfer function-based sea-level reconstructions. Applying a geotechnical modelling approach to the core from which sea-level changes were reconstructed, we demonstrate compaction is also negligible, resulting in maximum post-depositional lowering of 2.5 mm. We conclude that salt-marsh foraminifera are indeed highly accurate and precise indicators of past sea levels.},\n\tnumber = {1},\n\turldate = {2024-01-29},\n\tjournal = {Journal of Foraminiferal Research},\n\tauthor = {Garrett, Ed and Brain, Matthew J. and Hayward, Bruce W. and Newnham, Rewi and Morey, Craig J. and Gehrels, W. Roland},\n\tmonth = jan,\n\tyear = {2023},\n\tpages = {78--89},\n}\n\n
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\n Since the pioneering work of David Scott and others in the 1970s and 1980s, foraminifera have been used to develop precise sea-level reconstructions from salt marshes around the world. In New Zealand, reconstructions feature rapid rates of sea-level rise during the early to mid-20th century. Here, we test whether infaunality, taphonomy, and sediment compaction influence these reconstructions. We find that surface (0–1 cm) and subsurface (3–4 cm) foraminiferal assemblages show a high degree of similarity. A landward shift in assemblage zones is consistent with recent sea-level rise and transgression. Changes associated with infaunality and taphonomy do not affect transfer function-based sea-level reconstructions. Applying a geotechnical modelling approach to the core from which sea-level changes were reconstructed, we demonstrate compaction is also negligible, resulting in maximum post-depositional lowering of 2.5 mm. We conclude that salt-marsh foraminifera are indeed highly accurate and precise indicators of past sea levels.\n
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\n \n\n \n \n \n \n \n \n Quantifying the uncertainty in the Eurasian ice-sheet geometry at the Penultimate Glacial Maximum (Marine Isotope Stage 6).\n \n \n \n \n\n\n \n Pollard, O. G.; Barlow, N. L. M.; Gregoire, L. J.; Gomez, N.; Cartelle, V.; Ely, J. C.; and Astfalck, L. C.\n\n\n \n\n\n\n The Cryosphere, 17(11): 4751–4777. November 2023.\n Publisher: Copernicus GmbH\n\n\n\n
\n\n\n\n \n \n \"QuantifyingPaper\n  \n \n\n \n \n doi\n  \n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{pollard_quantifying_2023,\n\ttitle = {Quantifying the uncertainty in the {Eurasian} ice-sheet geometry at the {Penultimate} {Glacial} {Maximum} ({Marine} {Isotope} {Stage} 6)},\n\tvolume = {17},\n\tissn = {1994-0416},\n\turl = {https://tc.copernicus.org/articles/17/4751/2023/},\n\tdoi = {10.5194/tc-17-4751-2023},\n\tabstract = {The North Sea Last Interglacial sea level is sensitive to the fingerprint of mass loss from polar ice sheets. However, the signal is complicated by the influence of glacial isostatic adjustment driven by Penultimate Glacial Period ice-sheet changes, and yet these ice-sheet geometries remain significantly uncertain. Here, we produce new reconstructions of the Eurasian ice sheet during the Penultimate Glacial Maximum (PGM) by employing large ensemble experiments from a simple ice-sheet model that depends solely on basal shear stress, ice extent, and topography. To explore the range of uncertainty in possible ice geometries, we use a parameterised shear-stress map as input that has been developed to incorporate bedrock characteristics and the influence of ice-sheet basal processes. We perform Bayesian uncertainty quantification, utilising Gaussian process emulation, to calibrate against global ice-sheet reconstructions of the Last Deglaciation and rule out combinations of input parameters that produce unrealistic ice sheets. The refined parameter space is then applied to the PGM to create an ensemble of constrained 3D Eurasian ice-sheet geometries. Our reconstructed PGM Eurasian ice-sheet volume is 48±8 m sea-level equivalent (SLE). We find that the Barents–Kara Sea region displays both the largest mean volume and volume uncertainty of 24±8 m SLE while the British–Irish sector volume of 1.7±0.2 m SLE is the smallest. Our new workflow may be applied to other locations and periods where ice-sheet histories have limited empirical data.},\n\tlanguage = {English},\n\tnumber = {11},\n\turldate = {2024-01-29},\n\tjournal = {The Cryosphere},\n\tauthor = {Pollard, Oliver G. and Barlow, Natasha L. M. and Gregoire, Lauren J. and Gomez, Natalya and Cartelle, Víctor and Ely, Jeremy C. and Astfalck, Lachlan C.},\n\tmonth = nov,\n\tyear = {2023},\n\tnote = {Publisher: Copernicus GmbH},\n\tpages = {4751--4777},\n}\n\n
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\n The North Sea Last Interglacial sea level is sensitive to the fingerprint of mass loss from polar ice sheets. However, the signal is complicated by the influence of glacial isostatic adjustment driven by Penultimate Glacial Period ice-sheet changes, and yet these ice-sheet geometries remain significantly uncertain. Here, we produce new reconstructions of the Eurasian ice sheet during the Penultimate Glacial Maximum (PGM) by employing large ensemble experiments from a simple ice-sheet model that depends solely on basal shear stress, ice extent, and topography. To explore the range of uncertainty in possible ice geometries, we use a parameterised shear-stress map as input that has been developed to incorporate bedrock characteristics and the influence of ice-sheet basal processes. We perform Bayesian uncertainty quantification, utilising Gaussian process emulation, to calibrate against global ice-sheet reconstructions of the Last Deglaciation and rule out combinations of input parameters that produce unrealistic ice sheets. The refined parameter space is then applied to the PGM to create an ensemble of constrained 3D Eurasian ice-sheet geometries. Our reconstructed PGM Eurasian ice-sheet volume is 48±8 m sea-level equivalent (SLE). We find that the Barents–Kara Sea region displays both the largest mean volume and volume uncertainty of 24±8 m SLE while the British–Irish sector volume of 1.7±0.2 m SLE is the smallest. Our new workflow may be applied to other locations and periods where ice-sheet histories have limited empirical data.\n
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\n \n\n \n \n \n \n \n \n Widespread retreat of coastal habitat is likely at warming levels above 1.5 °C.\n \n \n \n \n\n\n \n Saintilan, N.; Horton, B.; Törnqvist, T. E.; Ashe, E. L.; Khan, N. S.; Schuerch, M.; Perry, C.; Kopp, R. E.; Garner, G. G.; Murray, N.; Rogers, K.; Albert, S.; Kelleway, J.; Shaw, T. A.; Woodroffe, C. D.; Lovelock, C. E.; Goddard, M. M.; Hutley, L. B.; Kovalenko, K.; Feher, L.; and Guntenspergen, G.\n\n\n \n\n\n\n Nature, 621(7977): 112–119. September 2023.\n Number: 7977 Publisher: Nature Publishing Group\n\n\n\n
\n\n\n\n \n \n \"WidespreadPaper\n  \n \n\n \n \n doi\n  \n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n \n \n \n \n \n \n\n\n\n
\n
@article{saintilan_widespread_2023,\n\ttitle = {Widespread retreat of coastal habitat is likely at warming levels above 1.5 °{C}},\n\tvolume = {621},\n\tcopyright = {2023 The Author(s)},\n\tissn = {1476-4687},\n\turl = {https://www.nature.com/articles/s41586-023-06448-z},\n\tdoi = {10.1038/s41586-023-06448-z},\n\tabstract = {Several coastal ecosystems—most notably mangroves and tidal marshes—exhibit biogenic feedbacks that are facilitating adjustment to relative sea-level rise (RSLR), including the sequestration of carbon and the trapping of mineral sediment1. The stability of reef-top habitats under RSLR is similarly linked to reef-derived sediment accumulation and the vertical accretion of protective coral reefs2. The persistence of these ecosystems under high rates of RSLR is contested3. Here we show that the probability of vertical adjustment to RSLR inferred from palaeo-stratigraphic observations aligns with contemporary in situ survey measurements. A deficit between tidal marsh and mangrove adjustment and RSLR is likely at 4 mm yr−1 and highly likely at 7 mm yr−1 of RSLR. As rates of RSLR exceed 7 mm yr−1, the probability that reef islands destabilize through increased shoreline erosion and wave over-topping increases. Increased global warming from 1.5 °C to 2.0 °C would double the area of mapped tidal marsh exposed to 4 mm yr−1 of RSLR by between 2080 and 2100. With 3 °C of warming, nearly all the world’s mangrove forests and coral reef islands and almost 40\\% of mapped tidal marshes are estimated to be exposed to RSLR of at least 7 mm yr−1. Meeting the Paris agreement targets would minimize disruption to coastal ecosystems.},\n\tlanguage = {en},\n\tnumber = {7977},\n\turldate = {2024-01-29},\n\tjournal = {Nature},\n\tauthor = {Saintilan, Neil and Horton, Benjamin and Törnqvist, Torbjörn E. and Ashe, Erica L. and Khan, Nicole S. and Schuerch, Mark and Perry, Chris and Kopp, Robert E. and Garner, Gregory G. and Murray, Nicholas and Rogers, Kerrylee and Albert, Simon and Kelleway, Jeffrey and Shaw, Timothy A. and Woodroffe, Colin D. and Lovelock, Catherine E. and Goddard, Madeline M. and Hutley, Lindsay B. and Kovalenko, Katya and Feher, Laura and Guntenspergen, Glenn},\n\tmonth = sep,\n\tyear = {2023},\n\tnote = {Number: 7977\nPublisher: Nature Publishing Group},\n\tkeywords = {Climate-change ecology, Climate-change impacts, Ocean sciences},\n\tpages = {112--119},\n}\n\n
\n
\n\n\n
\n Several coastal ecosystems—most notably mangroves and tidal marshes—exhibit biogenic feedbacks that are facilitating adjustment to relative sea-level rise (RSLR), including the sequestration of carbon and the trapping of mineral sediment1. The stability of reef-top habitats under RSLR is similarly linked to reef-derived sediment accumulation and the vertical accretion of protective coral reefs2. The persistence of these ecosystems under high rates of RSLR is contested3. Here we show that the probability of vertical adjustment to RSLR inferred from palaeo-stratigraphic observations aligns with contemporary in situ survey measurements. A deficit between tidal marsh and mangrove adjustment and RSLR is likely at 4 mm yr−1 and highly likely at 7 mm yr−1 of RSLR. As rates of RSLR exceed 7 mm yr−1, the probability that reef islands destabilize through increased shoreline erosion and wave over-topping increases. Increased global warming from 1.5 °C to 2.0 °C would double the area of mapped tidal marsh exposed to 4 mm yr−1 of RSLR by between 2080 and 2100. With 3 °C of warming, nearly all the world’s mangrove forests and coral reef islands and almost 40% of mapped tidal marshes are estimated to be exposed to RSLR of at least 7 mm yr−1. Meeting the Paris agreement targets would minimize disruption to coastal ecosystems.\n
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\n \n\n \n \n \n \n \n \n A Revised Estimate of Early Pliocene Global Mean Sea Level Using Geodynamic Models of the Patagonian Slab Window.\n \n \n \n \n\n\n \n Hollyday, A.; Austermann, J.; Lloyd, A.; Hoggard, M.; Richards, F.; and Rovere, A.\n\n\n \n\n\n\n Geochemistry, Geophysics, Geosystems, 24(2): e2022GC010648. 2023.\n _eprint: https://onlinelibrary.wiley.com/doi/pdf/10.1029/2022GC010648\n\n\n\n
\n\n\n\n \n \n \"APaper\n  \n \n\n \n \n doi\n  \n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n\n\n\n
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@article{hollyday_revised_2023,\n\ttitle = {A {Revised} {Estimate} of {Early} {Pliocene} {Global} {Mean} {Sea} {Level} {Using} {Geodynamic} {Models} of the {Patagonian} {Slab} {Window}},\n\tvolume = {24},\n\tcopyright = {© 2023. The Authors.},\n\tissn = {1525-2027},\n\turl = {https://onlinelibrary.wiley.com/doi/abs/10.1029/2022GC010648},\n\tdoi = {10.1029/2022GC010648},\n\tabstract = {Paleoshorelines serve as measures of ancient sea level and ice volume but are affected by solid Earth deformation including processes such as glacial isostatic adjustment (GIA) and mantle dynamic topography (DT). The early Pliocene Epoch is an important target for sea-level reconstructions as it contains information about the stability of ice sheets during a climate warmer than today. Along the southeastern passive margin of Argentina, three paleoshorelines date to early Pliocene times (4.8–5.5 Ma), and their variable present-day elevations (36–180 m) reflect a unique topographic deformation signature. We use a mantle convection model to back-advect present-day buoyancy variations, including those that correspond to the Patagonian slab window. Varying the viscosity and initial tomography-derived mantle buoyancy structures allows us to compute a suite of predictions of DT change that, when compared to GIA-corrected shoreline elevations, makes it possible to identify both the most likely convection parameters and the most likely DT change. Our simulations illuminate an interplay of upwelling asthenosphere through the Patagonian slab window and coincident downwelling of the subducted Nazca slab in the mantle transition zone. This flow leads to differential upwarping of the southern Patagonian foreland since early Pliocene times, in line with the observations. Using our most likely DT change leads to an estimate of global mean sea level of 17.5 ± 6.4 m (1σ) in the early Pliocene Epoch. This confirms that sea level was significantly higher than present and can be used to calibrate ice sheet models.},\n\tlanguage = {en},\n\tnumber = {2},\n\turldate = {2024-01-29},\n\tjournal = {Geochemistry, Geophysics, Geosystems},\n\tauthor = {Hollyday, Andrew and Austermann, Jacqueline and Lloyd, Andrew and Hoggard, Mark and Richards, Fred and Rovere, Alessio},\n\tyear = {2023},\n\tnote = {\\_eprint: https://onlinelibrary.wiley.com/doi/pdf/10.1029/2022GC010648},\n\tkeywords = {Patagonia, Pliocene, geodynamics, glacial isostatic adjustment, mantle convection, sea-level change},\n\tpages = {e2022GC010648},\n}\n\n
\n
\n\n\n
\n Paleoshorelines serve as measures of ancient sea level and ice volume but are affected by solid Earth deformation including processes such as glacial isostatic adjustment (GIA) and mantle dynamic topography (DT). The early Pliocene Epoch is an important target for sea-level reconstructions as it contains information about the stability of ice sheets during a climate warmer than today. Along the southeastern passive margin of Argentina, three paleoshorelines date to early Pliocene times (4.8–5.5 Ma), and their variable present-day elevations (36–180 m) reflect a unique topographic deformation signature. We use a mantle convection model to back-advect present-day buoyancy variations, including those that correspond to the Patagonian slab window. Varying the viscosity and initial tomography-derived mantle buoyancy structures allows us to compute a suite of predictions of DT change that, when compared to GIA-corrected shoreline elevations, makes it possible to identify both the most likely convection parameters and the most likely DT change. Our simulations illuminate an interplay of upwelling asthenosphere through the Patagonian slab window and coincident downwelling of the subducted Nazca slab in the mantle transition zone. This flow leads to differential upwarping of the southern Patagonian foreland since early Pliocene times, in line with the observations. Using our most likely DT change leads to an estimate of global mean sea level of 17.5 ± 6.4 m (1σ) in the early Pliocene Epoch. This confirms that sea level was significantly higher than present and can be used to calibrate ice sheet models.\n
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\n \n\n \n \n \n \n \n \n The utility of historical records for hazard analysis in an area of marginal cyclone influence.\n \n \n \n \n\n\n \n Switzer, A. D.; Christensen, J.; Aldridge, J.; Taylor, D.; Churchill, J.; Watson, H.; Fraser, M. W.; and Shaw, J.\n\n\n \n\n\n\n Communications Earth & Environment, 4(1): 1–12. May 2023.\n Number: 1 Publisher: Nature Publishing Group\n\n\n\n
\n\n\n\n \n \n \"ThePaper\n  \n \n\n \n \n doi\n  \n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n \n \n \n \n \n \n \n \n\n\n\n
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@article{switzer_utility_2023,\n\ttitle = {The utility of historical records for hazard analysis in an area of marginal cyclone influence},\n\tvolume = {4},\n\tcopyright = {2023 The Author(s)},\n\tissn = {2662-4435},\n\turl = {https://www.nature.com/articles/s43247-023-00844-z},\n\tdoi = {10.1038/s43247-023-00844-z},\n\tabstract = {Shark Bay Marine Park is a UNESCO World Heritage Property located in a region of marginal tropical cyclone influence. Sustainable management of this unique environment as the climate changes requires a quantified understanding of its vulnerability to natural hazards. Here, we outline a structured analysis of novel historical archive information that has uncovered reports of an extreme storm surge associated with a Tropical Cyclone in 1921 that generated remarkable overland flow which left fish and sharks stranded up to 9.66 km (6 miles) inland. Weighted information from historical archives is placed in a new framework and provide inputs to modelling of this event which improves the understanding of its magnitude and furnishes records of the impacts of what occurred on that day and notably also in the years following. The suite of plausible tracks that reproduce the historical data contextualise the storm as a marginal Category 4 or 5 storm and its return interval as equivalent or slightly greater than the current local planning level for coastal flooding in the region. The outcome underscores the global importance of examining the probable maximum event for risk management in areas of marginal cyclone influence where vulnerable ecosystems or vital regional infrastructure of key economic importance are located, and the need to factor in TC risk in marine conservation and planning in the Shark Bay World Heritage Property.},\n\tlanguage = {en},\n\tnumber = {1},\n\turldate = {2024-01-29},\n\tjournal = {Communications Earth \\& Environment},\n\tauthor = {Switzer, Adam D. and Christensen, Joseph and Aldridge, Joanna and Taylor, David and Churchill, Jim and Watson, Holly and Fraser, Matthew W. and Shaw, Jenny},\n\tmonth = may,\n\tyear = {2023},\n\tnote = {Number: 1\nPublisher: Nature Publishing Group},\n\tkeywords = {Atmospheric dynamics, Geography, Natural hazards, Physical oceanography},\n\tpages = {1--12},\n}\n\n
\n
\n\n\n
\n Shark Bay Marine Park is a UNESCO World Heritage Property located in a region of marginal tropical cyclone influence. Sustainable management of this unique environment as the climate changes requires a quantified understanding of its vulnerability to natural hazards. Here, we outline a structured analysis of novel historical archive information that has uncovered reports of an extreme storm surge associated with a Tropical Cyclone in 1921 that generated remarkable overland flow which left fish and sharks stranded up to 9.66 km (6 miles) inland. Weighted information from historical archives is placed in a new framework and provide inputs to modelling of this event which improves the understanding of its magnitude and furnishes records of the impacts of what occurred on that day and notably also in the years following. The suite of plausible tracks that reproduce the historical data contextualise the storm as a marginal Category 4 or 5 storm and its return interval as equivalent or slightly greater than the current local planning level for coastal flooding in the region. The outcome underscores the global importance of examining the probable maximum event for risk management in areas of marginal cyclone influence where vulnerable ecosystems or vital regional infrastructure of key economic importance are located, and the need to factor in TC risk in marine conservation and planning in the Shark Bay World Heritage Property.\n
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\n \n\n \n \n \n \n \n \n The magnitude and source of meltwater forcing of the 8.2 ka climate event constrained by relative sea-level data from eastern Scotland.\n \n \n \n \n\n\n \n Rush, G.; Garrett, E.; Bateman, M. D.; Bigg, G. R.; Hibbert, F. D.; Smith, D. E.; and Gehrels, W. R.\n\n\n \n\n\n\n Quaternary Science Advances, 12: 100119. October 2023.\n \n\n\n\n
\n\n\n\n \n \n \"ThePaper\n  \n \n\n \n \n doi\n  \n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n \n \n \n \n \n \n \n \n \n \n\n\n\n
\n
@article{rush_magnitude_2023,\n\ttitle = {The magnitude and source of meltwater forcing of the 8.2 ka climate event constrained by relative sea-level data from eastern {Scotland}},\n\tvolume = {12},\n\tissn = {2666-0334},\n\turl = {https://www.sciencedirect.com/science/article/pii/S2666033423000515},\n\tdoi = {10.1016/j.qsa.2023.100119},\n\tabstract = {The 8.2 ka climate event is the most significant North Atlantic cooling event during the Holocene. Freshwater pulses from the melting Laurentide Ice Sheet draining into the North Atlantic Ocean are commonly thought to be its cause by perturbing the Atlantic Meridional Overturning Circulation. The timing, magnitude and number of freshwater pulses, however, remain uncertain. This is problematic for predicting future climate scenarios because it prevents rigorous testing of coupled ocean–atmosphere climate models against an otherwise excellent test case of climate effects of meltwater inputs into the North Atlantic. To address this knowledge gap, we present a high-resolution relative sea-level record from the Ythan Estuary, Scotland, spanning the centuries leading into the 8.2 ka climate event. The results show a ‘sea-level event’ with two distinct stages between 8,530 and 8,240 cal yr BP when rates of sea-level rise departed from the background rates of around 2 mm yr-1 and reached around 13 mm yr-1 and 4 mm yr-1, respectively. The maximum probable magnitude of local sea-level rise during the stages was 1.67 and 0.41 m, which equate to barystatic magnitudes of 2.39 and 0.58 m respectively after considering the geographic location relative to the source. For the first time, we demonstrate that Lake Agassiz-Ojibway drainage alone is insufficient to explain the large volumes of North Atlantic freshwater input, and that the collapse of the Hudson Bay Ice Saddle appears to have been the main source of meltwater in to the North Atlantic. By comparing the Ythan sea-level record with other sources of evidence, we hypothesise that an initial thinning of the Laurentide Ice Sheet enabled subglacial drainage of Lake Agassiz and subsequent collapse of the Hudson Bay Ice Saddle. This was followed by the terminal drainage of Lake Agassiz completing a sequence of events that likely forced the shift in the Atlantic Meridional Overturning Circulation and hence the 8.2 ka climate event.},\n\turldate = {2024-01-29},\n\tjournal = {Quaternary Science Advances},\n\tauthor = {Rush, Graham and Garrett, Ed and Bateman, Mark D. and Bigg, Grant R. and Hibbert, Fiona D. and Smith, David E. and Gehrels, W. Roland},\n\tmonth = oct,\n\tyear = {2023},\n\tkeywords = {8.2 ka climate event, Atlantic meridional overturning circulation (AMOC), Holocene, Laurentide ice sheet, Sea-level change},\n\tpages = {100119},\n}\n\n
\n
\n\n\n
\n The 8.2 ka climate event is the most significant North Atlantic cooling event during the Holocene. Freshwater pulses from the melting Laurentide Ice Sheet draining into the North Atlantic Ocean are commonly thought to be its cause by perturbing the Atlantic Meridional Overturning Circulation. The timing, magnitude and number of freshwater pulses, however, remain uncertain. This is problematic for predicting future climate scenarios because it prevents rigorous testing of coupled ocean–atmosphere climate models against an otherwise excellent test case of climate effects of meltwater inputs into the North Atlantic. To address this knowledge gap, we present a high-resolution relative sea-level record from the Ythan Estuary, Scotland, spanning the centuries leading into the 8.2 ka climate event. The results show a ‘sea-level event’ with two distinct stages between 8,530 and 8,240 cal yr BP when rates of sea-level rise departed from the background rates of around 2 mm yr-1 and reached around 13 mm yr-1 and 4 mm yr-1, respectively. The maximum probable magnitude of local sea-level rise during the stages was 1.67 and 0.41 m, which equate to barystatic magnitudes of 2.39 and 0.58 m respectively after considering the geographic location relative to the source. For the first time, we demonstrate that Lake Agassiz-Ojibway drainage alone is insufficient to explain the large volumes of North Atlantic freshwater input, and that the collapse of the Hudson Bay Ice Saddle appears to have been the main source of meltwater in to the North Atlantic. By comparing the Ythan sea-level record with other sources of evidence, we hypothesise that an initial thinning of the Laurentide Ice Sheet enabled subglacial drainage of Lake Agassiz and subsequent collapse of the Hudson Bay Ice Saddle. This was followed by the terminal drainage of Lake Agassiz completing a sequence of events that likely forced the shift in the Atlantic Meridional Overturning Circulation and hence the 8.2 ka climate event.\n
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\n \n\n \n \n \n \n \n \n Deglacial perspectives of future sea level for Singapore.\n \n \n \n \n\n\n \n Shaw, T. A.; Li, T.; Ng, T.; Cahill, N.; Chua, S.; Majewski, J. M.; Nathan, Y.; Garner, G. G.; Kopp, R. E.; Hanebuth, T. J. J.; Switzer, A. D.; and Horton, B. P.\n\n\n \n\n\n\n Communications Earth & Environment, 4(1): 1–12. June 2023.\n Number: 1 Publisher: Nature Publishing Group\n\n\n\n
\n\n\n\n \n \n \"DeglacialPaper\n  \n \n\n \n \n doi\n  \n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n \n \n \n \n \n \n \n \n\n\n\n
\n
@article{shaw_deglacial_2023,\n\ttitle = {Deglacial perspectives of future sea level for {Singapore}},\n\tvolume = {4},\n\tcopyright = {2023 The Author(s)},\n\tissn = {2662-4435},\n\turl = {https://www.nature.com/articles/s43247-023-00868-5},\n\tdoi = {10.1038/s43247-023-00868-5},\n\tabstract = {Low elevation equatorial and tropical coastal regions are highly vulnerable to sea level rise. Here we provide probability perspectives of future sea level for Singapore using regional geological reconstructions and instrumental records since the last glacial maximum {\\textasciitilde}21.5 thousand years ago. We quantify magnitudes and rates of sea-level change showing deglacial sea level rose from {\\textasciitilde}121 m below present level and increased at averaged rates up to {\\textasciitilde}15 mm/yr, which reduced the paleogeographic landscape by {\\textasciitilde}2.3 million km2. Projections under a moderate emissions scenario show sea level rising 0.95 m at a rate of 7.3 mm/yr by 2150 which has only been exceeded (at least 99\\% probability) during rapid ice mass loss events {\\textasciitilde}14.5 and {\\textasciitilde}9 thousand years ago. Projections under a high emissions scenario incorporating low confidence ice-sheet processes, however, have no precedent during the last deglaciation.},\n\tlanguage = {en},\n\tnumber = {1},\n\turldate = {2024-01-29},\n\tjournal = {Communications Earth \\& Environment},\n\tauthor = {Shaw, Timothy A. and Li, Tanghua and Ng, Trina and Cahill, Niamh and Chua, Stephen and Majewski, Jedrzej M. and Nathan, Yudhishthra and Garner, Gregory G. and Kopp, Robert E. and Hanebuth, Till J. J. and Switzer, Adam D. and Horton, Benjamin P.},\n\tmonth = jun,\n\tyear = {2023},\n\tnote = {Number: 1\nPublisher: Nature Publishing Group},\n\tkeywords = {Ocean sciences, Palaeoceanography, Physical oceanography, Projection and prediction},\n\tpages = {1--12},\n}\n\n
\n
\n\n\n
\n Low elevation equatorial and tropical coastal regions are highly vulnerable to sea level rise. Here we provide probability perspectives of future sea level for Singapore using regional geological reconstructions and instrumental records since the last glacial maximum ~21.5 thousand years ago. We quantify magnitudes and rates of sea-level change showing deglacial sea level rose from ~121 m below present level and increased at averaged rates up to ~15 mm/yr, which reduced the paleogeographic landscape by ~2.3 million km2. Projections under a moderate emissions scenario show sea level rising 0.95 m at a rate of 7.3 mm/yr by 2150 which has only been exceeded (at least 99% probability) during rapid ice mass loss events ~14.5 and ~9 thousand years ago. Projections under a high emissions scenario incorporating low confidence ice-sheet processes, however, have no precedent during the last deglaciation.\n
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\n \n\n \n \n \n \n \n \n Spatial and Temporal Distributions of Live Salt-Marsh Foraminifera in Southern New Jersey: Implications for Sea-Level Studies.\n \n \n \n \n\n\n \n Walker, J. S.; Khan, N. S.; Shaw, T. A.; Barber, D. C.; Switzer, A. D.; and Horton, B. P.\n\n\n \n\n\n\n Journal of Foraminiferal Research, 53(1): 3–19. January 2023.\n \n\n\n\n
\n\n\n\n \n \n \"SpatialPaper\n  \n \n\n \n \n doi\n  \n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{walker_spatial_2023,\n\ttitle = {Spatial and {Temporal} {Distributions} of {Live} {Salt}-{Marsh} {Foraminifera} in {Southern} {New} {Jersey}: {Implications} for {Sea}-{Level} {Studies}},\n\tvolume = {53},\n\tissn = {0096-1191},\n\tshorttitle = {Spatial and {Temporal} {Distributions} of {Live} {Salt}-{Marsh} {Foraminifera} in {Southern} {New} {Jersey}},\n\turl = {https://doi.org/10.2113/gsjfr.53.1.3},\n\tdoi = {10.2113/gsjfr.53.1.3},\n\tabstract = {Geological reconstructions of relative sea-level change have been greatly enhanced by continuous high-resolution records with the use of salt-marsh foraminifera due to their relationship with tidal level in modern environments and subsequent preservation of tests in sediments. A detailed understanding of how live foraminifera assemblages compare to dead or total (live + dead) assemblages and the influence of environmental variables on foraminiferal distributions is essential for their use as a proxy to reconstruct sea level. Here, we evaluated small-scale spatial and temporal (seasonal and interannual) variability of live foraminifera assemblages from four high marsh monitoring stations along a salinity gradient in southern New Jersey over three years. In addition, we measured porewater and sedimentary variables and stable carbon isotopes during each sampling period every three months. In the 184 samples, we identified 11 live agglutinated foraminifera species and four distinct clusters of live foraminifera that correspond to the stations from which they were sampled and to the dead and total assemblages. We found no clear correlation over time between variability in live assemblages and measured environmental variables; however, elevation was the primary controlling factor influencing foraminiferal distributions, with secondary influences from salinity and substrate. The consistency of foraminiferal assemblages on spatial and temporal scales and among live, dead, and total assemblages further reinforces the value of salt-marsh foraminifera as reliable sea-level indicators.},\n\tnumber = {1},\n\turldate = {2024-01-29},\n\tjournal = {Journal of Foraminiferal Research},\n\tauthor = {Walker, Jennifer S. and Khan, Nicole S. and Shaw, Timothy A. and Barber, Donald C. and Switzer, Adam D. and Horton, Benjamin P.},\n\tmonth = jan,\n\tyear = {2023},\n\tpages = {3--19},\n}\n\n
\n
\n\n\n
\n Geological reconstructions of relative sea-level change have been greatly enhanced by continuous high-resolution records with the use of salt-marsh foraminifera due to their relationship with tidal level in modern environments and subsequent preservation of tests in sediments. A detailed understanding of how live foraminifera assemblages compare to dead or total (live + dead) assemblages and the influence of environmental variables on foraminiferal distributions is essential for their use as a proxy to reconstruct sea level. Here, we evaluated small-scale spatial and temporal (seasonal and interannual) variability of live foraminifera assemblages from four high marsh monitoring stations along a salinity gradient in southern New Jersey over three years. In addition, we measured porewater and sedimentary variables and stable carbon isotopes during each sampling period every three months. In the 184 samples, we identified 11 live agglutinated foraminifera species and four distinct clusters of live foraminifera that correspond to the stations from which they were sampled and to the dead and total assemblages. We found no clear correlation over time between variability in live assemblages and measured environmental variables; however, elevation was the primary controlling factor influencing foraminiferal distributions, with secondary influences from salinity and substrate. The consistency of foraminiferal assemblages on spatial and temporal scales and among live, dead, and total assemblages further reinforces the value of salt-marsh foraminifera as reliable sea-level indicators.\n
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\n \n\n \n \n \n \n \n \n Holocene relative sea-level changes in northwest Ireland: An empirical test for glacial isostatic adjustment models.\n \n \n \n \n\n\n \n Kirby, J. R; Garrett, E.; and Gehrels, W R.\n\n\n \n\n\n\n The Holocene, 33(8): 926–938. August 2023.\n Publisher: SAGE Publications Ltd\n\n\n\n
\n\n\n\n \n \n \"HolocenePaper\n  \n \n\n \n \n doi\n  \n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{kirby_holocene_2023,\n\ttitle = {Holocene relative sea-level changes in northwest {Ireland}: {An} empirical test for glacial isostatic adjustment models},\n\tvolume = {33},\n\tissn = {0959-6836},\n\tshorttitle = {Holocene relative sea-level changes in northwest {Ireland}},\n\turl = {https://doi.org/10.1177/09596836231169992},\n\tdoi = {10.1177/09596836231169992},\n\tabstract = {The late-Quaternary relative sea-level (RSL) history of Ireland is complex, positioned at the margins of the former British-Irish Ice Sheet, and subject to the influence of ice unloading and forebulge collapse. Geophysical models of post-glacial isostatic adjustment (GIA) provide estimates of the pattern of RSL change since deglaciation which may be tested and validated with empirical data from proxy records. For the region of northwest Ireland, there is a paucity of high-quality RSL data and, therefore, equivocal evidence to support the GIA models that predict a mid to Late-Holocene RSL highstand of between +0.5 and +2 m above present. This study aims to investigate this model-data discrepancy by reconstructing RSL change from a near continuous salt-marsh sequence at Bracky Bridge, Donegal, spanning the last ca. 2500 years. We develop a transfer function model to reconstruct the vertical position of sea level using a regional diatom training set to quantify the indicative meaning and predict the palaeomarsh elevation of the core samples. A chronology is provided by a combination of 14C and 210Pb data, with sample specific ages derived from an age-depth model using a Bayesian framework. Our reconstruction shows ca. 2 m of relative sea-level rise in the past 2500 years. This is not compatible with some previously published sea-level index points from the region, which we re-interpret as freshwater/terrestrial limiting data. These results do not provide any evidence to support a Mid-Holocene RSL highstand above present sea level. Whilst none of the available GIA models replicate the timing and magnitude of the Late-Holocene RSL rise in our reconstruction, those which incorporate a thick and extensive British-Irish Sea Ice Sheet provide the best fit.},\n\tlanguage = {en},\n\tnumber = {8},\n\turldate = {2024-01-29},\n\tjournal = {The Holocene},\n\tauthor = {Kirby, Jason R and Garrett, Ed and Gehrels, W Roland},\n\tmonth = aug,\n\tyear = {2023},\n\tnote = {Publisher: SAGE Publications Ltd},\n\tpages = {926--938},\n}\n\n
\n
\n\n\n
\n The late-Quaternary relative sea-level (RSL) history of Ireland is complex, positioned at the margins of the former British-Irish Ice Sheet, and subject to the influence of ice unloading and forebulge collapse. Geophysical models of post-glacial isostatic adjustment (GIA) provide estimates of the pattern of RSL change since deglaciation which may be tested and validated with empirical data from proxy records. For the region of northwest Ireland, there is a paucity of high-quality RSL data and, therefore, equivocal evidence to support the GIA models that predict a mid to Late-Holocene RSL highstand of between +0.5 and +2 m above present. This study aims to investigate this model-data discrepancy by reconstructing RSL change from a near continuous salt-marsh sequence at Bracky Bridge, Donegal, spanning the last ca. 2500 years. We develop a transfer function model to reconstruct the vertical position of sea level using a regional diatom training set to quantify the indicative meaning and predict the palaeomarsh elevation of the core samples. A chronology is provided by a combination of 14C and 210Pb data, with sample specific ages derived from an age-depth model using a Bayesian framework. Our reconstruction shows ca. 2 m of relative sea-level rise in the past 2500 years. This is not compatible with some previously published sea-level index points from the region, which we re-interpret as freshwater/terrestrial limiting data. These results do not provide any evidence to support a Mid-Holocene RSL highstand above present sea level. Whilst none of the available GIA models replicate the timing and magnitude of the Late-Holocene RSL rise in our reconstruction, those which incorporate a thick and extensive British-Irish Sea Ice Sheet provide the best fit.\n
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\n \n\n \n \n \n \n \n \n The characteristics and preservation potential of Hurricane Irma's overwash deposit in southern Florida, USA.\n \n \n \n \n\n\n \n Joyse, K. M.; Khan, N. S.; Moyer, R. P.; Radabaugh, K. R.; Hong, I.; Chappel, A. R.; Walker, J. S.; Sanders, C. J.; Engelhart, S. E.; Kopp, R. E.; and Horton, B. P.\n\n\n \n\n\n\n Marine Geology, 461: 107077. July 2023.\n \n\n\n\n
\n\n\n\n \n \n \"ThePaper\n  \n \n\n \n \n doi\n  \n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n\n\n\n
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@article{joyse_characteristics_2023,\n\ttitle = {The characteristics and preservation potential of {Hurricane} {Irma}'s overwash deposit in southern {Florida}, {USA}},\n\tvolume = {461},\n\tissn = {0025-3227},\n\turl = {https://www.sciencedirect.com/science/article/pii/S0025322723000890},\n\tdoi = {10.1016/j.margeo.2023.107077},\n\tabstract = {Overwash deposits from tropical cyclone-induced storm surges are commonly used as modern analogues for paleo-storm studies. However, the evolution of these deposits between their time of deposition and their incorporation into the geologic record is poorly understood. To understand how the characteristics of an overwash deposit can change over time, we analyzed overwash deposits from four mangrove islands in southern Florida two to three months and twenty-two months after Hurricane Irma's landfall in the region on 10 September 2017. We analyzed the stratigraphy, mean grain size, organic and carbonate contents, stable carbon isotopic signatures, and microfossil (foraminifera and diatom) assemblages of pre-Irma and Irma overwash sediments. Hurricane Irma's storm surge deposited light gray carbonate muds and sands up to 11 cm thick over red organic-rich mangrove peats throughout mangrove islands in southern Florida. Stratigraphy, grain size, loss-on-ignition, and foraminifera analyses provided the strongest evidence for differentiating Irma's overwash deposit from underlying mangrove peats and, if preserved, are expected to identify Hurricane Irma's overwash event within the geologic record. Mean grain size showed the overwash deposit (5.0 ± 0.8 ɸ) was coarser than underlying mangrove peats (6.7 ± 0.7 ɸ), and loss-on-ignition showed the overwash deposit had a lower organic content (19.8 ± 9.1\\%) and a higher carbonate content (67.8 ± 20.7\\%) than the underlying peats (59.4 ± 14.6\\% and 33.7 ± 11.0\\%, respectively). The overwash deposit was dominated by a diverse, abundant assemblage of sub-tidal benthic calcareous foraminifera compared to a uniform, sparse assemblage of agglutinated foraminifera in the pre-Irma mangrove peats. Geochemical indicators were not able to provide evidence of an overwash event by differentiating organic δ13C or C/N of the overwash deposit from those of the mangrove peats. The complex relationship between diatoms and local environmental factors prevented diatom assemblages from providing a statistically clear distinction between Irma's overwash sediments and underlying mangrove peats. By visiting Hurricane Irma's overwash deposit immediately following landfall and nearly two years post-storm, we were able to document how the overwash deposit's characteristics changed over time. Continued monitoring on the scale of five to ten years would provide further insights into the preservation of overwash deposits for paleo-storm studies.},\n\turldate = {2024-01-29},\n\tjournal = {Marine Geology},\n\tauthor = {Joyse, Kristen M. and Khan, Nicole S. and Moyer, Ryan P. and Radabaugh, Kara R. and Hong, Isabel and Chappel, Amanda R. and Walker, Jennifer S. and Sanders, Christian J. and Engelhart, Simon E. and Kopp, Robert E. and Horton, Benjamin P.},\n\tmonth = jul,\n\tyear = {2023},\n\tkeywords = {Carbonate, Hurricane, Mangrove, Overwash deposit, Paleotempestology, Storm surge},\n\tpages = {107077},\n}\n\n
\n
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\n Overwash deposits from tropical cyclone-induced storm surges are commonly used as modern analogues for paleo-storm studies. However, the evolution of these deposits between their time of deposition and their incorporation into the geologic record is poorly understood. To understand how the characteristics of an overwash deposit can change over time, we analyzed overwash deposits from four mangrove islands in southern Florida two to three months and twenty-two months after Hurricane Irma's landfall in the region on 10 September 2017. We analyzed the stratigraphy, mean grain size, organic and carbonate contents, stable carbon isotopic signatures, and microfossil (foraminifera and diatom) assemblages of pre-Irma and Irma overwash sediments. Hurricane Irma's storm surge deposited light gray carbonate muds and sands up to 11 cm thick over red organic-rich mangrove peats throughout mangrove islands in southern Florida. Stratigraphy, grain size, loss-on-ignition, and foraminifera analyses provided the strongest evidence for differentiating Irma's overwash deposit from underlying mangrove peats and, if preserved, are expected to identify Hurricane Irma's overwash event within the geologic record. Mean grain size showed the overwash deposit (5.0 ± 0.8 ɸ) was coarser than underlying mangrove peats (6.7 ± 0.7 ɸ), and loss-on-ignition showed the overwash deposit had a lower organic content (19.8 ± 9.1%) and a higher carbonate content (67.8 ± 20.7%) than the underlying peats (59.4 ± 14.6% and 33.7 ± 11.0%, respectively). The overwash deposit was dominated by a diverse, abundant assemblage of sub-tidal benthic calcareous foraminifera compared to a uniform, sparse assemblage of agglutinated foraminifera in the pre-Irma mangrove peats. Geochemical indicators were not able to provide evidence of an overwash event by differentiating organic δ13C or C/N of the overwash deposit from those of the mangrove peats. The complex relationship between diatoms and local environmental factors prevented diatom assemblages from providing a statistically clear distinction between Irma's overwash sediments and underlying mangrove peats. By visiting Hurricane Irma's overwash deposit immediately following landfall and nearly two years post-storm, we were able to document how the overwash deposit's characteristics changed over time. Continued monitoring on the scale of five to ten years would provide further insights into the preservation of overwash deposits for paleo-storm studies.\n
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\n \n\n \n \n \n \n \n \n Missing sea level rise in southeastern Greenland during and since the Little Ice Age.\n \n \n \n \n\n\n \n Woodroffe, S. A.; Wake, L. M.; Kjeldsen, K. K.; Barlow, N. L. M.; Long, A. J.; and Kjær, K. H.\n\n\n \n\n\n\n Climate of the Past, 19(8): 1585–1606. August 2023.\n Publisher: Copernicus GmbH\n\n\n\n
\n\n\n\n \n \n \"MissingPaper\n  \n \n\n \n \n doi\n  \n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{woodroffe_missing_2023,\n\ttitle = {Missing sea level rise in southeastern {Greenland} during and since the {Little} {Ice} {Age}},\n\tvolume = {19},\n\tissn = {1814-9324},\n\turl = {https://cp.copernicus.org/articles/19/1585/2023/},\n\tdoi = {10.5194/cp-19-1585-2023},\n\tabstract = {The Greenland Ice Sheet has been losing mass at an accelerating rate over the past 2 decades. Understanding ice mass and glacier changes during the preceding several hundred years prior to geodetic measurements is more difficult because evidence of past ice extent in many places was later overridden. Salt marshes provide the only continuous records of relative sea level (RSL) from close to the Greenland Ice Sheet that span the period of time during and since the Little Ice Age (LIA) and can be used to reconstruct ice mass gain and loss over recent centuries. Salt marsh sediments collected at the mouth of Dronning Marie Dal, close to the Greenland Ice Sheet margin in southeastern Greenland, record RSL changes over the past ca. 300 years through changing sediment and diatom stratigraphy. These RSL changes record a combination of processes that are dominated by local and regional changes in Greenland Ice Sheet mass balance during this critical period that spans the maximum of the LIA and 20th-century warming. In the early part of the record (1725–1762 CE) the rate of RSL rise is higher than reconstructed from the closest isolation basin at Timmiarmiut, but between 1762 and 1880 CE the RSL rate is within the error range of the rate of RSL change recorded in the isolation basin. RSL begins to slowly fall around 1880 CE, with a total amount of RSL fall of 0.09±0.1 m in the last 140 years. Modelled RSL, which takes into account contributions from post-LIA Greenland Ice Sheet glacio-isostatic adjustment (GIA), ongoing deglacial GIA, the global non-ice sheet glacial melt fingerprint, contributions from thermosteric effects, the Antarctic mass loss sea level fingerprint and terrestrial water storage, overpredicts the amount of RSL fall since the end of the LIA by at least 0.5 m. The GIA signal caused by post-LIA Greenland Ice Sheet mass loss is by far the largest contributor to this modelled RSL, and error in its calculation has a large impact on RSL predictions at Dronning Marie Dal. We cannot reconcile the modelled RSL and the salt marsh observations, even when moving the termination of the LIA to 1700 CE and reducing the post-LIA Greenland mass loss signal by 30 \\%, and a “budget residual” of +∼3 mm yr−1 since the end of the LIA remains unexplained. This new RSL record backs up other studies that suggest that there are significant regional differences in the timing and magnitude of the response of the Greenland Ice Sheet to the climate shift from the LIA into the 20th century.},\n\tlanguage = {English},\n\tnumber = {8},\n\turldate = {2024-01-29},\n\tjournal = {Climate of the Past},\n\tauthor = {Woodroffe, Sarah A. and Wake, Leanne M. and Kjeldsen, Kristian K. and Barlow, Natasha L. M. and Long, Antony J. and Kjær, Kurt H.},\n\tmonth = aug,\n\tyear = {2023},\n\tnote = {Publisher: Copernicus GmbH},\n\tpages = {1585--1606},\n}\n\n
\n
\n\n\n
\n The Greenland Ice Sheet has been losing mass at an accelerating rate over the past 2 decades. Understanding ice mass and glacier changes during the preceding several hundred years prior to geodetic measurements is more difficult because evidence of past ice extent in many places was later overridden. Salt marshes provide the only continuous records of relative sea level (RSL) from close to the Greenland Ice Sheet that span the period of time during and since the Little Ice Age (LIA) and can be used to reconstruct ice mass gain and loss over recent centuries. Salt marsh sediments collected at the mouth of Dronning Marie Dal, close to the Greenland Ice Sheet margin in southeastern Greenland, record RSL changes over the past ca. 300 years through changing sediment and diatom stratigraphy. These RSL changes record a combination of processes that are dominated by local and regional changes in Greenland Ice Sheet mass balance during this critical period that spans the maximum of the LIA and 20th-century warming. In the early part of the record (1725–1762 CE) the rate of RSL rise is higher than reconstructed from the closest isolation basin at Timmiarmiut, but between 1762 and 1880 CE the RSL rate is within the error range of the rate of RSL change recorded in the isolation basin. RSL begins to slowly fall around 1880 CE, with a total amount of RSL fall of 0.09±0.1 m in the last 140 years. Modelled RSL, which takes into account contributions from post-LIA Greenland Ice Sheet glacio-isostatic adjustment (GIA), ongoing deglacial GIA, the global non-ice sheet glacial melt fingerprint, contributions from thermosteric effects, the Antarctic mass loss sea level fingerprint and terrestrial water storage, overpredicts the amount of RSL fall since the end of the LIA by at least 0.5 m. The GIA signal caused by post-LIA Greenland Ice Sheet mass loss is by far the largest contributor to this modelled RSL, and error in its calculation has a large impact on RSL predictions at Dronning Marie Dal. We cannot reconcile the modelled RSL and the salt marsh observations, even when moving the termination of the LIA to 1700 CE and reducing the post-LIA Greenland mass loss signal by 30 %, and a “budget residual” of +∼3 mm yr−1 since the end of the LIA remains unexplained. This new RSL record backs up other studies that suggest that there are significant regional differences in the timing and magnitude of the response of the Greenland Ice Sheet to the climate shift from the LIA into the 20th century.\n
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\n \n\n \n \n \n \n \n \n Last interglacial global mean sea level from high-precision U-series ages of Bahamian fossil coral reefs.\n \n \n \n \n\n\n \n Dumitru, O. A.; Dyer, B.; Austermann, J.; Sandstrom, M. R.; Goldstein, S. L.; D'Andrea, W. J.; Cashman, M.; Creel, R.; Bolge, L.; and Raymo, M. E.\n\n\n \n\n\n\n Quaternary Science Reviews, 318: 108287. October 2023.\n \n\n\n\n
\n\n\n\n \n \n \"LastPaper\n  \n \n\n \n \n doi\n  \n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n \n \n \n \n \n \n \n \n\n\n\n
\n
@article{dumitru_last_2023,\n\ttitle = {Last interglacial global mean sea level from high-precision {U}-series ages of {Bahamian} fossil coral reefs},\n\tvolume = {318},\n\tissn = {0277-3791},\n\turl = {https://www.sciencedirect.com/science/article/pii/S0277379123003359},\n\tdoi = {10.1016/j.quascirev.2023.108287},\n\tabstract = {Accurate characterization of Last Interglacial (MIS 5e; ∼129–116 ka) sea level is important for understanding ice sheet sensitivity to climate change, with implications for predicting future sea-level rise. Here we present a record of MIS 5e sea level based on high-precision U-series ages of 23 corals with precise elevation measurements from reefs around Crooked Island, Long Cay, Long Island, and Eleuthera, The Bahamas. Rigorous screening criteria identified the most pristine samples, and nearly all samples show a narrow δ234Uinitial range between 143.8 and 151.3‰. We infer global mean sea level (GMSL) from these local observations by correcting them for glacial isostatic adjustment (GIA) and long-term subsidence. For GIA, we consider a range of ice histories and Earth viscosity structures. We identify, via Bayesian inference, the range of isostatic and GMSL histories that are consistent with MIS 5e observations across The Bahamas. When applying an open-system correction to our ages, we find that MIS 5e GMSL likely peaked higher than 1 m, but very unlikely exceeded 2.7 m. Our posterior GMSL is lower than previous estimates, but consistent with recent results of modeling and observations. Additionally, sea level observations at other locations (Seychelles, Western Australia, Yucatan) are only slightly above/within the 95\\% range of predicted local sea level, i.e., GIA plus GMSL, for our open-system/closed-system results. Our relatively constant MIS 5e GMSL indicates that Greenland and Antarctica melted beyond their present extents and, given the insolation forcing, that their contributions to GMSL were likely out-of-phase. These results indicate that the ice sheets may be very sensitive to regional temperature, which has important implications for their combined impact on global sea levels at a time when greenhouse gases increases are causing simultaneous warming at both poles.},\n\turldate = {2024-01-29},\n\tjournal = {Quaternary Science Reviews},\n\tauthor = {Dumitru, Oana A. and Dyer, Blake and Austermann, Jacqueline and Sandstrom, Michael R. and Goldstein, Steven L. and D'Andrea, William J. and Cashman, Miranda and Creel, Roger and Bolge, Louise and Raymo, Maureen E.},\n\tmonth = oct,\n\tyear = {2023},\n\tkeywords = {Last interglacial, Sea-level changes, The Bahamas, U-series ages},\n\tpages = {108287},\n}\n\n
\n
\n\n\n
\n Accurate characterization of Last Interglacial (MIS 5e; ∼129–116 ka) sea level is important for understanding ice sheet sensitivity to climate change, with implications for predicting future sea-level rise. Here we present a record of MIS 5e sea level based on high-precision U-series ages of 23 corals with precise elevation measurements from reefs around Crooked Island, Long Cay, Long Island, and Eleuthera, The Bahamas. Rigorous screening criteria identified the most pristine samples, and nearly all samples show a narrow δ234Uinitial range between 143.8 and 151.3‰. We infer global mean sea level (GMSL) from these local observations by correcting them for glacial isostatic adjustment (GIA) and long-term subsidence. For GIA, we consider a range of ice histories and Earth viscosity structures. We identify, via Bayesian inference, the range of isostatic and GMSL histories that are consistent with MIS 5e observations across The Bahamas. When applying an open-system correction to our ages, we find that MIS 5e GMSL likely peaked higher than 1 m, but very unlikely exceeded 2.7 m. Our posterior GMSL is lower than previous estimates, but consistent with recent results of modeling and observations. Additionally, sea level observations at other locations (Seychelles, Western Australia, Yucatan) are only slightly above/within the 95% range of predicted local sea level, i.e., GIA plus GMSL, for our open-system/closed-system results. Our relatively constant MIS 5e GMSL indicates that Greenland and Antarctica melted beyond their present extents and, given the insolation forcing, that their contributions to GMSL were likely out-of-phase. These results indicate that the ice sheets may be very sensitive to regional temperature, which has important implications for their combined impact on global sea levels at a time when greenhouse gases increases are causing simultaneous warming at both poles.\n
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\n \n\n \n \n \n \n \n \n Relative sea level response to mixed carbonate-siliciclastic sediment loading along the Great Barrier Reef margin.\n \n \n \n \n\n\n \n Lin, Y.; Whitehouse, P. L.; Hibbert, F. D.; Woodroffe, S. A.; Hinestrosa, G.; and Webster, J. M.\n\n\n \n\n\n\n Earth and Planetary Science Letters, 607: 118066. April 2023.\n \n\n\n\n
\n\n\n\n \n \n \"RelativePaper\n  \n \n\n \n \n doi\n  \n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n\n\n\n
\n
@article{lin_relative_2023,\n\ttitle = {Relative sea level response to mixed carbonate-siliciclastic sediment loading along the {Great} {Barrier} {Reef} margin},\n\tvolume = {607},\n\tissn = {0012-821X},\n\turl = {https://www.sciencedirect.com/science/article/pii/S0012821X23000791},\n\tdoi = {10.1016/j.epsl.2023.118066},\n\tabstract = {The continental shelf along northeastern Australia is the world's largest mixed carbonate-siliciclastic passive margin and the location of the Great Barrier Reef (GBR). Following sea-level transgression during the last deglaciation, extensive sediment was deposited along the GBR due to neritic carbonate deposition (including shelf edge reefs, Holocene reefs and Halimeda bioherms) and fluvial discharge of terrigenous siliciclastic sediments. Such sediment loading can alter local relative sea level (RSL) by several metres through the sediment isostatic adjustment (SIA) process, a signal that is poorly constrained at the GBR. In this study, we used a glacial isostatic adjustment (GIA) model to develop an ensemble-based sediment loading history for the GBR since Marine Isotope Stage 2 (MIS 2). A Bayesian style framework is adopted to calibrate the sediment history ensemble and GIA model parameters using a sea-level database. According to our results, 1853.7 Gt (1613.1-2078.7 Gt, 95\\% confidence interval) of sediment have been deposited across the GBR since MIS 2 (28 ka BP), causing spatially variable relative sea-level change with the highest magnitude (0.9-1.1 m) found in the outer shelf of the southern central GBR (18.4-21.6∘ S). Because the SIA-induced RSL rise is unrelated to ice mass loss, failing to correct for this signal will lead to systematic overestimation of grounded ice volume by up to ∼4.3 × 105 km3 during the Last Glacial Maximum. Additionally, we found that spatial variation in sediment loading and coastal environment may explain the different RSL history documented by published fossil coral reef records from Noggin Pass and Hydrographer's Passage. These results highlight the importance of considering SIA for any postglacial sea-level studies adjacent to large sediment systems. Lastly, by quantifying both the GIA and SIA signals, we provide a spatially and temporally complete RSL reconstruction that is well-suited to be used as a boundary condition to study the evolution of the GBR shelf and slope sedimentary system.},\n\turldate = {2024-01-29},\n\tjournal = {Earth and Planetary Science Letters},\n\tauthor = {Lin, Yucheng and Whitehouse, Pippa L. and Hibbert, Fiona D. and Woodroffe, Sarah A. and Hinestrosa, Gustavo and Webster, Jody M.},\n\tmonth = apr,\n\tyear = {2023},\n\tkeywords = {glacial isostatic adjustment, sea-level change, sediment evolution, sediment isostatic adjustment, statistical inversion, the Great Barrier Reef},\n\tpages = {118066},\n}\n\n
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\n The continental shelf along northeastern Australia is the world's largest mixed carbonate-siliciclastic passive margin and the location of the Great Barrier Reef (GBR). Following sea-level transgression during the last deglaciation, extensive sediment was deposited along the GBR due to neritic carbonate deposition (including shelf edge reefs, Holocene reefs and Halimeda bioherms) and fluvial discharge of terrigenous siliciclastic sediments. Such sediment loading can alter local relative sea level (RSL) by several metres through the sediment isostatic adjustment (SIA) process, a signal that is poorly constrained at the GBR. In this study, we used a glacial isostatic adjustment (GIA) model to develop an ensemble-based sediment loading history for the GBR since Marine Isotope Stage 2 (MIS 2). A Bayesian style framework is adopted to calibrate the sediment history ensemble and GIA model parameters using a sea-level database. According to our results, 1853.7 Gt (1613.1-2078.7 Gt, 95% confidence interval) of sediment have been deposited across the GBR since MIS 2 (28 ka BP), causing spatially variable relative sea-level change with the highest magnitude (0.9-1.1 m) found in the outer shelf of the southern central GBR (18.4-21.6∘ S). Because the SIA-induced RSL rise is unrelated to ice mass loss, failing to correct for this signal will lead to systematic overestimation of grounded ice volume by up to ∼4.3 × 105 km3 during the Last Glacial Maximum. Additionally, we found that spatial variation in sediment loading and coastal environment may explain the different RSL history documented by published fossil coral reef records from Noggin Pass and Hydrographer's Passage. These results highlight the importance of considering SIA for any postglacial sea-level studies adjacent to large sediment systems. Lastly, by quantifying both the GIA and SIA signals, we provide a spatially and temporally complete RSL reconstruction that is well-suited to be used as a boundary condition to study the evolution of the GBR shelf and slope sedimentary system.\n
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\n \n\n \n \n \n \n \n \n A 5000-year record of relative sea-level change in New Jersey, USA.\n \n \n \n \n\n\n \n Walker, J. S; Li, T.; Shaw, T. A; Cahill, N.; Barber, D. C; Brain, M. J; Kopp, R. E; Switzer, A. D; and Horton, B. P\n\n\n \n\n\n\n The Holocene, 33(2): 167–180. February 2023.\n Publisher: SAGE Publications Ltd\n\n\n\n
\n\n\n\n \n \n \"APaper\n  \n \n\n \n \n doi\n  \n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{walker_5000-year_2023,\n\ttitle = {A 5000-year record of relative sea-level change in {New} {Jersey}, {USA}},\n\tvolume = {33},\n\tissn = {0959-6836},\n\turl = {https://doi.org/10.1177/09596836221131696},\n\tdoi = {10.1177/09596836221131696},\n\tabstract = {Stratigraphic data from salt marshes provide accurate reconstructions of Holocene relative sea-level (RSL) change and necessary constraints to models of glacial isostatic adjustment (GIA), which is the dominant cause of Late-Holocene RSL rise along the U.S. mid-Atlantic coast. Here, we produce a new Mid- to Late-Holocene RSL record from a salt marsh bordering Great Bay in southern New Jersey using basal peats. We use a multi-proxy approach (foraminifera and geochemistry) to identify the indicative meaning of the basal peats and produce sea-level index points (SLIPs) that include a vertical uncertainty for tidal range change and sediment compaction and a temporal uncertainty based on high precision Accelerator Mass Spectrometry radiocarbon dating of salt-marsh plant macrofossils. The 14 basal SLIPs range from 1211 ± 56 years BP to 4414 ± 112 years BP, which we combine with published RSL data from southern New Jersey and use with a spatiotemporal statistical model to show that RSL rose 8.6 m at an average rate of 1.7 ± 0.1 mm/year (1σ) from 5000 years BP to present. We compare the RSL changes with an ensemble of 1D (laterally homogenous) and site-specific 3D (laterally heterogeneous) GIA models, which tend to overestimate the magnitude of RSL rise over the last 5000 years. The continued discrepancy between RSL data and GIA models highlights the importance of using a wide array of ice model and viscosity model parameters to more precisely fit site-specific RSL data along the U.S. mid-Atlantic coast.},\n\tlanguage = {en},\n\tnumber = {2},\n\turldate = {2024-01-29},\n\tjournal = {The Holocene},\n\tauthor = {Walker, Jennifer S and Li, Tanghua and Shaw, Timothy A and Cahill, Niamh and Barber, Donald C and Brain, Matthew J and Kopp, Robert E and Switzer, Adam D and Horton, Benjamin P},\n\tmonth = feb,\n\tyear = {2023},\n\tnote = {Publisher: SAGE Publications Ltd},\n\tpages = {167--180},\n}\n\n
\n
\n\n\n
\n Stratigraphic data from salt marshes provide accurate reconstructions of Holocene relative sea-level (RSL) change and necessary constraints to models of glacial isostatic adjustment (GIA), which is the dominant cause of Late-Holocene RSL rise along the U.S. mid-Atlantic coast. Here, we produce a new Mid- to Late-Holocene RSL record from a salt marsh bordering Great Bay in southern New Jersey using basal peats. We use a multi-proxy approach (foraminifera and geochemistry) to identify the indicative meaning of the basal peats and produce sea-level index points (SLIPs) that include a vertical uncertainty for tidal range change and sediment compaction and a temporal uncertainty based on high precision Accelerator Mass Spectrometry radiocarbon dating of salt-marsh plant macrofossils. The 14 basal SLIPs range from 1211 ± 56 years BP to 4414 ± 112 years BP, which we combine with published RSL data from southern New Jersey and use with a spatiotemporal statistical model to show that RSL rose 8.6 m at an average rate of 1.7 ± 0.1 mm/year (1σ) from 5000 years BP to present. We compare the RSL changes with an ensemble of 1D (laterally homogenous) and site-specific 3D (laterally heterogeneous) GIA models, which tend to overestimate the magnitude of RSL rise over the last 5000 years. The continued discrepancy between RSL data and GIA models highlights the importance of using a wide array of ice model and viscosity model parameters to more precisely fit site-specific RSL data along the U.S. mid-Atlantic coast.\n
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\n \n\n \n \n \n \n \n \n The World Atlas of Last Interglacial Shorelines (version 1.0).\n \n \n \n \n\n\n \n Rovere, A.; Ryan, D. D.; Vacchi, M.; Dutton, A.; Simms, A. R.; and Murray-Wallace, C. V.\n\n\n \n\n\n\n Earth System Science Data, 15(1): 1–23. January 2023.\n Publisher: Copernicus GmbH\n\n\n\n
\n\n\n\n \n \n \"ThePaper\n  \n \n\n \n \n doi\n  \n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{rovere_world_2023,\n\ttitle = {The {World} {Atlas} of {Last} {Interglacial} {Shorelines} (version 1.0)},\n\tvolume = {15},\n\tissn = {1866-3508},\n\turl = {https://essd.copernicus.org/articles/15/1/2023/},\n\tdoi = {10.5194/essd-15-1-2023},\n\tabstract = {This paper presents version 1.0 of the World Atlas of Last Interglacial Shorelines (WALIS), a global database of sea-level proxies and samples dated to marine isotope stage 5 (∼ 80 to 130 ka). The database includes a series of datasets compiled in the framework of a special issue published in this journal (https://essd.copernicus.org/articles/special\\_issue1055.html, last access: 15 December 2022). This paper collates the individual contributions (archived in a Zenodo community at https://zenodo.org/communities/walis\\_database/, last access: 15 December 2022) into an open-access, standalone database (Rovere et al., 2022, https://doi.org/10.5281/zenodo.7348242). The release of WALIS 1.0 includes complete documentation and scripts to download, analyze, and visualize the data (https://alerovere.github.io/WALIS/, last access: 15 December 2022). The database contains 4545 sea-level proxies (e.g., marine terraces or fossil beach deposits), 4110 dated samples (e.g., corals dated with U-series), and 280 other time constraints (e.g., biostratigraphic constraints or tephra layers) interconnected with several tables containing accessory data and metadata. By creating a centralized database of sea-level proxy data for the Last Interglacial, the WALIS database will be a valuable resource to the broader paleoclimate community to facilitate data–model integration and intercomparisons, assessments of sea-level reconstructions between different studies and different regions, as well as comparisons between past sea-level history and other paleoclimate proxy data.},\n\tlanguage = {English},\n\tnumber = {1},\n\turldate = {2024-01-29},\n\tjournal = {Earth System Science Data},\n\tauthor = {Rovere, Alessio and Ryan, Deirdre D. and Vacchi, Matteo and Dutton, Andrea and Simms, Alexander R. and Murray-Wallace, Colin V.},\n\tmonth = jan,\n\tyear = {2023},\n\tnote = {Publisher: Copernicus GmbH},\n\tpages = {1--23},\n}\n\n
\n
\n\n\n
\n This paper presents version 1.0 of the World Atlas of Last Interglacial Shorelines (WALIS), a global database of sea-level proxies and samples dated to marine isotope stage 5 (∼ 80 to 130 ka). The database includes a series of datasets compiled in the framework of a special issue published in this journal (https://essd.copernicus.org/articles/special_issue1055.html, last access: 15 December 2022). This paper collates the individual contributions (archived in a Zenodo community at https://zenodo.org/communities/walis_database/, last access: 15 December 2022) into an open-access, standalone database (Rovere et al., 2022, https://doi.org/10.5281/zenodo.7348242). The release of WALIS 1.0 includes complete documentation and scripts to download, analyze, and visualize the data (https://alerovere.github.io/WALIS/, last access: 15 December 2022). The database contains 4545 sea-level proxies (e.g., marine terraces or fossil beach deposits), 4110 dated samples (e.g., corals dated with U-series), and 280 other time constraints (e.g., biostratigraphic constraints or tephra layers) interconnected with several tables containing accessory data and metadata. By creating a centralized database of sea-level proxy data for the Last Interglacial, the WALIS database will be a valuable resource to the broader paleoclimate community to facilitate data–model integration and intercomparisons, assessments of sea-level reconstructions between different studies and different regions, as well as comparisons between past sea-level history and other paleoclimate proxy data.\n
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\n \n\n \n \n \n \n \n \n GEORGIA: A Graph Neural Network Based EmulatOR for Glacial Isostatic Adjustment.\n \n \n \n \n\n\n \n Lin, Y.; Whitehouse, P. L.; Valentine, A. P.; and Woodroffe, S. A.\n\n\n \n\n\n\n Geophysical Research Letters, 50(18): e2023GL103672. 2023.\n _eprint: https://onlinelibrary.wiley.com/doi/pdf/10.1029/2023GL103672\n\n\n\n
\n\n\n\n \n \n \"GEORGIA:Paper\n  \n \n\n \n \n doi\n  \n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n \n \n \n \n \n \n \n \n\n\n\n
\n
@article{lin_georgia_2023,\n\ttitle = {{GEORGIA}: {A} {Graph} {Neural} {Network} {Based} {EmulatOR} for {Glacial} {Isostatic} {Adjustment}},\n\tvolume = {50},\n\tcopyright = {© 2023. The Authors. Geophysical Research Letters published by Wiley Periodicals LLC on behalf of American Geophysical Union.},\n\tissn = {1944-8007},\n\tshorttitle = {{GEORGIA}},\n\turl = {https://onlinelibrary.wiley.com/doi/abs/10.1029/2023GL103672},\n\tdoi = {10.1029/2023GL103672},\n\tabstract = {Glacial isostatic adjustment (GIA) modeling is not only useful for understanding past relative sea-level change but also for projecting future sea-level change due to ongoing land deformation. However, GIA model predictions are subject to a range of uncertainties, most notably due to uncertainty in the input ice history. An effective way to reduce this uncertainty is to perform data-model comparisons over a large ensemble of possible ice histories, but this is often impossible due to computational limitations. Here we address this problem by building a deep-learning-based GIA emulator that can mimic the behavior of a physics-based GIA model while being computationally cheap to evaluate. Assuming a single 1-D Earth rheology, our emulator shows 0.54 m mean absolute error on 150 out-of-sample testing data with {\\textless}0.5 s emulation time. Using this emulator, two illustrative applications related to the calculation of barystatic sea level are provided for use by the sea-level community.},\n\tlanguage = {en},\n\tnumber = {18},\n\turldate = {2024-01-29},\n\tjournal = {Geophysical Research Letters},\n\tauthor = {Lin, Yucheng and Whitehouse, Pippa L. and Valentine, Andrew P. and Woodroffe, Sarah A.},\n\tyear = {2023},\n\tnote = {\\_eprint: https://onlinelibrary.wiley.com/doi/pdf/10.1029/2023GL103672},\n\tkeywords = {glacial isostatic adjustment, machine learning, sea-level change, statistical emulator},\n\tpages = {e2023GL103672},\n}\n\n
\n
\n\n\n
\n Glacial isostatic adjustment (GIA) modeling is not only useful for understanding past relative sea-level change but also for projecting future sea-level change due to ongoing land deformation. However, GIA model predictions are subject to a range of uncertainties, most notably due to uncertainty in the input ice history. An effective way to reduce this uncertainty is to perform data-model comparisons over a large ensemble of possible ice histories, but this is often impossible due to computational limitations. Here we address this problem by building a deep-learning-based GIA emulator that can mimic the behavior of a physics-based GIA model while being computationally cheap to evaluate. Assuming a single 1-D Earth rheology, our emulator shows 0.54 m mean absolute error on 150 out-of-sample testing data with \\textless0.5 s emulation time. Using this emulator, two illustrative applications related to the calculation of barystatic sea level are provided for use by the sea-level community.\n
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\n \n\n \n \n \n \n \n \n Constraining the contribution of the Antarctic Ice Sheet to Last Interglacial sea level.\n \n \n \n \n\n\n \n Barnett, R. L.; Austermann, J.; Dyer, B.; Telfer, M. W.; Barlow, N. L.; Boulton, S. J.; Carr, A. S.; and Creel, R. C.\n\n\n \n\n\n\n Science Advances, 9(27): eadf0198. July 2023.\n Publisher: American Association for the Advancement of Science\n\n\n\n
\n\n\n\n \n \n \"ConstrainingPaper\n  \n \n\n \n \n doi\n  \n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{barnett_constraining_2023,\n\ttitle = {Constraining the contribution of the {Antarctic} {Ice} {Sheet} to {Last} {Interglacial} sea level},\n\tvolume = {9},\n\turl = {https://www.science.org/doi/full/10.1126/sciadv.adf0198},\n\tdoi = {10.1126/sciadv.adf0198},\n\tabstract = {Polar temperatures during the Last Interglacial [LIG; {\\textasciitilde}129 to 116 thousand years (ka)] were warmer than today, making this time period an important testing ground to better understand how ice sheets respond to warming. However, it remains debated how much and when the Antarctic and Greenland ice sheets changed during this period. Here, we present a combination of new and existing absolutely dated LIG sea-level observations from Britain, France, and Denmark. Because of glacial isostatic adjustment (GIA), the LIG Greenland ice melt contribution to sea-level change in this region is small, which allows us to constrain Antarctic ice change. We find that the Antarctic contribution to LIG global mean sea level peaked early in the interglacial (before 126 ka), with a maximum contribution of 5.7 m (50th percentile, 3.6 to 8.7 m central 68\\% probability) before declining. Our results support an asynchronous melt history over the LIG, with an early Antarctic contribution followed by later Greenland Ice Sheet mass loss.},\n\tnumber = {27},\n\turldate = {2024-01-29},\n\tjournal = {Science Advances},\n\tauthor = {Barnett, Robert L. and Austermann, Jacqueline and Dyer, Blake and Telfer, Matt W. and Barlow, Natasha L. M. and Boulton, Sarah J. and Carr, Andrew S. and Creel, Roger C.},\n\tmonth = jul,\n\tyear = {2023},\n\tnote = {Publisher: American Association for the Advancement of Science},\n\tpages = {eadf0198},\n}\n\n
\n
\n\n\n
\n Polar temperatures during the Last Interglacial [LIG; ~129 to 116 thousand years (ka)] were warmer than today, making this time period an important testing ground to better understand how ice sheets respond to warming. However, it remains debated how much and when the Antarctic and Greenland ice sheets changed during this period. Here, we present a combination of new and existing absolutely dated LIG sea-level observations from Britain, France, and Denmark. Because of glacial isostatic adjustment (GIA), the LIG Greenland ice melt contribution to sea-level change in this region is small, which allows us to constrain Antarctic ice change. We find that the Antarctic contribution to LIG global mean sea level peaked early in the interglacial (before 126 ka), with a maximum contribution of 5.7 m (50th percentile, 3.6 to 8.7 m central 68% probability) before declining. Our results support an asynchronous melt history over the LIG, with an early Antarctic contribution followed by later Greenland Ice Sheet mass loss.\n
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\n  \n 2022\n \n \n (13)\n \n \n
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\n \n\n \n \n \n \n \n \n An approach for constraining mantle viscosities through assimilation of palaeo sea level data into a glacial isostatic adjustment model.\n \n \n \n \n\n\n \n Schachtschneider, R.; Saynisch-Wagner, J.; Klemann, V.; Bagge, M.; and Thomas, M.\n\n\n \n\n\n\n Nonlinear Processes in Geophysics, 29(1): 53–75. February 2022.\n Publisher: Copernicus GmbH\n\n\n\n
\n\n\n\n \n \n \"AnPaper\n  \n \n\n \n \n doi\n  \n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{schachtschneider_approach_2022,\n\ttitle = {An approach for constraining mantle viscosities through assimilation of palaeo sea level data into a glacial isostatic adjustment model},\n\tvolume = {29},\n\tissn = {1023-5809},\n\turl = {https://npg.copernicus.org/articles/29/53/2022/},\n\tdoi = {10.5194/npg-29-53-2022},\n\tabstract = {Glacial isostatic adjustment is largely governed by the rheological properties of the Earth's mantle. Large mass redistributions in the ocean–cryosphere system and the subsequent response of the viscoelastic Earth have led to dramatic sea level changes in the past. This process is ongoing, and in order to understand and predict current and future sea level changes, the knowledge of mantle properties such as viscosity is essential. In this study, we present a method to obtain estimates of mantle viscosities by the assimilation of relative sea level rates of change into a viscoelastic model of the lithosphere and mantle. We set up a particle filter with probabilistic resampling. In an identical twin experiment, we show that mantle viscosities can be recovered in a glacial isostatic adjustment model of a simple three-layer Earth structure consisting of an elastic lithosphere and two mantle layers of different viscosity. We investigate the ensemble behaviour on different parameters in the following three set-ups: (1) global observations data set since last glacial maximum with different ensemble initialisations and observation uncertainties, (2) regional observations from Fennoscandia or Laurentide/Greenland only, and (3) limiting the observation period to 10 ka until the present. We show that the recovery is successful in all cases if the target parameter values are properly sampled by the initial ensemble probability distribution. This even includes cases in which the target viscosity values are located far in the tail of the initial ensemble probability distribution. Experiments show that the method is successful if enough near-field observations are available. This makes it work best for a period after substantial deglaciation until the present when the number of sea level indicators is relatively high.},\n\tlanguage = {English},\n\tnumber = {1},\n\turldate = {2024-01-29},\n\tjournal = {Nonlinear Processes in Geophysics},\n\tauthor = {Schachtschneider, Reyko and Saynisch-Wagner, Jan and Klemann, Volker and Bagge, Meike and Thomas, Maik},\n\tmonth = feb,\n\tyear = {2022},\n\tnote = {Publisher: Copernicus GmbH},\n\tpages = {53--75},\n}\n\n
\n
\n\n\n
\n Glacial isostatic adjustment is largely governed by the rheological properties of the Earth's mantle. Large mass redistributions in the ocean–cryosphere system and the subsequent response of the viscoelastic Earth have led to dramatic sea level changes in the past. This process is ongoing, and in order to understand and predict current and future sea level changes, the knowledge of mantle properties such as viscosity is essential. In this study, we present a method to obtain estimates of mantle viscosities by the assimilation of relative sea level rates of change into a viscoelastic model of the lithosphere and mantle. We set up a particle filter with probabilistic resampling. In an identical twin experiment, we show that mantle viscosities can be recovered in a glacial isostatic adjustment model of a simple three-layer Earth structure consisting of an elastic lithosphere and two mantle layers of different viscosity. We investigate the ensemble behaviour on different parameters in the following three set-ups: (1) global observations data set since last glacial maximum with different ensemble initialisations and observation uncertainties, (2) regional observations from Fennoscandia or Laurentide/Greenland only, and (3) limiting the observation period to 10 ka until the present. We show that the recovery is successful in all cases if the target parameter values are properly sampled by the initial ensemble probability distribution. This even includes cases in which the target viscosity values are located far in the tail of the initial ensemble probability distribution. Experiments show that the method is successful if enough near-field observations are available. This makes it work best for a period after substantial deglaciation until the present when the number of sea level indicators is relatively high.\n
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\n \n\n \n \n \n \n \n \n Last interglacial sea-level proxies in the glaciated Northern Hemisphere.\n \n \n \n \n\n\n \n Dalton, A. S.; Gowan, E. J.; Mangerud, J.; Möller, P.; Lunkka, J. P.; and Astakhov, V.\n\n\n \n\n\n\n Earth System Science Data, 14(4): 1447–1492. April 2022.\n Publisher: Copernicus GmbH\n\n\n\n
\n\n\n\n \n \n \"LastPaper\n  \n \n\n \n \n doi\n  \n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{dalton_last_2022,\n\ttitle = {Last interglacial sea-level proxies in the glaciated {Northern} {Hemisphere}},\n\tvolume = {14},\n\tissn = {1866-3508},\n\turl = {https://essd.copernicus.org/articles/14/1447/2022/},\n\tdoi = {10.5194/essd-14-1447-2022},\n\tabstract = {Because global sea level during the last interglacial (LIG; 130–115 ka) was higher than today, the LIG is a useful approximate analogue for improving predictions of future sea-level rise. Here, we synthesize sea-level proxies for the LIG in the glaciated Northern Hemisphere for inclusion in the World Atlas of Last Interglacial Shorelines (WALIS) database. We describe 82 sites from Russia, northern Europe, Greenland and North America from a variety of settings, including boreholes, riverbank exposures and along coastal cliffs. Marine sediments at these sites were constrained to the LIG using a variety of radiometric methods (radiocarbon, uranium–thorium, potassium–argon), non-radiometric methods (amino acid dating, luminescence methods, electron spin resonance, tephrochronology) as well as various stratigraphic and palaeo-environmental approaches. In general, the sites reported in this paper do not offer constraint on the global LIG highstand, but rather evidence of glacial isostatic adjustment (GIA)-influenced sea-level positions following the Marine Isotope Stage 6 glaciation (MIS 6; 191–130 ka). Most of the proxies suggest that sea level was much higher during the LIG than at the present time. Moreover, many of the sites show evidence of regression due to sea-level fall (owing to glacial isostatic uplift), and some also show fluctuations that may reflect regrowth of continental ice or increased influence of the global sea-level signal. In addition to documenting LIG sea-level sites in a large swath of the Northern Hemisphere, this compilation is highly relevant for reconstructing the size of MIS 6 ice sheets through GIA modelling. The database is available at https://doi.org/10.5281/zenodo.5602212 (Dalton et al., 2021).},\n\tlanguage = {English},\n\tnumber = {4},\n\turldate = {2024-01-29},\n\tjournal = {Earth System Science Data},\n\tauthor = {Dalton, April S. and Gowan, Evan J. and Mangerud, Jan and Möller, Per and Lunkka, Juha P. and Astakhov, Valery},\n\tmonth = apr,\n\tyear = {2022},\n\tnote = {Publisher: Copernicus GmbH},\n\tpages = {1447--1492},\n}\n\n
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\n Because global sea level during the last interglacial (LIG; 130–115 ka) was higher than today, the LIG is a useful approximate analogue for improving predictions of future sea-level rise. Here, we synthesize sea-level proxies for the LIG in the glaciated Northern Hemisphere for inclusion in the World Atlas of Last Interglacial Shorelines (WALIS) database. We describe 82 sites from Russia, northern Europe, Greenland and North America from a variety of settings, including boreholes, riverbank exposures and along coastal cliffs. Marine sediments at these sites were constrained to the LIG using a variety of radiometric methods (radiocarbon, uranium–thorium, potassium–argon), non-radiometric methods (amino acid dating, luminescence methods, electron spin resonance, tephrochronology) as well as various stratigraphic and palaeo-environmental approaches. In general, the sites reported in this paper do not offer constraint on the global LIG highstand, but rather evidence of glacial isostatic adjustment (GIA)-influenced sea-level positions following the Marine Isotope Stage 6 glaciation (MIS 6; 191–130 ka). Most of the proxies suggest that sea level was much higher during the LIG than at the present time. Moreover, many of the sites show evidence of regression due to sea-level fall (owing to glacial isostatic uplift), and some also show fluctuations that may reflect regrowth of continental ice or increased influence of the global sea-level signal. In addition to documenting LIG sea-level sites in a large swath of the Northern Hemisphere, this compilation is highly relevant for reconstructing the size of MIS 6 ice sheets through GIA modelling. The database is available at https://doi.org/10.5281/zenodo.5602212 (Dalton et al., 2021).\n
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\n \n\n \n \n \n \n \n \n Insights on the origin of multiple tsunami events affected the archaeological site of Ognina (south-eastern Sicily, Italy).\n \n \n \n \n\n\n \n Scardino, G.; Rizzo, A.; De Santis, V.; Kyriakoudi, D.; Rovere, A.; Vacchi, M.; Torrisi, S.; and Scicchitano, G.\n\n\n \n\n\n\n Quaternary International, 638-639: 122–139. November 2022.\n \n\n\n\n
\n\n\n\n \n \n \"InsightsPaper\n  \n \n\n \n \n doi\n  \n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n\n\n\n
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@article{scardino_insights_2022,\n\tseries = {Lost {Landscapes}: {Reconstructing} the {Evolution} of {Coastal} {Areas} since the {Late} {Pleistocene}},\n\ttitle = {Insights on the origin of multiple tsunami events affected the archaeological site of {Ognina} (south-eastern {Sicily}, {Italy})},\n\tvolume = {638-639},\n\tissn = {1040-6182},\n\turl = {https://www.sciencedirect.com/science/article/pii/S1040618221004845},\n\tdoi = {10.1016/j.quaint.2021.09.013},\n\tabstract = {South-eastern Sicily is one of the most seismically active areas of the Mediterranean Sea, marked by a high level of crustal seismicity, causing major earthquakes (up to Mw ∼7). As a consequence, this area is prone to earthquake-generated tsunamis, which affected the Ionian coast of Sicily in historical times. These tsunamis left geomorphic and sedimentary imprints, such as large boulders or high-energy deposits, along the coasts. One of these was reported by previous works along the coast of Ognina, a small residential area located 20 km south of Siracusa. The deposits fill the back edge of a ria incised into Miocene limestones, are composed of three main stratigraphic units and were attributed to several tsunami and storm events that occurred along the coasts of south-eastern Sicily since the IV century Common Era (CE). Here, we use numerical models to simulate the impact of these extreme marine events, at the time of their occurrence, along the Ognina coastal sector, with the aim to: i) better define the tsunamigenic sources responsible for the events found in the deposits, ii) verify if some units could be related to a storm event, iii) investigate constrains on the paleogeography of the studied area at the time of tsunami and storm occurrence. We reconstructed the morphology of ancient local landscapes using geological and historical information, together with a detailed topographic and geoelectrical survey. We implemented a modelling chain (composed of Delft Dashboard, Delft 3d-FLOW and XBeach) to simulate the tsunami and storm wave propagation upon the ancient landscapes. Our results demonstrate that the use of advanced modeling tools, combined with in situ geological evidence and geophysical survey, has the potential to support the attribution of coastal geomorphic imprints to specific tsunami or storm events, the better definition of the paleo-landscapes, and the identification of the most likely tsunamigenic sources. This last aspect plays a fundamental role in providing more reliable characteristics of the tsunami propagation as well as in the assessing of potential tsunami hazard and related coastal impacts.},\n\turldate = {2024-01-29},\n\tjournal = {Quaternary International},\n\tauthor = {Scardino, Giovanni and Rizzo, Angela and De Santis, Vincenzo and Kyriakoudi, Despo and Rovere, Alessio and Vacchi, Matteo and Torrisi, Salvatore and Scicchitano, Giovanni},\n\tmonth = nov,\n\tyear = {2022},\n\tkeywords = {Coastal flooding, Earthquake, Faults, Sea-level, Tsunami, Tsunamigenic sources},\n\tpages = {122--139},\n}\n\n
\n
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\n South-eastern Sicily is one of the most seismically active areas of the Mediterranean Sea, marked by a high level of crustal seismicity, causing major earthquakes (up to Mw ∼7). As a consequence, this area is prone to earthquake-generated tsunamis, which affected the Ionian coast of Sicily in historical times. These tsunamis left geomorphic and sedimentary imprints, such as large boulders or high-energy deposits, along the coasts. One of these was reported by previous works along the coast of Ognina, a small residential area located 20 km south of Siracusa. The deposits fill the back edge of a ria incised into Miocene limestones, are composed of three main stratigraphic units and were attributed to several tsunami and storm events that occurred along the coasts of south-eastern Sicily since the IV century Common Era (CE). Here, we use numerical models to simulate the impact of these extreme marine events, at the time of their occurrence, along the Ognina coastal sector, with the aim to: i) better define the tsunamigenic sources responsible for the events found in the deposits, ii) verify if some units could be related to a storm event, iii) investigate constrains on the paleogeography of the studied area at the time of tsunami and storm occurrence. We reconstructed the morphology of ancient local landscapes using geological and historical information, together with a detailed topographic and geoelectrical survey. We implemented a modelling chain (composed of Delft Dashboard, Delft 3d-FLOW and XBeach) to simulate the tsunami and storm wave propagation upon the ancient landscapes. Our results demonstrate that the use of advanced modeling tools, combined with in situ geological evidence and geophysical survey, has the potential to support the attribution of coastal geomorphic imprints to specific tsunami or storm events, the better definition of the paleo-landscapes, and the identification of the most likely tsunamigenic sources. This last aspect plays a fundamental role in providing more reliable characteristics of the tsunami propagation as well as in the assessing of potential tsunami hazard and related coastal impacts.\n
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\n \n\n \n \n \n \n \n \n Compilation of Last Interglacial (Marine Isotope Stage 5e) sea-level indicators in the Bahamas, Turks and Caicos, and the east coast of Florida, USA.\n \n \n \n \n\n\n \n Dutton, A.; Villa, A.; and Chutcharavan, P. M.\n\n\n \n\n\n\n Earth System Science Data, 14(5): 2385–2399. May 2022.\n Publisher: Copernicus GmbH\n\n\n\n
\n\n\n\n \n \n \"CompilationPaper\n  \n \n\n \n \n doi\n  \n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{dutton_compilation_2022,\n\ttitle = {Compilation of {Last} {Interglacial} ({Marine} {Isotope} {Stage} 5e) sea-level indicators in the {Bahamas}, {Turks} and {Caicos}, and the east coast of {Florida}, {USA}},\n\tvolume = {14},\n\tissn = {1866-3508},\n\turl = {https://essd.copernicus.org/articles/14/2385/2022/},\n\tdoi = {10.5194/essd-14-2385-2022},\n\tabstract = {This paper provides a summary of published sea-level archives representing the past position of sea level during the Last Interglacial sea-level highstand in the Bahamas, Turks and Caicos, and the eastern (Atlantic) coast of Florida, USA. These data were assembled as part of a community effort to build the World Atlas of Last Interglacial Shorelines (WALIS) database. Shallow marine deposits from this sea-level highstand are widespread across the region and are dominated by carbonate sedimentary features. In addition to depositional (constructional) sedimentary indicators of past sea-level position, there is also evidence of erosion, dissolution, and/or subaerial exposure in places that can place an upper limit on the position of sea level. The sea-level indicators that have been observed within this region and attributed to Marine Isotope Stage (MIS) 5e include corals, oolites, and other coastal sedimentary features.\n\n Here we compile a total of 50 relative sea-level indicators including 36 in the Bahamas, three in West Caicos, and a remaining 10 for the eastern seaboard of Florida. We have also compiled U-Th age data for 24 fossil corals and 56 oolite samples. While some of these archives have been dated using U-Th disequilibrium methods, amino acid racemization, or optically stimulated luminescence, other features have more uncertain ages that have been deduced in the context of regional mapping and stratigraphy. Sedimentary archives in this region that constrain the elevation of the past position of sea level are associated with uncertainties that range from a couple of decimeters to several meters. Across the Bahamas and on West Caicos, one of the observations that emerges from this compilation is that estimation of sea-level position in this region during Marine Isotope Stage 5e is complicated by widespread stratigraphic evidence for at least one sea-level oscillation. This evidence is defined by submarine features separated by erosion and subaerial exposure, meaning that there were likely multiple distinct peaks in sea level rather than just one. To this end, the timing of these individual sea-level indicators becomes important when compiling and comparing data across the region given that different archives may have formed during different sub-orbital peaks in sea level. The database can be found at https://doi.org/10.5281/zenodo.5596898 (Dutton et al., 2021).},\n\tlanguage = {English},\n\tnumber = {5},\n\turldate = {2024-01-29},\n\tjournal = {Earth System Science Data},\n\tauthor = {Dutton, Andrea and Villa, Alexandra and Chutcharavan, Peter M.},\n\tmonth = may,\n\tyear = {2022},\n\tnote = {Publisher: Copernicus GmbH},\n\tpages = {2385--2399},\n}\n\n
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\n\n\n
\n This paper provides a summary of published sea-level archives representing the past position of sea level during the Last Interglacial sea-level highstand in the Bahamas, Turks and Caicos, and the eastern (Atlantic) coast of Florida, USA. These data were assembled as part of a community effort to build the World Atlas of Last Interglacial Shorelines (WALIS) database. Shallow marine deposits from this sea-level highstand are widespread across the region and are dominated by carbonate sedimentary features. In addition to depositional (constructional) sedimentary indicators of past sea-level position, there is also evidence of erosion, dissolution, and/or subaerial exposure in places that can place an upper limit on the position of sea level. The sea-level indicators that have been observed within this region and attributed to Marine Isotope Stage (MIS) 5e include corals, oolites, and other coastal sedimentary features. Here we compile a total of 50 relative sea-level indicators including 36 in the Bahamas, three in West Caicos, and a remaining 10 for the eastern seaboard of Florida. We have also compiled U-Th age data for 24 fossil corals and 56 oolite samples. While some of these archives have been dated using U-Th disequilibrium methods, amino acid racemization, or optically stimulated luminescence, other features have more uncertain ages that have been deduced in the context of regional mapping and stratigraphy. Sedimentary archives in this region that constrain the elevation of the past position of sea level are associated with uncertainties that range from a couple of decimeters to several meters. Across the Bahamas and on West Caicos, one of the observations that emerges from this compilation is that estimation of sea-level position in this region during Marine Isotope Stage 5e is complicated by widespread stratigraphic evidence for at least one sea-level oscillation. This evidence is defined by submarine features separated by erosion and subaerial exposure, meaning that there were likely multiple distinct peaks in sea level rather than just one. To this end, the timing of these individual sea-level indicators becomes important when compiling and comparing data across the region given that different archives may have formed during different sub-orbital peaks in sea level. The database can be found at https://doi.org/10.5281/zenodo.5596898 (Dutton et al., 2021).\n
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\n \n\n \n \n \n \n \n \n Relative sea-level change in South Florida during the past ~5000 years.\n \n \n \n \n\n\n \n Khan, N. S.; Ashe, E.; Moyer, R. P.; Kemp, A. C.; Engelhart, S. E.; Brain, M. J.; Toth, L. T.; Chappel, A.; Christie, M.; Kopp, R. E.; and Horton, B. P.\n\n\n \n\n\n\n Global and Planetary Change, 216: 103902. September 2022.\n \n\n\n\n
\n\n\n\n \n \n \"RelativePaper\n  \n \n\n \n \n doi\n  \n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n \n \n \n \n \n \n \n \n \n \n\n\n\n
\n
@article{khan_relative_2022,\n\ttitle = {Relative sea-level change in {South} {Florida} during the past {\\textasciitilde}5000 years},\n\tvolume = {216},\n\tissn = {0921-8181},\n\turl = {https://www.sciencedirect.com/science/article/pii/S0921818122001692},\n\tdoi = {10.1016/j.gloplacha.2022.103902},\n\tabstract = {A paucity of detailed relative sea-level (RSL) reconstructions from low latitudes hinders efforts to understand the global, regional, and local processes that cause RSL change. We reconstruct RSL change during the past {\\textasciitilde}5 ka using cores of mangrove peat at two sites (Snipe Key and Swan Key) in the Florida Keys. Remote sensing and field surveys established the relationship between peat-forming mangroves and tidal elevation in South Florida. Core chronologies are developed from age-depth models applied to 72 radiocarbon dates (39 mangrove wood macrofossils and 33 fine-fraction bulk peat). RSL rose 3.7 m at Snipe Key and 5.0 m at Swan Key in the past 5 ka, with both sites recording the fastest century-scale rate of RSL rise since {\\textasciitilde}1900 CE ({\\textasciitilde}2.1 mm/a). We demonstrate that it is feasible to produce near-continuous reconstructions of RSL from mangrove peat in regions with a microtidal regime and accommodation space created by millennial-scale RSL rise. Decomposition of RSL trends from a network of reconstructions across South Florida using a spatio-temporal model suggests that Snipe Key was representative of regional RSL trends, but Swan Key was influenced by an additional local-scale process acting over at least the past five millennia. Geotechnical analysis of modern and buried mangrove peat indicates that sediment compaction is not the local-scale process responsible for the exaggerated RSL rise at Swan Key. The substantial difference in RSL between two nearby sites highlights the critical need for within-region replication of RSL reconstructions to avoid misattribution of sea-level trends, which could also have implications for geophysical modeling studies using RSL data for model tuning and validation.},\n\turldate = {2024-01-29},\n\tjournal = {Global and Planetary Change},\n\tauthor = {Khan, Nicole S. and Ashe, Erica and Moyer, Ryan P. and Kemp, Andrew C. and Engelhart, Simon E. and Brain, Matthew J. and Toth, Lauren T. and Chappel, Amanda and Christie, Margaret and Kopp, Robert E. and Horton, Benjamin P.},\n\tmonth = sep,\n\tyear = {2022},\n\tkeywords = {Holocene, Mangrove, Proxy reconstruction, Reproducibility, Sea level},\n\tpages = {103902},\n}\n\n
\n
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\n A paucity of detailed relative sea-level (RSL) reconstructions from low latitudes hinders efforts to understand the global, regional, and local processes that cause RSL change. We reconstruct RSL change during the past ~5 ka using cores of mangrove peat at two sites (Snipe Key and Swan Key) in the Florida Keys. Remote sensing and field surveys established the relationship between peat-forming mangroves and tidal elevation in South Florida. Core chronologies are developed from age-depth models applied to 72 radiocarbon dates (39 mangrove wood macrofossils and 33 fine-fraction bulk peat). RSL rose 3.7 m at Snipe Key and 5.0 m at Swan Key in the past 5 ka, with both sites recording the fastest century-scale rate of RSL rise since ~1900 CE (~2.1 mm/a). We demonstrate that it is feasible to produce near-continuous reconstructions of RSL from mangrove peat in regions with a microtidal regime and accommodation space created by millennial-scale RSL rise. Decomposition of RSL trends from a network of reconstructions across South Florida using a spatio-temporal model suggests that Snipe Key was representative of regional RSL trends, but Swan Key was influenced by an additional local-scale process acting over at least the past five millennia. Geotechnical analysis of modern and buried mangrove peat indicates that sediment compaction is not the local-scale process responsible for the exaggerated RSL rise at Swan Key. The substantial difference in RSL between two nearby sites highlights the critical need for within-region replication of RSL reconstructions to avoid misattribution of sea-level trends, which could also have implications for geophysical modeling studies using RSL data for model tuning and validation.\n
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\n \n\n \n \n \n \n \n \n Drivers of 20th century sea-level change in southern New Zealand determined from proxy and instrumental records.\n \n \n \n \n\n\n \n Garrett, E.; Gehrels, W. R.; Hayward, B. W.; Newnham, R.; Gehrels, M. J.; Morey, C. J.; and Dangendorf, S.\n\n\n \n\n\n\n Journal of Quaternary Science, 37(6): 1025–1043. 2022.\n _eprint: https://onlinelibrary.wiley.com/doi/pdf/10.1002/jqs.3418\n\n\n\n
\n\n\n\n \n \n \"DriversPaper\n  \n \n\n \n \n doi\n  \n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n \n \n \n \n \n \n \n \n \n \n\n\n\n
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@article{garrett_drivers_2022,\n\ttitle = {Drivers of 20th century sea-level change in southern {New} {Zealand} determined from proxy and instrumental records},\n\tvolume = {37},\n\tcopyright = {© 2022 The Authors Journal of Quaternary Science Published by John Wiley \\& Sons Ltd},\n\tissn = {1099-1417},\n\turl = {https://onlinelibrary.wiley.com/doi/abs/10.1002/jqs.3418},\n\tdoi = {10.1002/jqs.3418},\n\tabstract = {In this paper we present new proxy-based sea-level reconstructions for southern New Zealand spanning the last millennium. These palaeo sea-level records usefully complement sparse Southern Hemisphere proxy and tide-gauge sea-level datasets and, in combination with instrumental observations, can test hypotheses about the drivers of 20th century global sea-level change, including land-based ice melt and regional sterodynamics. We develop sea-level transfer functions from regional datasets of salt-marsh foraminifera to establish a new proxy-based sea-level record at Mokomoko Inlet, at the southern tip of the South Island, and to improve the previously published sea-level reconstruction at Pounawea, located about 110 km to the east. Chronologies are based on radiocarbon, radiocaesium, stable lead isotope and pollen analyses. Both records are in good agreement and show a rapid sea-level rise in the first half of the 20th century that peaked in the 1940s. Previously reported discrepancies between proxy-based sea-level records and tide-gauge records are partially reconciled by accounting for barystatic and sterodynamic components of regional sea-level rise. We conclude that the rapid sea-level rise during the mid-20th century along the coast of southern New Zealand was primarily driven by regional thermal expansion and ocean dynamics.},\n\tlanguage = {en},\n\tnumber = {6},\n\turldate = {2024-01-29},\n\tjournal = {Journal of Quaternary Science},\n\tauthor = {Garrett, Ed and Gehrels, W. Roland and Hayward, Bruce W. and Newnham, Rewi and Gehrels, Maria J. and Morey, Craig J. and Dangendorf, Sönke},\n\tyear = {2022},\n\tnote = {\\_eprint: https://onlinelibrary.wiley.com/doi/pdf/10.1002/jqs.3418},\n\tkeywords = {barystatic, foraminifera, sea level, sterodynamic, transfer function},\n\tpages = {1025--1043},\n}\n\n
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\n In this paper we present new proxy-based sea-level reconstructions for southern New Zealand spanning the last millennium. These palaeo sea-level records usefully complement sparse Southern Hemisphere proxy and tide-gauge sea-level datasets and, in combination with instrumental observations, can test hypotheses about the drivers of 20th century global sea-level change, including land-based ice melt and regional sterodynamics. We develop sea-level transfer functions from regional datasets of salt-marsh foraminifera to establish a new proxy-based sea-level record at Mokomoko Inlet, at the southern tip of the South Island, and to improve the previously published sea-level reconstruction at Pounawea, located about 110 km to the east. Chronologies are based on radiocarbon, radiocaesium, stable lead isotope and pollen analyses. Both records are in good agreement and show a rapid sea-level rise in the first half of the 20th century that peaked in the 1940s. Previously reported discrepancies between proxy-based sea-level records and tide-gauge records are partially reconciled by accounting for barystatic and sterodynamic components of regional sea-level rise. We conclude that the rapid sea-level rise during the mid-20th century along the coast of southern New Zealand was primarily driven by regional thermal expansion and ocean dynamics.\n
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\n \n\n \n \n \n \n \n \n Influence of 3D Earth Structure on Glacial Isostatic Adjustment in the Russian Arctic.\n \n \n \n \n\n\n \n Li, T.; Khan, N. S.; Baranskaya, A. V.; Shaw, T. A.; Peltier, W. R.; Stuhne, G. R.; Wu, P.; and Horton, B. P.\n\n\n \n\n\n\n Journal of Geophysical Research: Solid Earth, 127(3): e2021JB023631. 2022.\n _eprint: https://onlinelibrary.wiley.com/doi/pdf/10.1029/2021JB023631\n\n\n\n
\n\n\n\n \n \n \"InfluencePaper\n  \n \n\n \n \n doi\n  \n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n\n\n\n
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@article{li_influence_2022,\n\ttitle = {Influence of {3D} {Earth} {Structure} on {Glacial} {Isostatic} {Adjustment} in the {Russian} {Arctic}},\n\tvolume = {127},\n\tcopyright = {© 2022 The Authors.},\n\tissn = {2169-9356},\n\turl = {https://onlinelibrary.wiley.com/doi/abs/10.1029/2021JB023631},\n\tdoi = {10.1029/2021JB023631},\n\tabstract = {Analyses of glacial isostatic adjustment (GIA) and deglacial relative sea-level (RSL) change in the Russian Arctic deliver important insights into the Earth's viscosity structure and the deglaciation history of the Eurasian ice sheet complex. Here, we validate the 1D GIA models ICE-6G\\_C (VM5a) and ICE-7G\\_NA (VM7) and select new 3D GIA models in the Russian Arctic against a quality-controlled deglacial RSL database of {\\textgreater}500 sea-level data points from 24 regions. Both 1D models correspond to the RSL data along the southern coast of the Barents Sea and Franz Josef Land from ∼11 ka BP to present but show notable misfits ({\\textgreater}50 m at 10 ka BP) with the White Sea data. We find 3D model predictions of deglacial RSL resolve most of the misfits with the observed data for the White Sea while retaining comparable fits in other regions of the Russian Arctic. Our results further reveal: (a) RSL in the western Russian Arctic is sensitive to elastic lithosphere with lateral thickness variation and 3D viscosity structure in the upper mantle; and (b) RSL in the whole Russian Arctic is less sensitive to 3D viscosity structure in the lower mantle compared to the upper mantle. The 3D models reveal a compromise in the upper mantle between the background viscosity and scaling factor to best fit the RSL data, which needs to be considered in future 3D GIA studies.},\n\tlanguage = {en},\n\tnumber = {3},\n\turldate = {2024-01-29},\n\tjournal = {Journal of Geophysical Research: Solid Earth},\n\tauthor = {Li, Tanghua and Khan, Nicole S. and Baranskaya, Alisa V. and Shaw, Timothy A. and Peltier, W. Richard and Stuhne, Gordan R. and Wu, Patrick and Horton, Benjamin P.},\n\tyear = {2022},\n\tnote = {\\_eprint: https://onlinelibrary.wiley.com/doi/pdf/10.1029/2021JB023631},\n\tkeywords = {Russian Arctic, deglaciation history, glacial isostatic adjustment, lateral heterogeneity, mantle rheology, sea-level change},\n\tpages = {e2021JB023631},\n}\n\n
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\n Analyses of glacial isostatic adjustment (GIA) and deglacial relative sea-level (RSL) change in the Russian Arctic deliver important insights into the Earth's viscosity structure and the deglaciation history of the Eurasian ice sheet complex. Here, we validate the 1D GIA models ICE-6G_C (VM5a) and ICE-7G_NA (VM7) and select new 3D GIA models in the Russian Arctic against a quality-controlled deglacial RSL database of \\textgreater500 sea-level data points from 24 regions. Both 1D models correspond to the RSL data along the southern coast of the Barents Sea and Franz Josef Land from ∼11 ka BP to present but show notable misfits (\\textgreater50 m at 10 ka BP) with the White Sea data. We find 3D model predictions of deglacial RSL resolve most of the misfits with the observed data for the White Sea while retaining comparable fits in other regions of the Russian Arctic. Our results further reveal: (a) RSL in the western Russian Arctic is sensitive to elastic lithosphere with lateral thickness variation and 3D viscosity structure in the upper mantle; and (b) RSL in the whole Russian Arctic is less sensitive to 3D viscosity structure in the lower mantle compared to the upper mantle. The 3D models reveal a compromise in the upper mantle between the background viscosity and scaling factor to best fit the RSL data, which needs to be considered in future 3D GIA studies.\n
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\n \n\n \n \n \n \n \n \n The marine δ18O record overestimates continental ice volume during Marine Isotope Stage 3.\n \n \n \n \n\n\n \n Dalton, A. S.; Pico, T.; Gowan, E. J.; Clague, J. J.; Forman, S. L.; McMartin, I.; Sarala, P.; and Helmens, K. F.\n\n\n \n\n\n\n Global and Planetary Change, 212: 103814. May 2022.\n \n\n\n\n
\n\n\n\n \n \n \"ThePaper\n  \n \n\n \n \n doi\n  \n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n\n\n\n
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@article{dalton_marine_2022,\n\ttitle = {The marine δ{18O} record overestimates continental ice volume during {Marine} {Isotope} {Stage} 3},\n\tvolume = {212},\n\tissn = {0921-8181},\n\turl = {https://www.sciencedirect.com/science/article/pii/S0921818122000819},\n\tdoi = {10.1016/j.gloplacha.2022.103814},\n\tabstract = {There is disagreement in the Quaternary research community in how much of the marine δ18O signal is driven by change in ice volume. Here, we examine this topic by bringing together empirical and modelling work for Marine Isotope Stage 3 (MIS 3; 57 ka to 29 ka), a time when the marine δ18O record indicates moderate continental glaciation and a global mean sea level between −60 m and −90 m. We compile and interpret geological data dating to MIS 3 to constrain the extent of major Northern Hemisphere ice sheets (Eurasian, Laurentide, Cordilleran). Many key data, especially published in the past {\\textasciitilde}15 years, argue for an ice-free core of the formerly glaciated regions that is inconsistent with inferences from the marine δ18O record. We compile results from prior studies of glacial isostatic adjustment to show the volume of ice inferred from the marine δ18O record is unable to fit within the plausible footprint of Northern Hemisphere ice sheets during MIS 3. Instead, a global mean sea level between −30 m and − 50 m is inferred from geological constraints and glacial isostatic modelling. Furthermore, limited North American ice volumes during MIS 3 are consistent with most sea-level bounds through that interval. We can find no concrete evidence of large-scale glaciation during MIS 3 that could account for the missing {\\textasciitilde}30 m of sea-level equivalent during that time, which suggests that changes in the marine δ18O record are driven by other variables, including water temperature. This work urges caution regarding the reliance of the marine δ18O record as a de facto indicator of continental ice when few geological constraints are available, which underpins many Quaternary studies.},\n\turldate = {2024-01-29},\n\tjournal = {Global and Planetary Change},\n\tauthor = {Dalton, April S. and Pico, Tamara and Gowan, Evan J. and Clague, John J. and Forman, Steven L. and McMartin, Isabelle and Sarala, Pertti and Helmens, Karin F.},\n\tmonth = may,\n\tyear = {2022},\n\tkeywords = {Cordilleran, Fennoscandian, Global mean sea level, Laurentide, Mid-Weichselian, Mid-Wisconsinan},\n\tpages = {103814},\n}\n\n
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\n There is disagreement in the Quaternary research community in how much of the marine δ18O signal is driven by change in ice volume. Here, we examine this topic by bringing together empirical and modelling work for Marine Isotope Stage 3 (MIS 3; 57 ka to 29 ka), a time when the marine δ18O record indicates moderate continental glaciation and a global mean sea level between −60 m and −90 m. We compile and interpret geological data dating to MIS 3 to constrain the extent of major Northern Hemisphere ice sheets (Eurasian, Laurentide, Cordilleran). Many key data, especially published in the past ~15 years, argue for an ice-free core of the formerly glaciated regions that is inconsistent with inferences from the marine δ18O record. We compile results from prior studies of glacial isostatic adjustment to show the volume of ice inferred from the marine δ18O record is unable to fit within the plausible footprint of Northern Hemisphere ice sheets during MIS 3. Instead, a global mean sea level between −30 m and − 50 m is inferred from geological constraints and glacial isostatic modelling. Furthermore, limited North American ice volumes during MIS 3 are consistent with most sea-level bounds through that interval. We can find no concrete evidence of large-scale glaciation during MIS 3 that could account for the missing ~30 m of sea-level equivalent during that time, which suggests that changes in the marine δ18O record are driven by other variables, including water temperature. This work urges caution regarding the reliance of the marine δ18O record as a de facto indicator of continental ice when few geological constraints are available, which underpins many Quaternary studies.\n
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\n \n\n \n \n \n \n \n \n The influence of lateral Earth structure on inferences of global ice volume during the Last Glacial Maximum.\n \n \n \n \n\n\n \n Pan, L.; Milne, G. A.; Latychev, K.; Goldberg, S. L.; Austermann, J.; Hoggard, M. J.; and Mitrovica, J. X.\n\n\n \n\n\n\n Quaternary Science Reviews, 290: 107644. August 2022.\n \n\n\n\n
\n\n\n\n \n \n \"ThePaper\n  \n \n\n \n \n doi\n  \n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n \n \n \n \n \n \n \n \n \n \n\n\n\n
\n
@article{pan_influence_2022,\n\ttitle = {The influence of lateral {Earth} structure on inferences of global ice volume during the {Last} {Glacial} {Maximum}},\n\tvolume = {290},\n\tissn = {0277-3791},\n\turl = {https://www.sciencedirect.com/science/article/pii/S027737912200275X},\n\tdoi = {10.1016/j.quascirev.2022.107644},\n\tabstract = {The mapping between far-field relative sea level (RSL) records and changes in ice volume or global mean sea level (GMSL) involves a correction for glacial isostatic adjustment (GIA). This mapping is thus sensitive to uncertainties inherent to GIA modeling, including the spatio-temporal history of ice mass changes and viscoelastic Earth structure. Here, we investigate the effect of incorporating lateral variations in Earth structure on predicting far-field sea level in order to determine if this source of model uncertainty significantly impacts estimates of global ice volume at the Last Glacial Maximum (LGM). We consider a set of forty 3-D simulations that sample different Earth model parameters: the adopted lithospheric thickness, the seismic velocity model used to infer lateral temperature variations, the scaling factor used in the conversion from temperature to viscosity, and the spherically averaged “background” viscosity profile. In addition, we consider results based on two ice histories. We present global maps of the differences between these simulations and a set of 1-D simulations at the LGM, as well as RSL histories at 5 locations that have been previously considered in estimates of ice volume at LGM: Barbados, two sites at the Great Barrier Reef, Bonaparte Gulf and Sunda Shelf. We find that the difference between inferences of global mean sea level (GMSL) at LGM based on 3-D and 1-D Earth models peaks in Barbados with differences ranging from ∼2.5 to 11 m, with a mean of ∼6–7 m. At the other sites, the difference ranges from ∼2 to −8 m, with mean differences between ∼0 and −3 m. After comparing different pairs of simulations, we conclude that, in general, the impact of varying the seismic model, lithospheric thickness model, background 1-D model, and scaling factor from temperature to viscosity is significant at far-field sites. Finally, while we do not find a consistent signal at the above far-field sites that would help to reconcile the LGM ice volumes estimated from GIA studies and those estimated from summing regional ice sheet reconstructions, the impact is nonetheless large enough that GIA analyses of RSL records in the far field of ice sheets should include 3-D viscoelastic Earth models.},\n\turldate = {2024-01-29},\n\tjournal = {Quaternary Science Reviews},\n\tauthor = {Pan, Linda and Milne, Glenn A. and Latychev, Konstantin and Goldberg, Samuel L. and Austermann, Jacqueline and Hoggard, Mark J. and Mitrovica, Jerry X.},\n\tmonth = aug,\n\tyear = {2022},\n\tkeywords = {Glacial isostatic adjustment, Global ice volume, Last glacial maximum, Numerical modeling, Sea-level change},\n\tpages = {107644},\n}\n\n
\n
\n\n\n
\n The mapping between far-field relative sea level (RSL) records and changes in ice volume or global mean sea level (GMSL) involves a correction for glacial isostatic adjustment (GIA). This mapping is thus sensitive to uncertainties inherent to GIA modeling, including the spatio-temporal history of ice mass changes and viscoelastic Earth structure. Here, we investigate the effect of incorporating lateral variations in Earth structure on predicting far-field sea level in order to determine if this source of model uncertainty significantly impacts estimates of global ice volume at the Last Glacial Maximum (LGM). We consider a set of forty 3-D simulations that sample different Earth model parameters: the adopted lithospheric thickness, the seismic velocity model used to infer lateral temperature variations, the scaling factor used in the conversion from temperature to viscosity, and the spherically averaged “background” viscosity profile. In addition, we consider results based on two ice histories. We present global maps of the differences between these simulations and a set of 1-D simulations at the LGM, as well as RSL histories at 5 locations that have been previously considered in estimates of ice volume at LGM: Barbados, two sites at the Great Barrier Reef, Bonaparte Gulf and Sunda Shelf. We find that the difference between inferences of global mean sea level (GMSL) at LGM based on 3-D and 1-D Earth models peaks in Barbados with differences ranging from ∼2.5 to 11 m, with a mean of ∼6–7 m. At the other sites, the difference ranges from ∼2 to −8 m, with mean differences between ∼0 and −3 m. After comparing different pairs of simulations, we conclude that, in general, the impact of varying the seismic model, lithospheric thickness model, background 1-D model, and scaling factor from temperature to viscosity is significant at far-field sites. Finally, while we do not find a consistent signal at the above far-field sites that would help to reconcile the LGM ice volumes estimated from GIA studies and those estimated from summing regional ice sheet reconstructions, the impact is nonetheless large enough that GIA analyses of RSL records in the far field of ice sheets should include 3-D viscoelastic Earth models.\n
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\n \n\n \n \n \n \n \n \n Last interglacial sea-level proxies in the Korean Peninsula.\n \n \n \n \n\n\n \n Ryang, W. H.; Simms, A. R.; Yoon, H. H.; Chun, S. S.; and Kong, G. S.\n\n\n \n\n\n\n Earth System Science Data, 14(1): 117–142. January 2022.\n Publisher: Copernicus GmbH\n\n\n\n
\n\n\n\n \n \n \"LastPaper\n  \n \n\n \n \n doi\n  \n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{ryang_last_2022,\n\ttitle = {Last interglacial sea-level proxies in the {Korean} {Peninsula}},\n\tvolume = {14},\n\tissn = {1866-3508},\n\turl = {https://essd.copernicus.org/articles/14/117/2022/},\n\tdoi = {10.5194/essd-14-117-2022},\n\tabstract = {Like most of the world's coastlines, the Korean Peninsula experienced higher-than-present sea levels during the last interglacial (LIG), otherwise known as Marine Isotope Stage (MIS) 5e. However, the expression of that highstand in the geological record differs across the eastern and western Korean Peninsula. The tectonically active east coast of the Korean Peninsula is characterized by broad uplifted marine terraces, while the stable west coast is characterized by tidal flats and rias. In this study, we used a standardized database template to review and extract the existing constraints on LIG sea levels along both the east and west coasts of the Korean Peninsula. A total of 62 LIG constraining data points were compiled including 34 sea-level indicators, 22 marine limiting records, and 6 terrestrial limiting records. The ages from these data points are based on 61 optically stimulated luminescence (OSL) measurements and 1 paleomagnetic-based age. Along the uplifted east coast, LIG sea-level indicators based on marine terraces are at elevations ranging from +9 to +32 m. The uplifted marine terraces are cut or otherwise deformed by faults developed under a compressional regime due to back-arc closing of the East Sea since the early Pliocene. As a result, tectonic uplift likely has affected the elevations of the east coast LIG shorelines. In contrast, LIG sea-level records on the west coast of the Korean Peninsula are found at heights of between +3 and +6 m and include marine and terrestrial elevation limiting records as well as true sea-level indicators. The LIG sea-level constraints along the west coast of the Korean Peninsula are likely unaffected by vertical movement or experienced minor subsidence during the Quaternary. The database is available open access at https://doi.org/10.5281/zenodo.4974826 (Ryang and Simms, 2021).},\n\tlanguage = {English},\n\tnumber = {1},\n\turldate = {2024-01-29},\n\tjournal = {Earth System Science Data},\n\tauthor = {Ryang, Woo Hun and Simms, Alexander R. and Yoon, Hyun Ho and Chun, Seung Soo and Kong, Gee Soo},\n\tmonth = jan,\n\tyear = {2022},\n\tnote = {Publisher: Copernicus GmbH},\n\tpages = {117--142},\n}\n\n
\n
\n\n\n
\n Like most of the world's coastlines, the Korean Peninsula experienced higher-than-present sea levels during the last interglacial (LIG), otherwise known as Marine Isotope Stage (MIS) 5e. However, the expression of that highstand in the geological record differs across the eastern and western Korean Peninsula. The tectonically active east coast of the Korean Peninsula is characterized by broad uplifted marine terraces, while the stable west coast is characterized by tidal flats and rias. In this study, we used a standardized database template to review and extract the existing constraints on LIG sea levels along both the east and west coasts of the Korean Peninsula. A total of 62 LIG constraining data points were compiled including 34 sea-level indicators, 22 marine limiting records, and 6 terrestrial limiting records. The ages from these data points are based on 61 optically stimulated luminescence (OSL) measurements and 1 paleomagnetic-based age. Along the uplifted east coast, LIG sea-level indicators based on marine terraces are at elevations ranging from +9 to +32 m. The uplifted marine terraces are cut or otherwise deformed by faults developed under a compressional regime due to back-arc closing of the East Sea since the early Pliocene. As a result, tectonic uplift likely has affected the elevations of the east coast LIG shorelines. In contrast, LIG sea-level records on the west coast of the Korean Peninsula are found at heights of between +3 and +6 m and include marine and terrestrial elevation limiting records as well as true sea-level indicators. The LIG sea-level constraints along the west coast of the Korean Peninsula are likely unaffected by vertical movement or experienced minor subsidence during the Quaternary. The database is available open access at https://doi.org/10.5281/zenodo.4974826 (Ryang and Simms, 2021).\n
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\n \n\n \n \n \n \n \n \n Plutonium isotopes in the North Western Pacific sediments coupled with radiocarbon in corals recording precise timing of the Anthropocene.\n \n \n \n \n\n\n \n Yokoyama, Y.; Tims, S.; Froehlich, M.; Hirabayashi, S.; Aze, T.; Fifield, L. K.; Koll, D.; Miyairi, Y.; Pavetich, S.; and Kuwae, M.\n\n\n \n\n\n\n Scientific Reports, 12(1): 10068. July 2022.\n Number: 1 Publisher: Nature Publishing Group\n\n\n\n
\n\n\n\n \n \n \"PlutoniumPaper\n  \n \n\n \n \n doi\n  \n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n \n \n \n \n\n\n\n
\n
@article{yokoyama_plutonium_2022,\n\ttitle = {Plutonium isotopes in the {North} {Western} {Pacific} sediments coupled with radiocarbon in corals recording precise timing of the {Anthropocene}},\n\tvolume = {12},\n\tcopyright = {2022 The Author(s)},\n\tissn = {2045-2322},\n\turl = {https://www.nature.com/articles/s41598-022-14179-w},\n\tdoi = {10.1038/s41598-022-14179-w},\n\tabstract = {Plutonium (Pu) has been used as a mid-twentieth century time-marker in various geological archives as a result of atmospheric nuclear tests mainly conducted in 1950s. Advancement of analytical techniques allows us to measure 239Pu and 240Pu more accurately and can thereby reconstruct the Pacific Pu signal that originated from the former Pacific Proving Grounds (PPG) in the Marshall Islands. Here, we propose a novel method that couples annual banded reef building corals and nearshore anoxic marine sediments to provide a marker to precisely determine the start of the nuclear era which is known as a part of the Anthropocene. We demonstrate the efficacy of the methods using sediment obtained from Beppu Bay, Japan, and a coral from Ishigaki Island, Japan. The sedimentary records show a clear Pu increase from 1950, peaking during the 1960s, and then showing a sharp decline during the 1970s. However, a constantly higher isotope ratio between 239Pu and 240Pu suggest an additional contribution other than global fallout via ocean currents. Furthermore, single elevations in 240Pu/239Pu provide supportive evidence of close-in-fallout similar to previous studies. Coral skeletal radiocarbon displays a clear timing with the signatures supporting the reliability of the Beppu Bay sediments as archives and demonstrates the strength of this method to capture potential Anthropocene signatures.},\n\tlanguage = {en},\n\tnumber = {1},\n\turldate = {2024-01-29},\n\tjournal = {Scientific Reports},\n\tauthor = {Yokoyama, Yusuke and Tims, Stephen and Froehlich, Michaela and Hirabayashi, Shoko and Aze, Takahiro and Fifield, L. Keith and Koll, Dominik and Miyairi, Yosuke and Pavetich, Stefan and Kuwae, Michinobu},\n\tmonth = jul,\n\tyear = {2022},\n\tnote = {Number: 1\nPublisher: Nature Publishing Group},\n\tkeywords = {Geochemistry, Sedimentology},\n\tpages = {10068},\n}\n\n
\n
\n\n\n
\n Plutonium (Pu) has been used as a mid-twentieth century time-marker in various geological archives as a result of atmospheric nuclear tests mainly conducted in 1950s. Advancement of analytical techniques allows us to measure 239Pu and 240Pu more accurately and can thereby reconstruct the Pacific Pu signal that originated from the former Pacific Proving Grounds (PPG) in the Marshall Islands. Here, we propose a novel method that couples annual banded reef building corals and nearshore anoxic marine sediments to provide a marker to precisely determine the start of the nuclear era which is known as a part of the Anthropocene. We demonstrate the efficacy of the methods using sediment obtained from Beppu Bay, Japan, and a coral from Ishigaki Island, Japan. The sedimentary records show a clear Pu increase from 1950, peaking during the 1960s, and then showing a sharp decline during the 1970s. However, a constantly higher isotope ratio between 239Pu and 240Pu suggest an additional contribution other than global fallout via ocean currents. Furthermore, single elevations in 240Pu/239Pu provide supportive evidence of close-in-fallout similar to previous studies. Coral skeletal radiocarbon displays a clear timing with the signatures supporting the reliability of the Beppu Bay sediments as archives and demonstrates the strength of this method to capture potential Anthropocene signatures.\n
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\n \n\n \n \n \n \n \n \n Timing of emergence of modern rates of sea-level rise by 1863.\n \n \n \n \n\n\n \n Walker, J. S.; Kopp, R. E.; Little, C. M.; and Horton, B. P.\n\n\n \n\n\n\n Nature Communications, 13(1): 966. February 2022.\n Number: 1 Publisher: Nature Publishing Group\n\n\n\n
\n\n\n\n \n \n \"TimingPaper\n  \n \n\n \n \n doi\n  \n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n \n \n \n \n \n \n\n\n\n
\n
@article{walker_timing_2022,\n\ttitle = {Timing of emergence of modern rates of sea-level rise by 1863},\n\tvolume = {13},\n\tcopyright = {2022 The Author(s)},\n\tissn = {2041-1723},\n\turl = {https://www.nature.com/articles/s41467-022-28564-6},\n\tdoi = {10.1038/s41467-022-28564-6},\n\tabstract = {Sea-level rise is a significant indicator of broader climate changes, and the time of emergence concept can be used to identify when modern rates of sea-level rise emerged above background variability. Yet a range of estimates of the timing persists both globally and regionally. Here, we use a global database of proxy sea-level records of the Common Era (0–2000 CE) and show that globally, it is very likely that rates of sea-level rise emerged above pre-industrial rates by 1863 CE (P = 0.9; range of 1825 [P = 0.66] to 1873 CE [P = 0.95]), which is similar in timing to evidence for early ocean warming and glacier melt. The time of emergence in the North Atlantic reveals a distinct spatial pattern, appearing earliest in the mid-Atlantic region (1872–1894 CE) and later in Canada and Europe (1930–1964 CE). Regional and local sea-level changes occurring over different time periods drive the spatial pattern in emergence, suggesting regional processes underlie centennial-timescale sea-level variability over the Common Era.},\n\tlanguage = {en},\n\tnumber = {1},\n\turldate = {2024-01-29},\n\tjournal = {Nature Communications},\n\tauthor = {Walker, Jennifer S. and Kopp, Robert E. and Little, Christopher M. and Horton, Benjamin P.},\n\tmonth = feb,\n\tyear = {2022},\n\tnote = {Number: 1\nPublisher: Nature Publishing Group},\n\tkeywords = {Climate change, Ocean sciences, Palaeoclimate},\n\tpages = {966},\n}\n\n
\n
\n\n\n
\n Sea-level rise is a significant indicator of broader climate changes, and the time of emergence concept can be used to identify when modern rates of sea-level rise emerged above background variability. Yet a range of estimates of the timing persists both globally and regionally. Here, we use a global database of proxy sea-level records of the Common Era (0–2000 CE) and show that globally, it is very likely that rates of sea-level rise emerged above pre-industrial rates by 1863 CE (P = 0.9; range of 1825 [P = 0.66] to 1873 CE [P = 0.95]), which is similar in timing to evidence for early ocean warming and glacier melt. The time of emergence in the North Atlantic reveals a distinct spatial pattern, appearing earliest in the mid-Atlantic region (1872–1894 CE) and later in Canada and Europe (1930–1964 CE). Regional and local sea-level changes occurring over different time periods drive the spatial pattern in emergence, suggesting regional processes underlie centennial-timescale sea-level variability over the Common Era.\n
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\n \n\n \n \n \n \n \n \n Implications of anomalous relative sea-level rise for the peopling of Remote Oceania.\n \n \n \n \n\n\n \n Sefton, J. P.; Kemp, A. C.; Engelhart, S. E.; Ellison, J. C.; Karegar, M. A.; Charley, B.; and McCoy, M. D.\n\n\n \n\n\n\n Proceedings of the National Academy of Sciences, 119(52): e2210863119. December 2022.\n Publisher: Proceedings of the National Academy of Sciences\n\n\n\n
\n\n\n\n \n \n \"ImplicationsPaper\n  \n \n\n \n \n doi\n  \n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{sefton_implications_2022,\n\ttitle = {Implications of anomalous relative sea-level rise for the peopling of {Remote} {Oceania}},\n\tvolume = {119},\n\turl = {https://www.pnas.org/doi/abs/10.1073/pnas.2210863119},\n\tdoi = {10.1073/pnas.2210863119},\n\tabstract = {Beginning {\\textasciitilde}3,500 to 3,300 y B.P., humans voyaged into Remote Oceania. Radiocarbon-dated archaeological evidence coupled with cultural, linguistic, and genetic traits indicates two primary migration routes: a Southern Hemisphere and a Northern Hemisphere route. These routes are separated by low-lying, equatorial atolls that were settled during secondary migrations {\\textasciitilde}1,000 y later after their exposure by relative sea-level fall from a mid-Holocene highstand. High volcanic islands in the Federated States of Micronesia (Pohnpei and Kosrae) also lie between the migration routes and settlement is thought to have occurred during the secondary migrations despite having been above sea level during the initial settlement of Remote Oceania. We reconstruct relative sea level on Pohnpei and Kosrae using radiocarbon-dated mangrove sediment and show that, rather than falling, there was a {\\textasciitilde}4.3-m rise over the past {\\textasciitilde}5,700 y. This rise, likely driven by subsidence, implies that evidence for early settlement could lie undiscovered below present sea level. The potential for earlier settlement invites reinterpretation of migration pathways into Remote Oceania and monument building. The UNESCO World Heritage sites of Nan Madol (Pohnpei) and Leluh (Kosrae) were constructed when relative sea level was {\\textasciitilde}0.94 m ({\\textasciitilde}770 to 750 y B.P.) and {\\textasciitilde}0.77 m ({\\textasciitilde}640 to 560 y B.P.) lower than present, respectively. Therefore, it is unlikely that they were originally constructed as islets separated by canals filled with ocean water, which is their prevailing interpretation. Due to subsidence, we propose that these islands and monuments are more vulnerable to future relative sea-level rise than previously identified.},\n\tnumber = {52},\n\turldate = {2024-01-29},\n\tjournal = {Proceedings of the National Academy of Sciences},\n\tauthor = {Sefton, Juliet P. and Kemp, Andrew C. and Engelhart, Simon E. and Ellison, Joanna C. and Karegar, Makan A. and Charley, Blair and McCoy, Mark D.},\n\tmonth = dec,\n\tyear = {2022},\n\tnote = {Publisher: Proceedings of the National Academy of Sciences},\n\tpages = {e2210863119},\n}\n\n
\n
\n\n\n
\n Beginning ~3,500 to 3,300 y B.P., humans voyaged into Remote Oceania. Radiocarbon-dated archaeological evidence coupled with cultural, linguistic, and genetic traits indicates two primary migration routes: a Southern Hemisphere and a Northern Hemisphere route. These routes are separated by low-lying, equatorial atolls that were settled during secondary migrations ~1,000 y later after their exposure by relative sea-level fall from a mid-Holocene highstand. High volcanic islands in the Federated States of Micronesia (Pohnpei and Kosrae) also lie between the migration routes and settlement is thought to have occurred during the secondary migrations despite having been above sea level during the initial settlement of Remote Oceania. We reconstruct relative sea level on Pohnpei and Kosrae using radiocarbon-dated mangrove sediment and show that, rather than falling, there was a ~4.3-m rise over the past ~5,700 y. This rise, likely driven by subsidence, implies that evidence for early settlement could lie undiscovered below present sea level. The potential for earlier settlement invites reinterpretation of migration pathways into Remote Oceania and monument building. The UNESCO World Heritage sites of Nan Madol (Pohnpei) and Leluh (Kosrae) were constructed when relative sea level was ~0.94 m (~770 to 750 y B.P.) and ~0.77 m (~640 to 560 y B.P.) lower than present, respectively. Therefore, it is unlikely that they were originally constructed as islets separated by canals filled with ocean water, which is their prevailing interpretation. Due to subsidence, we propose that these islands and monuments are more vulnerable to future relative sea-level rise than previously identified.\n
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\n  \n 2014\n \n \n (2)\n \n \n
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\n \n\n \n \n \n \n \n An updated database of Holocene relative sea level changes in NE Aegean Sea.\n \n \n \n\n\n \n Vacchi, M.; Rovere, A.; Chatzipetros, A.; Zouros, N.; and Firpo, M.\n\n\n \n\n\n\n Quaternary International, 328: 301–310. 2014.\n Publisher: Elsevier\n\n\n\n
\n\n\n\n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{vacchi_updated_2014,\n\ttitle = {An updated database of {Holocene} relative sea level changes in {NE} {Aegean} {Sea}},\n\tvolume = {328},\n\tjournal = {Quaternary International},\n\tauthor = {Vacchi, Matteo and Rovere, Alessio and Chatzipetros, Alexandros and Zouros, Nickolas and Firpo, Marco},\n\tyear = {2014},\n\tnote = {Publisher: Elsevier},\n\tpages = {301--310},\n}\n\n
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\n \n\n \n \n \n \n \n \n Storm erosion during the past 2000 years along the north shore of Delaware Bay, USA.\n \n \n \n \n\n\n \n Nikitina, D. L; Kemp, A. C; Horton, B. P; Vane, C. H; van de Plassche, O.; and Engelhart, S. E\n\n\n \n\n\n\n Geomorphology, 208: 160–172. 2014.\n Publisher: Elsevier\n\n\n\n
\n\n\n\n \n \n \"StormPaper\n  \n \n\n \n \n doi\n  \n \n\n \n link\n  \n \n\n bibtex\n \n\n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n \n \n \n \n \n \n \n \n \n \n\n\n\n
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@article{nikitina_storm_2014,\n\ttitle = {Storm erosion during the past 2000 years along the north shore of {Delaware} {Bay}, {USA}},\n\tvolume = {208},\n\tissn = {0169555X},\n\turl = {http://linkinghub.elsevier.com/retrieve/pii/S0169555X13006016},\n\tdoi = {10.1016/j.geomorph.2013.11.022},\n\tjournal = {Geomorphology},\n\tauthor = {Nikitina, Daria L and Kemp, Andrew C and Horton, Benjamin P and Vane, Christopher H and van de Plassche, Orson and Engelhart, Simon E},\n\tyear = {2014},\n\tnote = {Publisher: Elsevier},\n\tkeywords = {Delaware Estuary, Holocene, Paleotempestology, Salt-marsh, Tropical cyclone},\n\tpages = {160--172},\n}\n\n
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\n  \n 2013\n \n \n (7)\n \n \n
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\n \n\n \n \n \n \n \n Combining ice core records and ice sheet models to explore the evolution of the East Antarctic Ice sheet during the Last Interglacial period.\n \n \n \n\n\n \n Bradley, S L; Siddall, M; Milne, G A; Masson-Delmotte, V; and Wolff, E\n\n\n \n\n\n\n Global and Planetary Change, 100: 278–290. 2013.\n ISBN: 0921-8181 Publisher: Elsevier\n\n\n\n
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@article{bradley_combining_2013,\n\ttitle = {Combining ice core records and ice sheet models to explore the evolution of the {East} {Antarctic} {Ice} sheet during the {Last} {Interglacial} period},\n\tvolume = {100},\n\tissn = {09218181},\n\tdoi = {10.1016/j.gloplacha.2012.11.002},\n\tabstract = {This study evaluates the influence of plausible changes in East Antarctic Ice sheet (EAIS) thickness and the subsequent glacio-isostatic response as a contributor to the Antarctic warming indicated by ice core records during the Last Interglacial period (LIG). These higher temperatures have been estimated primarily using the difference in the δD peak (on average. ∼. 15‰) in these LIG records relative to records for the Present Interglacial (PIG). Using a preliminary exploratory modelling study, it is shown that introducing a relatively moderate reduction in the amount of thickening of the EAIS over the LIG period introduces a significant increase (up to 8‰) in the predicted elevation-driven only δD signal at the central Antarctic Ice sheet (AIS) ice core sites compared to the PIG. A sensitivity test in response to a large prescribed retreat of marine-based ice in the Wilkes and Aurora subglacial basins (equivalent to ∼. 7. m of global mean sea-level rise) results in a distinct elevation signal that is resolvable within the ice core stable isotope records at three sites (Taylor Dome, TALDICE and EPICA Dome C). These findings have two main implications. First, EAIS elevation's only effects could account for a significant fraction of the LIG warming interpreted from ice core records. This result highlights the need for an improved estimate to be made of the uncertainty and size of this elevation-driven δD signal which contributes to this LIG warming and that these effects need to be deconvolved prior to attempting to extract a climatic-only signal from the stable isotope data. Second, a fingerprint of significant retreat of ice in the Wilkes and Aurora basins should be detectable from ice core δD records proximal to these basins and therefore used to constrain their contribution to elevated LIG sea levels, after accounting for ice sheet-climate interactions not considered in our approach. © 2012 Elsevier B.V..},\n\tjournal = {Global and Planetary Change},\n\tauthor = {Bradley, S L and Siddall, M and Milne, G A and Masson-Delmotte, V and Wolff, E},\n\tyear = {2013},\n\tnote = {ISBN: 0921-8181\nPublisher: Elsevier},\n\tkeywords = {Antarctic Ice Sheet, Eustatic sea level, Ice cores, Ice sheet models, Isostasy, Last Interglacial},\n\tpages = {278--290},\n}\n\n
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\n This study evaluates the influence of plausible changes in East Antarctic Ice sheet (EAIS) thickness and the subsequent glacio-isostatic response as a contributor to the Antarctic warming indicated by ice core records during the Last Interglacial period (LIG). These higher temperatures have been estimated primarily using the difference in the δD peak (on average. ∼. 15‰) in these LIG records relative to records for the Present Interglacial (PIG). Using a preliminary exploratory modelling study, it is shown that introducing a relatively moderate reduction in the amount of thickening of the EAIS over the LIG period introduces a significant increase (up to 8‰) in the predicted elevation-driven only δD signal at the central Antarctic Ice sheet (AIS) ice core sites compared to the PIG. A sensitivity test in response to a large prescribed retreat of marine-based ice in the Wilkes and Aurora subglacial basins (equivalent to ∼. 7. m of global mean sea-level rise) results in a distinct elevation signal that is resolvable within the ice core stable isotope records at three sites (Taylor Dome, TALDICE and EPICA Dome C). These findings have two main implications. First, EAIS elevation's only effects could account for a significant fraction of the LIG warming interpreted from ice core records. This result highlights the need for an improved estimate to be made of the uncertainty and size of this elevation-driven δD signal which contributes to this LIG warming and that these effects need to be deconvolved prior to attempting to extract a climatic-only signal from the stable isotope data. Second, a fingerprint of significant retreat of ice in the Wilkes and Aurora basins should be detectable from ice core δD records proximal to these basins and therefore used to constrain their contribution to elevated LIG sea levels, after accounting for ice sheet-climate interactions not considered in our approach. © 2012 Elsevier B.V..\n
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\n \n\n \n \n \n \n \n When did modern rates of sea-level rise start?.\n \n \n \n\n\n \n Gehrels, W. R.; and Woodworth, P. L.\n\n\n \n\n\n\n 2013.\n ISBN: 0921-8181 ISSN: 09218181 Pages: 263–277 Publication Title: Global and Planetary Change Volume: 100\n\n\n\n
\n\n\n\n \n\n \n \n doi\n  \n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n\n\n\n
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@misc{gehrels_when_2013,\n\ttitle = {When did modern rates of sea-level rise start?},\n\tabstract = {Accelerations and inflexions in recent sea-level records are known from instrumental (tide-gauge) datasets, but such records are generally too short to shed light on the question when modern rapid rates of sea-level rise commenced. Proxy sea-level records should therefore also be considered. In this review we compare recent proxy and instrumental sea-level records from the North Atlantic, Australia and New Zealand with the long-term (linear) rate of relative sea-level change that prevailed in the centuries and millennia before the 19th century. We re-evaluate dating models that underpin many of the proxy records and only consider published sea-level index points for which a reliable age can be firmly established. For seven coastal sites we determine the start of recent rapid sea-level rise by identifying the time when sea-level rise first departed from the long-term background rate. We find that within a 40. year period, centred around 1925, sea-level rise in all sites started to exceed the late Holocene background rate. This is consistent with local tide-gauge records and also with global and regional tide-gauge compilations. We conclude that proxy and instrumental sea-level datasets record a similar 20th century inflexion. Possible mismatches identified in published literature are therefore reconciled. We suggest that northern hemisphere ice melt, primarily from the Greenland Ice Sheet and small Arctic glaciers, is the main driving mechanism of early 20th century sea-level rise. © 2012 Elsevier B.V..},\n\tauthor = {Gehrels, W. Roland and Woodworth, Philip L.},\n\tyear = {2013},\n\tdoi = {10.1016/j.gloplacha.2012.10.020},\n\tnote = {ISBN: 0921-8181\nISSN: 09218181\nPages: 263–277\nPublication Title: Global and Planetary Change\nVolume: 100},\n\tkeywords = {Anthropocene, Holocene, Microfossils, Salt marsh, Sea level, Tide gauge},\n}\n\n
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\n Accelerations and inflexions in recent sea-level records are known from instrumental (tide-gauge) datasets, but such records are generally too short to shed light on the question when modern rapid rates of sea-level rise commenced. Proxy sea-level records should therefore also be considered. In this review we compare recent proxy and instrumental sea-level records from the North Atlantic, Australia and New Zealand with the long-term (linear) rate of relative sea-level change that prevailed in the centuries and millennia before the 19th century. We re-evaluate dating models that underpin many of the proxy records and only consider published sea-level index points for which a reliable age can be firmly established. For seven coastal sites we determine the start of recent rapid sea-level rise by identifying the time when sea-level rise first departed from the long-term background rate. We find that within a 40. year period, centred around 1925, sea-level rise in all sites started to exceed the late Holocene background rate. This is consistent with local tide-gauge records and also with global and regional tide-gauge compilations. We conclude that proxy and instrumental sea-level datasets record a similar 20th century inflexion. Possible mismatches identified in published literature are therefore reconciled. We suggest that northern hemisphere ice melt, primarily from the Greenland Ice Sheet and small Arctic glaciers, is the main driving mechanism of early 20th century sea-level rise. © 2012 Elsevier B.V..\n
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\n \n\n \n \n \n \n \n Reconstructing Holocene sea level using salt-marsh foraminifera and transfer functions : lessons from New Jersey , USA.\n \n \n \n\n\n \n Kemp, A. C; Telford, R. J; Horton, B. P; Anisfeld, S. C; and Sommerfield, C. K\n\n\n \n\n\n\n Journal of Quaternary Science, 28(6): 617–629. 2013.\n Publisher: Wiley Online Library\n\n\n\n
\n\n\n\n \n\n \n \n doi\n  \n \n\n \n link\n  \n \n\n bibtex\n \n\n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n\n\n\n
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@article{kemp_reconstructing_2013,\n\ttitle = {Reconstructing {Holocene} sea level using salt-marsh foraminifera and transfer functions : lessons from {New} {Jersey} , {USA}},\n\tvolume = {28},\n\tdoi = {10.1002/jqs.2657},\n\tnumber = {6},\n\tjournal = {Journal of Quaternary Science},\n\tauthor = {Kemp, Andrew C and Telford, Richard J and Horton, Benjamin P and Anisfeld, Shimon C and Sommerfield, Christopher K},\n\tyear = {2013},\n\tnote = {Publisher: Wiley Online Library},\n\tkeywords = {analog matching, barnegat bay, leave-one-site-out cross validation, partitioning, sea-level indicators, weighted},\n\tpages = {617--629},\n}\n\n
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\n \n\n \n \n \n \n \n A geological perspective on sea-level rise and its impacts along the U.S. mid-Atlantic coast.\n \n \n \n\n\n \n Miller, K. G; Kopp, R. E; Horton, B. P; Browning, J. V; and Kemp, A. C\n\n\n \n\n\n\n Earth's Future, 1(1): 3–18. 2013.\n ISBN: 2328-4277 Publisher: Wiley Online Library\n\n\n\n
\n\n\n\n \n\n \n \n doi\n  \n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n \n \n \n \n \n \n \n \n\n\n\n
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@article{miller_geological_2013,\n\ttitle = {A geological perspective on sea-level rise and its impacts along the {U}.{S}. mid-{Atlantic} coast},\n\tvolume = {1},\n\tissn = {23284277},\n\tdoi = {10.1002/2013EF000135},\n\tabstract = {We evaluate paleo-, historical, and future sea-level rise along the U.S. mid-Atlantic coast. The rate of relative sea-level rise in New Jersey decreased from 3.5 ± 1.0 mm/yr at 7.5–6.5 ka, to 2.2 ± 0.8 mm/yr at 5.5–4.5 ka to a minimum of 0.9 ± 0.4 mm/yr at 3.3–2.3 ka. Relative sea level rose at a rate of 1.6 ± 0.1 mm/yr from 2.2 to 1.2 ka (750 Common Era [CE]) and 1.4 ± 0.1 mm/yr from 800 to 1800 CE. Geological and tide-gauge data show that sea-level rise was more rapid throughout the region since the Industrial Revolution (19th century = 2.7 ± 0.4 mm/yr; 20th century = 3.8 ± 0.2 mm/yr). There is a 95\\% probability that the 20th century rate of sea-level rise was faster than it was in any century in the last 4.3 kyr. These records reflect global rise (∼1.7 ± 0.2 mm/yr since 1880 CE) and subsidence from glacio-isostatic adjustment (∼1.3 ± 0.4 mm/yr) at bedrock locations (e.g., New York City). At coastal plain locations, the rate of rise is 0.3–1.3 mm/yr higher due to groundwater withdrawal and compaction. We construct 21st century relative sea-level rise scenarios including global, regional, and local processes. We project a 22 cm rise at bedrock locations by 2030 (central scenario; low-and high-end scenarios range of 16–38 cm), 40 cm by 2050 (range 28–65 cm), and 96 cm by 2100 (range 66–168 cm), with coastal plain locations having higher rises (3, 5–6, and 10–12 cm higher, respectively). By 2050 CE in the central scenario, a storm with a 10 year recurrence interval will exceed all historic storms at Atlantic City. Summary An analysis of geological and historical sea-level records shows a significant rate of increase in sea-level rise since the nineteenth century. In New Jersey, it is extremely likely that sea-level rise in the twentieth century was faster than during any other century in the last 4.3 thousand years. Accounting for regional and local factors, the authors project sea-level rise in the mid-Atlantic U.S. most likely about 38–42 ′′ (96–106 cm) over the twentieth century, but possibly as high as 66–71 ′′ (168–180 cm).},\n\tnumber = {1},\n\tjournal = {Earth's Future},\n\tauthor = {Miller, Kenneth G and Kopp, Robert E and Horton, Benjamin P and Browning, James V and Kemp, Andrew C},\n\tyear = {2013},\n\tnote = {ISBN: 2328-4277\nPublisher: Wiley Online Library},\n\tkeywords = {10.1002/2013EF000135 and Sea level, Coastal flooding, Mid-Atlantic, Storm tide.},\n\tpages = {3--18},\n}\n\n
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\n We evaluate paleo-, historical, and future sea-level rise along the U.S. mid-Atlantic coast. The rate of relative sea-level rise in New Jersey decreased from 3.5 ± 1.0 mm/yr at 7.5–6.5 ka, to 2.2 ± 0.8 mm/yr at 5.5–4.5 ka to a minimum of 0.9 ± 0.4 mm/yr at 3.3–2.3 ka. Relative sea level rose at a rate of 1.6 ± 0.1 mm/yr from 2.2 to 1.2 ka (750 Common Era [CE]) and 1.4 ± 0.1 mm/yr from 800 to 1800 CE. Geological and tide-gauge data show that sea-level rise was more rapid throughout the region since the Industrial Revolution (19th century = 2.7 ± 0.4 mm/yr; 20th century = 3.8 ± 0.2 mm/yr). There is a 95% probability that the 20th century rate of sea-level rise was faster than it was in any century in the last 4.3 kyr. These records reflect global rise (∼1.7 ± 0.2 mm/yr since 1880 CE) and subsidence from glacio-isostatic adjustment (∼1.3 ± 0.4 mm/yr) at bedrock locations (e.g., New York City). At coastal plain locations, the rate of rise is 0.3–1.3 mm/yr higher due to groundwater withdrawal and compaction. We construct 21st century relative sea-level rise scenarios including global, regional, and local processes. We project a 22 cm rise at bedrock locations by 2030 (central scenario; low-and high-end scenarios range of 16–38 cm), 40 cm by 2050 (range 28–65 cm), and 96 cm by 2100 (range 66–168 cm), with coastal plain locations having higher rises (3, 5–6, and 10–12 cm higher, respectively). By 2050 CE in the central scenario, a storm with a 10 year recurrence interval will exceed all historic storms at Atlantic City. Summary An analysis of geological and historical sea-level records shows a significant rate of increase in sea-level rise since the nineteenth century. In New Jersey, it is extremely likely that sea-level rise in the twentieth century was faster than during any other century in the last 4.3 thousand years. Accounting for regional and local factors, the authors project sea-level rise in the mid-Atlantic U.S. most likely about 38–42 ′′ (96–106 cm) over the twentieth century, but possibly as high as 66–71 ′′ (168–180 cm).\n
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\n \n\n \n \n \n \n \n \n Sea-level change during the last 2500 years in New Jersey, USA.\n \n \n \n \n\n\n \n Kemp, A. C; Horton, B. P; Vane, C. H; Bernhardt, C. E; Corbett, D R.; Engelhart, S. E; Ainsfeld, S. C.; Parnell, A. C; and Chaill, N.\n\n\n \n\n\n\n 2013.\n Pages: 90–104 Publication Title: Quartnary Science Review Volume: 81\n\n\n\n
\n\n\n\n \n \n \"Sea-levelPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@misc{kemp_sea-level_2013,\n\ttitle = {Sea-level change during the last 2500 years in {New} {Jersey}, {USA}},\n\turl = {http://www.whoi.edu/cms/files/Kemp2013QSR{\\_}170144.pdf},\n\tpublisher = {Elsevier},\n\tauthor = {Kemp, Andrew C and Horton, Benjamin P and Vane, Christopher H and Bernhardt, Christopher E and Corbett, D Reide and Engelhart, Simon E and Ainsfeld, Shimon C. and Parnell, Andrew C and Chaill, Niamh},\n\tyear = {2013},\n\tnote = {Pages: 90–104\nPublication Title: Quartnary Science Review\nVolume: 81},\n}\n\n
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\n \n\n \n \n \n \n \n Contribution of relative sea-level rise to historical hurricane flooding in New York City.\n \n \n \n\n\n \n Kemp, A. C; and Horton, B. P\n\n\n \n\n\n\n Journal of Quaternary Science, 28(6): 537–541. 2013.\n ISBN: 1099-1417 Publisher: Wiley Online Library\n\n\n\n
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@article{kemp_contribution_2013,\n\ttitle = {Contribution of relative sea-level rise to historical hurricane flooding in {New} {York} {City}},\n\tvolume = {28},\n\tissn = {02678179},\n\tdoi = {10.1002/jqs.2653},\n\tabstract = {ABSTRACT: Flooding during hurricanes is a hazard for New York City. Flood height is determined by storm surge characteristics, timing (high or low tide) and relative sea-level (RSL) change. The contribution from these factors is estimated for seven historical hurricanes (1788–2012) that caused flooding in New York City. Measurements from The Battery tide gauge and historical accounts are supplemented with a RSL reconstruction from Barnegat Bay, New Jersey. RSL was reconstructed from foraminifera preserved in salt-marsh sediment that was dated using marker horizons of lead and copper pollution and 137Cs activity. Between the 1788 hurricane and Hurricane Sandy in 2012, RSL rose by 56 cm, including 15 cm from glacio-isostatic adjustment. Storm surge characteristics and timing with respect to astronomical tides remain the dominant factors in determining flood height. However, RSL rise will raise the base level for flood heights in New York City and exacerbate flooding caused by future hurricanes.},\n\tnumber = {6},\n\tjournal = {Journal of Quaternary Science},\n\tauthor = {Kemp, Andrew C and Horton, Benjamin P},\n\tyear = {2013},\n\tnote = {ISBN: 1099-1417\nPublisher: Wiley Online Library},\n\tkeywords = {Hurricane Sandy, New Jersey, Salt marsh, Storm surge, Tide gauge},\n\tpages = {537--541},\n}\n\n
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\n ABSTRACT: Flooding during hurricanes is a hazard for New York City. Flood height is determined by storm surge characteristics, timing (high or low tide) and relative sea-level (RSL) change. The contribution from these factors is estimated for seven historical hurricanes (1788–2012) that caused flooding in New York City. Measurements from The Battery tide gauge and historical accounts are supplemented with a RSL reconstruction from Barnegat Bay, New Jersey. RSL was reconstructed from foraminifera preserved in salt-marsh sediment that was dated using marker horizons of lead and copper pollution and 137Cs activity. Between the 1788 hurricane and Hurricane Sandy in 2012, RSL rose by 56 cm, including 15 cm from glacio-isostatic adjustment. Storm surge characteristics and timing with respect to astronomical tides remain the dominant factors in determining flood height. However, RSL rise will raise the base level for flood heights in New York City and exacerbate flooding caused by future hurricanes.\n
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\n \n\n \n \n \n \n \n Influence of tidal-range change and sediment compaction on Holocene relative sea-level change in New Jersey, USA.\n \n \n \n\n\n \n Horton, B. P; Engelhart, S. E; Hill, D. F; Kemp, A. C; Nikitina, D.; Miller, K. G; and Peltier, W R.\n\n\n \n\n\n\n Journal of Quaternary Science, 28(4): 403–411. 2013.\n ISBN: 1099-1417 Publisher: Wiley Online Library\n\n\n\n
\n\n\n\n \n\n \n \n doi\n  \n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n \n \n \n \n \n \n \n \n \n \n\n\n\n
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@article{horton_influence_2013,\n\ttitle = {Influence of tidal-range change and sediment compaction on {Holocene} relative sea-level change in {New} {Jersey}, {USA}},\n\tvolume = {28},\n\tissn = {02678179},\n\tdoi = {10.1002/jqs.2634},\n\tabstract = {We investigated the effect of tidal-range change and sediment compaction on reconstructions of Holocene relative sea level (RSL) in New Jersey, USA. We updated a published sea-level database to generate 50 sea-level index points and ten limiting dates that define continuously rising RSL in New Jersey during the Holocene. There is scatter among the index points, particularly those older than 7 ka. A numerical model estimated that paleotidal range was relatively constant during the mid and late Holocene, but rapidly increased between 9 and 8 ka, leading to an underestimation of RSL by ∼0.5 m. We adjusted the sea-level index points using the paleotidal model prior to assessing the influence of compaction on organic samples with clastic deposits above and below (an intercalated sea-level index point). We found a significant relationship (p = 0.01) with the thickness of the overburden (r = 0.85). We altered the altitude of intercalated index points using this simple stratigraphic relationship, which reduced vertical scatter in sea-level reconstructions. We conclude that RSL rose at an average rate of 4 mm a−1 from 10 ka to 6 ka, 2 mm a−1 from 6 ka to 2 ka, and 1.3 mm a−1 from 2 ka to AD 1900. Copyright © 2013 John Wiley \\& Sons, Ltd.},\n\tnumber = {4},\n\tjournal = {Journal of Quaternary Science},\n\tauthor = {Horton, Benjamin P and Engelhart, Simon E and Hill, David F and Kemp, Andrew C and Nikitina, Daria and Miller, Kenneth G and Peltier, W Richard},\n\tyear = {2013},\n\tnote = {ISBN: 1099-1417\nPublisher: Wiley Online Library},\n\tkeywords = {Holocene, Index points, Sea level, Sediment compaction, Tidal range},\n\tpages = {403--411},\n}\n\n
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\n We investigated the effect of tidal-range change and sediment compaction on reconstructions of Holocene relative sea level (RSL) in New Jersey, USA. We updated a published sea-level database to generate 50 sea-level index points and ten limiting dates that define continuously rising RSL in New Jersey during the Holocene. There is scatter among the index points, particularly those older than 7 ka. A numerical model estimated that paleotidal range was relatively constant during the mid and late Holocene, but rapidly increased between 9 and 8 ka, leading to an underestimation of RSL by ∼0.5 m. We adjusted the sea-level index points using the paleotidal model prior to assessing the influence of compaction on organic samples with clastic deposits above and below (an intercalated sea-level index point). We found a significant relationship (p = 0.01) with the thickness of the overburden (r = 0.85). We altered the altitude of intercalated index points using this simple stratigraphic relationship, which reduced vertical scatter in sea-level reconstructions. We conclude that RSL rose at an average rate of 4 mm a−1 from 10 ka to 6 ka, 2 mm a−1 from 6 ka to 2 ka, and 1.3 mm a−1 from 2 ka to AD 1900. Copyright © 2013 John Wiley & Sons, Ltd.\n
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\n \n\n \n \n \n \n \n Links between early Holocene ice-sheet decay, sea-level rise and abrupt climate change.\n \n \n \n\n\n \n Törnqvist, T. E; and Hijma, M. P\n\n\n \n\n\n\n Nature Geoscience, 5(9): 601–606. 2012.\n Publisher: Nature Research\n\n\n\n
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@article{tornqvist_links_2012,\n\ttitle = {Links between early {Holocene} ice-sheet decay, sea-level rise and abrupt climate change},\n\tvolume = {5},\n\tnumber = {9},\n\tjournal = {Nature Geoscience},\n\tauthor = {Törnqvist, Torbjörn E and Hijma, Marc P},\n\tyear = {2012},\n\tnote = {Publisher: Nature Research},\n\tpages = {601--606},\n}\n\n
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\n \n\n \n \n \n \n \n Deglacial rapid sea level rises caused by ice-sheet saddle collapses.\n \n \n \n\n\n \n Gregoire, L. J; Payne, A. J; and Valdes, P. J\n\n\n \n\n\n\n Nature, 487(7406): 219–222. 2012.\n ISBN: 0028-0836 Publisher: Nature Research\n\n\n\n
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@article{gregoire_deglacial_2012,\n\ttitle = {Deglacial rapid sea level rises caused by ice-sheet saddle collapses},\n\tvolume = {487},\n\tissn = {00280836},\n\tdoi = {10.1038/nature11257},\n\tabstract = {The last deglaciation (21 to 7 thousand years ago) was punctuated by several abrupt meltwater pulses, which sometimes caused noticeable climate change. Around 14 thousand years ago, meltwater pulse 1A (MWP-1A), the largest of these events, produced a sea level rise of 14-18 metres over 350 years. Although this enormous surge of water certainly originated from retreating ice sheets, there is no consensus on the geographical source or underlying physical mechanisms governing the rapid sea level rise. Here we present an ice-sheet modelling simulation in which the separation of the Laurentide and Cordilleran ice sheets in North America produces a meltwater pulse corresponding to MWP-1A. Another meltwater pulse is produced when the Labrador and Baffin ice domes around Hudson Bay separate, which could be associated with the '8,200-year' event, the most pronounced abrupt climate event of the past nine thousand years. For both modelled pulses, the saddle between the two ice domes becomes subject to surface melting because of a general surface lowering caused by climate warming. The melting then rapidly accelerates as the saddle between the two domes gets lower, producing nine metres of sea level rise over 500 years. This mechanism of an ice 'saddle collapse' probably explains MWP-1A and the 8,200-year event and sheds light on the consequences of these events on climate.},\n\tnumber = {7406},\n\tjournal = {Nature},\n\tauthor = {Gregoire, Lauren J and Payne, Antony J and Valdes, Paul J},\n\tyear = {2012},\n\tpmid = {22785319},\n\tnote = {ISBN: 0028-0836\nPublisher: Nature Research},\n\tpages = {219--222},\n}\n\n
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\n The last deglaciation (21 to 7 thousand years ago) was punctuated by several abrupt meltwater pulses, which sometimes caused noticeable climate change. Around 14 thousand years ago, meltwater pulse 1A (MWP-1A), the largest of these events, produced a sea level rise of 14-18 metres over 350 years. Although this enormous surge of water certainly originated from retreating ice sheets, there is no consensus on the geographical source or underlying physical mechanisms governing the rapid sea level rise. Here we present an ice-sheet modelling simulation in which the separation of the Laurentide and Cordilleran ice sheets in North America produces a meltwater pulse corresponding to MWP-1A. Another meltwater pulse is produced when the Labrador and Baffin ice domes around Hudson Bay separate, which could be associated with the '8,200-year' event, the most pronounced abrupt climate event of the past nine thousand years. For both modelled pulses, the saddle between the two ice domes becomes subject to surface melting because of a general surface lowering caused by climate warming. The melting then rapidly accelerates as the saddle between the two domes gets lower, producing nine metres of sea level rise over 500 years. This mechanism of an ice 'saddle collapse' probably explains MWP-1A and the 8,200-year event and sheds light on the consequences of these events on climate.\n
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\n \n\n \n \n \n \n \n \n Ice Volume and Sea Level During the Last Interglacial.\n \n \n \n \n\n\n \n Dutton, A.; and Lambeck, K.\n\n\n \n\n\n\n Science, 337(6091): 216–219. 2012.\n ISBN: 1095-9203 (Electronic)\\backslashr0036-8075 (Linking)\n\n\n\n
\n\n\n\n \n \n \"IcePaper\n  \n \n\n \n \n doi\n  \n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n  \n \n 1 download\n \n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{dutton_ice_2012,\n\ttitle = {Ice {Volume} and {Sea} {Level} {During} the {Last} {Interglacial}},\n\tvolume = {337},\n\tissn = {0036-8075},\n\turl = {http://www.sciencemag.org/cgi/doi/10.1126/science.1205749},\n\tdoi = {10.1126/science.1205749},\n\tabstract = {During the last interglacial period, ∼125,000 years ago, sea level was at least several meters higher than at present, with substantial variability observed for peak sea level at geographically diverse sites. Speculation that the West Antarctic ice sheet collapsed during the last interglacial period has drawn particular interest to understanding climate and ice-sheet dynamics during this time interval. We provide an internally consistent database of coral U-Th ages to assess last interglacial sea-level observations in the context of isostatic modeling and stratigraphic evidence. These data indicate that global (eustatic) sea level peaked 5.5 to 9 meters above present sea level, requiring smaller ice sheets in both Greenland and Antarctica relative to today and indicating strong sea-level sensitivity to small changes in radiative forcing.},\n\tnumber = {6091},\n\tjournal = {Science},\n\tauthor = {Dutton, Andrea and Lambeck, Kurt},\n\tyear = {2012},\n\tpmid = {22798610},\n\tnote = {ISBN: 1095-9203 (Electronic){\\textbackslash}backslashr0036-8075 (Linking)},\n\tpages = {216--219},\n}\n\n
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\n During the last interglacial period, ∼125,000 years ago, sea level was at least several meters higher than at present, with substantial variability observed for peak sea level at geographically diverse sites. Speculation that the West Antarctic ice sheet collapsed during the last interglacial period has drawn particular interest to understanding climate and ice-sheet dynamics during this time interval. We provide an internally consistent database of coral U-Th ages to assess last interglacial sea-level observations in the context of isostatic modeling and stratigraphic evidence. These data indicate that global (eustatic) sea level peaked 5.5 to 9 meters above present sea level, requiring smaller ice sheets in both Greenland and Antarctica relative to today and indicating strong sea-level sensitivity to small changes in radiative forcing.\n
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\n \n\n \n \n \n \n \n Quantitative vertical zonation of salt-marsh foraminifera for reconstructing former sea level; an example from New Jersey, USA.\n \n \n \n\n\n \n Kemp, A. C; Horton, B. P; Vann, D. R; Engelhart, S. E; Grand Pre, C. A.; Vane, C. H; Nikitina, D.; and Anisfeld, S. C\n\n\n \n\n\n\n Quaternary Science Reviews, 54: 26–39. 2012.\n ISBN: 02773791 (ISSN) Publisher: Elsevier\n\n\n\n
\n\n\n\n \n\n \n \n doi\n  \n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n\n\n\n
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@article{kemp_quantitative_2012,\n\ttitle = {Quantitative vertical zonation of salt-marsh foraminifera for reconstructing former sea level; an example from {New} {Jersey}, {USA}},\n\tvolume = {54},\n\tissn = {02773791},\n\tdoi = {10.1016/j.quascirev.2011.09.014},\n\tabstract = {We present a quantitative technique to reconstruct sea level from assemblages of salt-marsh foraminifera using partitioning around medoids (PAM) and linear discriminant functions (LDF). The modern distribution of foraminifera was described from 62 surface samples at three salt marshes in southern New Jersey. PAM objectively estimated the number and composition of assemblages present at each site and showed that foraminifera adhered to the concept of elevation-dependent ecological zones, making them appropriate sea-level indicators. Application of PAM to a combined dataset identified five distinctive biozones occupying defined elevation ranges, which were similar to those identified elsewhere on the U.S. mid-Atlantic coast. Biozone A had high abundances of Jadammina macrescens and Trochammina inflata; biozone B was dominated by Miliammina fusca; biozone C was associated with Arenoparrella mexicana; biozone D was dominated by Tiphotrocha comprimata and biozone E was dominated by Haplophragmoides manilaensis. Foraminiferal assemblages from transitional and high salt-marsh environments occupied the narrowest elevational range and are the most precise sea-level indicators. Recognition of biozones in sequences of salt-marsh sediment using LDFs provides a probabilistic means to reconstruct sea level. We collected a core to investigate the practical application of this approach. LDFs indicated the faunal origin of 38 core samples and in cross-validation tests were accurate in 54 of 56 cases. We compared reconstructions from LDFs and a transfer function. The transfer function provides smaller error terms and can reconstruct smaller RSL changes, but LDFs are well suited to RSL reconstructions focused on larger changes and using varied assemblages. Agreement between these techniques suggests that the approach we describe can be used as an independent means to reconstruct sea level or, importantly, to check the ecological plausibility of results from other techniques. © 2011 Elsevier Ltd.},\n\tjournal = {Quaternary Science Reviews},\n\tauthor = {Kemp, Andrew C and Horton, Benjamin P and Vann, David R and Engelhart, Simon E and Grand Pre, Candace A. and Vane, Christopher H and Nikitina, Daria and Anisfeld, Shimon C},\n\tyear = {2012},\n\tnote = {ISBN: 02773791 (ISSN)\nPublisher: Elsevier},\n\tkeywords = {Cluster analysis, Discriminant function, Foraminifera, New Jersey, Quantitative paleoenvironmental reconstruction, Salt marsh, Sea level},\n\tpages = {26--39},\n}\n\n
\n
\n\n\n
\n We present a quantitative technique to reconstruct sea level from assemblages of salt-marsh foraminifera using partitioning around medoids (PAM) and linear discriminant functions (LDF). The modern distribution of foraminifera was described from 62 surface samples at three salt marshes in southern New Jersey. PAM objectively estimated the number and composition of assemblages present at each site and showed that foraminifera adhered to the concept of elevation-dependent ecological zones, making them appropriate sea-level indicators. Application of PAM to a combined dataset identified five distinctive biozones occupying defined elevation ranges, which were similar to those identified elsewhere on the U.S. mid-Atlantic coast. Biozone A had high abundances of Jadammina macrescens and Trochammina inflata; biozone B was dominated by Miliammina fusca; biozone C was associated with Arenoparrella mexicana; biozone D was dominated by Tiphotrocha comprimata and biozone E was dominated by Haplophragmoides manilaensis. Foraminiferal assemblages from transitional and high salt-marsh environments occupied the narrowest elevational range and are the most precise sea-level indicators. Recognition of biozones in sequences of salt-marsh sediment using LDFs provides a probabilistic means to reconstruct sea level. We collected a core to investigate the practical application of this approach. LDFs indicated the faunal origin of 38 core samples and in cross-validation tests were accurate in 54 of 56 cases. We compared reconstructions from LDFs and a transfer function. The transfer function provides smaller error terms and can reconstruct smaller RSL changes, but LDFs are well suited to RSL reconstructions focused on larger changes and using varied assemblages. Agreement between these techniques suggests that the approach we describe can be used as an independent means to reconstruct sea level or, importantly, to check the ecological plausibility of results from other techniques. © 2011 Elsevier Ltd.\n
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\n \n\n \n \n \n \n \n \n Holocene sea level database for the Atlantic coast of the United States.\n \n \n \n \n\n\n \n Engelhart, S.; and Horton, B.\n\n\n \n\n\n\n Quaternary Science Reviews, 54: 12–25. 2012.\n Publisher: Elsevier Ltd\n\n\n\n
\n\n\n\n \n \n \"HolocenePaper\n  \n \n\n \n \n doi\n  \n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{engelhart_holocene_2012,\n\ttitle = {Holocene sea level database for the {Atlantic} coast of the {United} {States}},\n\tvolume = {54},\n\tissn = {02773791},\n\turl = {http://linkinghub.elsevier.com/retrieve/pii/S0277379111002927 papers2://publication/doi/10.1016/j.quascirev.2011.09.013},\n\tdoi = {10.1016/j.quascirev.2011.09.013},\n\tabstract = {We have constructed a database of Holocene relative sea level (RSL) observations for the Atlantic coast of the United States. The database contains 492 index points, which locate the position of RSL in time and space, and 344 limiting dates, which constrain the minimum or maximum limit of former sea level. The majority of the index points in the database are from 6 ka BP to present, with only 7\\% older than 6 ka BP. Spatially, index points are distributed between Maine and South Carolina, but there is an absence of data from Georgia and the Atlantic coast of Florida.The database is sub-divided into 16 regions based on the distance from the former Laurentide Ice Sheet and are classified depending upon their susceptibility to compaction. The index points and limiting data demonstrate that RSL did not exceed present (0 m) during the Holocene except potentially in regions 1 and 2 (Eastern Maine and Southern Maine). Rates of RSL change were highest during the early Holocene and have decreased over time, due to the diminishing response of the Earth's mantle to glacial isostatic adjustment and reduction of ice equivalent meltwater input. Along the Atlantic coast of the United States the linear rate of RSL rise prior to 4 ka BP ranged from 0.5 to 4.5 mm a -1, compared to 0.6-1.8 mm a -1 from 4 ka BP to AD 1900. The database suggests minimal ({\\textbackslash}textless0.3 mm/yr) changes in these rates of RSL rise during the late Holocene. Deglaciation of the Laurentide Ice Sheet caused the spatial variability captured by the database. The maximum rate of late Holocene (and ongoing) RSL rise occurred in mid-Atlantic regions (New Jersey and Inner Delaware) because of collapse of the peripheral forebulge. © 2011 Elsevier Ltd.},\n\tjournal = {Quaternary Science Reviews},\n\tauthor = {Engelhart, S.E. and Horton, B.P.},\n\tyear = {2012},\n\tnote = {Publisher: Elsevier Ltd},\n\tpages = {12--25},\n}\n\n
\n
\n\n\n
\n We have constructed a database of Holocene relative sea level (RSL) observations for the Atlantic coast of the United States. The database contains 492 index points, which locate the position of RSL in time and space, and 344 limiting dates, which constrain the minimum or maximum limit of former sea level. The majority of the index points in the database are from 6 ka BP to present, with only 7% older than 6 ka BP. Spatially, index points are distributed between Maine and South Carolina, but there is an absence of data from Georgia and the Atlantic coast of Florida.The database is sub-divided into 16 regions based on the distance from the former Laurentide Ice Sheet and are classified depending upon their susceptibility to compaction. The index points and limiting data demonstrate that RSL did not exceed present (0 m) during the Holocene except potentially in regions 1 and 2 (Eastern Maine and Southern Maine). Rates of RSL change were highest during the early Holocene and have decreased over time, due to the diminishing response of the Earth's mantle to glacial isostatic adjustment and reduction of ice equivalent meltwater input. Along the Atlantic coast of the United States the linear rate of RSL rise prior to 4 ka BP ranged from 0.5 to 4.5 mm a -1, compared to 0.6-1.8 mm a -1 from 4 ka BP to AD 1900. The database suggests minimal (\\textless0.3 mm/yr) changes in these rates of RSL rise during the late Holocene. Deglaciation of the Laurentide Ice Sheet caused the spatial variability captured by the database. The maximum rate of late Holocene (and ongoing) RSL rise occurred in mid-Atlantic regions (New Jersey and Inner Delaware) because of collapse of the peripheral forebulge. © 2011 Elsevier Ltd.\n
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\n \n\n \n \n \n \n \n \n Where might we find evidence of a Last Interglacial West Antarctic Ice Sheet collapse in Antarctic ice core records?.\n \n \n \n \n\n\n \n Bradley, S L; Siddall, M; Milne, G A; Masson-Delmotte, V.; and Wolff, E\n\n\n \n\n\n\n Global and Planetary Change, 88-89: 64–75. 2012.\n ISBN: 0921-8181 Publisher: Elsevier _eprint: D15109\n\n\n\n
\n\n\n\n \n \n \"WherePaper\n  \n \n\n \n \n doi\n  \n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n \n \n \n \n \n \n \n \n \n \n\n\n\n
\n
@article{bradley_where_2012,\n\ttitle = {Where might we find evidence of a {Last} {Interglacial} {West} {Antarctic} {Ice} {Sheet} collapse in {Antarctic} ice core records?},\n\tvolume = {88-89},\n\tissn = {09218181},\n\turl = {http://dx.doi.org/10.1016/j.gloplacha.2012.03.004},\n\tdoi = {10.1016/j.gloplacha.2012.03.004},\n\tabstract = {Abundant indirect evidence suggests that the West Antarctic Ice Sheet (WAIS) reduced in size during the Last Interglacial (LIG) compared to the Holocene. This study explores this possibility by comparing, for the first time, ice core stable isotope records for the LIG with output from a glacio-isostatic adjustment (GIA) model. The results show that ice core records from East Antarctica are remarkably insensitive to vertical movement of the solid land motion driven by a simulated hypothetical collapse of the WAIS. However, new and so far unexplored sites are identified which are sensitive to the isostatic signal associated with WAIS collapse and so ice core proxy data from these sites would be effective in testing this hypothesis further. © 2012 Elsevier B.V.},\n\tjournal = {Global and Planetary Change},\n\tauthor = {Bradley, S L and Siddall, M and Milne, G A and Masson-Delmotte, V. and Wolff, E},\n\tyear = {2012},\n\tpmid = {23151478},\n\tnote = {ISBN: 0921-8181\nPublisher: Elsevier\n\\_eprint: D15109},\n\tkeywords = {Antarctic Ice Sheet, Eustatic sea level, Ice cores, Isostasy, Last Interglacial},\n\tpages = {64--75},\n}\n\n
\n
\n\n\n
\n Abundant indirect evidence suggests that the West Antarctic Ice Sheet (WAIS) reduced in size during the Last Interglacial (LIG) compared to the Holocene. This study explores this possibility by comparing, for the first time, ice core stable isotope records for the LIG with output from a glacio-isostatic adjustment (GIA) model. The results show that ice core records from East Antarctica are remarkably insensitive to vertical movement of the solid land motion driven by a simulated hypothetical collapse of the WAIS. However, new and so far unexplored sites are identified which are sensitive to the isostatic signal associated with WAIS collapse and so ice core proxy data from these sites would be effective in testing this hypothesis further. © 2012 Elsevier B.V.\n
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\n \n\n \n \n \n \n \n \n Exploring uncertainties in the relationship between temperature, ice volume, and sea level over the past 50 million years.\n \n \n \n \n\n\n \n Gasson, E.; Siddall, M.; Lunt, D. J; Rackham, O. J L; Lear, C. H; and Pollard, D.\n\n\n \n\n\n\n Reviews of Geophysics, 50(1): RG1005. 2012.\n ISBN: 8755-1209 Publisher: Wiley Online Library\n\n\n\n
\n\n\n\n \n \n \"ExploringPaper\n  \n \n\n \n \n doi\n  \n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{gasson_exploring_2012,\n\ttitle = {Exploring uncertainties in the relationship between temperature, ice volume, and sea level over the past 50 million years},\n\tvolume = {50},\n\tissn = {8755-1209},\n\turl = {http://doi.wiley.com/10.1029/2011RG000358},\n\tdoi = {10.1029/2011RG000358},\n\tabstract = {Over the past decade, efforts to estimate temperature and sea level for the past 50 Ma have increased. In parallel, efforts to model ice sheet changes during this period have been ongoing. We review published paleodata and modeling work to provide insights into how sea level responds to changing temperature through changes in ice volume and thermal expansion. To date, the temperature to sea level relationship has been explored for the transition from glacial to interglacial states. Attempts to synthesize the temperature to sea level relationship in deeper time, when temperatures were significantly warmer than present, have been tentative. We first review the existing temperature and sea level data and model simulations, with a discussion of uncertainty in each of these approaches. We then synthesize the sea level and temperature data and modeling results we have reviewed to test plausible forms for the sea level versus temperature relationship. On this very long timescale there are no globally representative temperature proxies, and so we investigate this relationship using deep-sea temperature records and surface temperature records from high and low latitudes. It is difficult to distinguish between the different plausible forms of the temperature to sea level relationship given the wide errors associated with the proxy estimates. We argue that for surface high-latitude Southern Hemisphere temperature and deep-sea temperature, the rate of change of sea level to temperature has not remained constant, i.e., linear, over the past 50 Ma, although the relationship remains ambiguous for the available low-latitude surface temperature data. A nonlinear form between temperature and sea level is consistent with ice sheet modeling studies. This relationship can be attributed to (1) the different glacial thresholds for Southern Hemisphere glaciation compared to Northern Hemisphere glaciation and (2) the ice sheet carrying capacity of the Antarctic continent.},\n\tnumber = {1},\n\tjournal = {Reviews of Geophysics},\n\tauthor = {Gasson, Edward and Siddall, Mark and Lunt, Daniel J and Rackham, Owen J L and Lear, Caroline H and Pollard, David},\n\tyear = {2012},\n\tnote = {ISBN: 8755-1209\nPublisher: Wiley Online Library},\n\tpages = {RG1005},\n}\n\n
\n
\n\n\n
\n Over the past decade, efforts to estimate temperature and sea level for the past 50 Ma have increased. In parallel, efforts to model ice sheet changes during this period have been ongoing. We review published paleodata and modeling work to provide insights into how sea level responds to changing temperature through changes in ice volume and thermal expansion. To date, the temperature to sea level relationship has been explored for the transition from glacial to interglacial states. Attempts to synthesize the temperature to sea level relationship in deeper time, when temperatures were significantly warmer than present, have been tentative. We first review the existing temperature and sea level data and model simulations, with a discussion of uncertainty in each of these approaches. We then synthesize the sea level and temperature data and modeling results we have reviewed to test plausible forms for the sea level versus temperature relationship. On this very long timescale there are no globally representative temperature proxies, and so we investigate this relationship using deep-sea temperature records and surface temperature records from high and low latitudes. It is difficult to distinguish between the different plausible forms of the temperature to sea level relationship given the wide errors associated with the proxy estimates. We argue that for surface high-latitude Southern Hemisphere temperature and deep-sea temperature, the rate of change of sea level to temperature has not remained constant, i.e., linear, over the past 50 Ma, although the relationship remains ambiguous for the available low-latitude surface temperature data. A nonlinear form between temperature and sea level is consistent with ice sheet modeling studies. This relationship can be attributed to (1) the different glacial thresholds for Southern Hemisphere glaciation compared to Northern Hemisphere glaciation and (2) the ice sheet carrying capacity of the Antarctic continent.\n
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\n \n\n \n \n \n \n \n \n Ice-sheet sources of sea-level rise and freshwater discharge during the last deglaciation.\n \n \n \n \n\n\n \n Carlson, A. E; and Clark, P. U\n\n\n \n\n\n\n Reviews of Geophysics, 50(2011): 1–72. 2012.\n ISBN: 8755-1209 Publisher: Wiley Online Library\n\n\n\n
\n\n\n\n \n \n \"Ice-sheetPaper\n  \n \n\n \n \n doi\n  \n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n \n \n \n \n \n \n \n \n \n \n\n\n\n
\n
@article{carlson_ice-sheet_2012,\n\ttitle = {Ice-sheet sources of sea-level rise and freshwater discharge during the last deglaciation},\n\tvolume = {50},\n\tissn = {8755-1209},\n\turl = {citeulike-article-id:11698396{\\%}5Cnhttp://dx.doi.org/10.1029/2011rg000371},\n\tdoi = {doi: 10.1029/2011rg000371},\n\tabstract = {We review and synthesize the geologic record that constrains the sources of sea level rise and freshwater dis- charge to the global oceans associated with retreat of ice sheets during the last deglaciation. The Last Glacial Maxi- mum (\\vphantom{\\{}\\}26–19 ka) was terminated by a rapid 5–10 m sea level rise at 19.0–19.5 ka, sourced largely from Northern Hemisphere ice sheet retreat in response to high northern lat- itude insolation forcing. Sea level rise of 8–20mfrom\\vphantom{\\{}\\}19 to 14.5 ka can be attributed to continued retreat of the Lauren- tide and Eurasian Ice Sheets, with an additional freshwater forcing of uncertain amount delivered by Heinrich event 1. The source of the abrupt acceleration in sea level rise at \\vphantom{\\{}\\}14.6 ka (meltwater pulse 1A, \\vphantom{\\{}\\}14–15 m) includes contri- butions of 6.5–10 m from Northern Hemisphere ice sheets, of which 2–7 m represents an excess contribution above that derived from ongoing ice sheet retreat. Widespread retreat of Antarctic ice sheets began at 14.0–15.0 ka, which, together with geophysical modeling of far-field sea level records, sug- gests an Antarctic contribution to this meltwater pulse as well. The cause of the subsequent Younger Dryas cold event can be attributed to eastward freshwater runoff from the Lake Agassiz basin to the St. Lawrence estuary that agrees with existing Lake Agassiz outlet radiocarbon dates. Much of the early Holocene sea level rise can be explained by Laurentide and Scandinavian Ice Sheet retreat, with collapse of Lauren- tide ice over Hudson Bay and drainage of Lake Agassiz basin runoff at \\$8.4–8.2 ka to the Labrador Sea causing the 8.2 ka event.},\n\tnumber = {2011},\n\tjournal = {Reviews of Geophysics},\n\tauthor = {Carlson, Anders E and Clark, Peter U},\n\tyear = {2012},\n\tnote = {ISBN: 8755-1209\nPublisher: Wiley Online Library},\n\tkeywords = {deglaciation, ice sheets, ice\\_sheet, sea level, sea\\_level\\_change},\n\tpages = {1--72},\n}\n\n
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\n We review and synthesize the geologic record that constrains the sources of sea level rise and freshwater dis- charge to the global oceans associated with retreat of ice sheets during the last deglaciation. The Last Glacial Maxi- mum (p̌hantom\\\\26–19 ka) was terminated by a rapid 5–10 m sea level rise at 19.0–19.5 ka, sourced largely from Northern Hemisphere ice sheet retreat in response to high northern lat- itude insolation forcing. Sea level rise of 8–20mfromp̌hantom\\\\19 to 14.5 ka can be attributed to continued retreat of the Lauren- tide and Eurasian Ice Sheets, with an additional freshwater forcing of uncertain amount delivered by Heinrich event 1. The source of the abrupt acceleration in sea level rise at p̌hantom\\\\14.6 ka (meltwater pulse 1A, p̌hantom\\\\14–15 m) includes contri- butions of 6.5–10 m from Northern Hemisphere ice sheets, of which 2–7 m represents an excess contribution above that derived from ongoing ice sheet retreat. Widespread retreat of Antarctic ice sheets began at 14.0–15.0 ka, which, together with geophysical modeling of far-field sea level records, sug- gests an Antarctic contribution to this meltwater pulse as well. The cause of the subsequent Younger Dryas cold event can be attributed to eastward freshwater runoff from the Lake Agassiz basin to the St. Lawrence estuary that agrees with existing Lake Agassiz outlet radiocarbon dates. Much of the early Holocene sea level rise can be explained by Laurentide and Scandinavian Ice Sheet retreat, with collapse of Lauren- tide ice over Hudson Bay and drainage of Lake Agassiz basin runoff at $8.4–8.2 ka to the Labrador Sea causing the 8.2 ka event.\n
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\n \n\n \n \n \n \n \n Uncertainties in elevation changes and their impact on Antarctic temperature records since the end of the last glacial period.\n \n \n \n\n\n \n Siddall, M.; Milne, G. A; and Masson-Delmotte, V.\n\n\n \n\n\n\n Earth and Planetary Science Letters, 315-316: 12–23. 2012.\n ISBN: 0012821X Publisher: Elsevier\n\n\n\n
\n\n\n\n \n\n \n \n doi\n  \n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n \n \n \n \n \n \n \n \n \n \n\n\n\n
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@article{siddall_uncertainties_2012,\n\ttitle = {Uncertainties in elevation changes and their impact on {Antarctic} temperature records since the end of the last glacial period},\n\tvolume = {315-316},\n\tissn = {0012821X},\n\tdoi = {10.1016/j.epsl.2011.04.032},\n\tabstract = {This study presents a sensitivity analysis considering the influence of elevation changes associated with both ice thickness and land height changes on water stable isotope temperature proxies from Antarctic ice cores. We compare results from three different ice sheet models and three different Earth viscosity models at a 10 ice core sites. As expected, the ice-thinning signal at West Antarctic sites is the largest contributor to elevation-induced temperature changes. The signal predicted by the ice models considered produced 100-200\\% of the total glacial to interglacial signal in δD, indicating that the deglacial ice thinning is overestimated by an amount approaching an order of magnitude at some locations. This indicates that the total volume loss in these models is considerably overestimated. Furthermore, the predicted rate of this change is not supported by the isotope data and so, again, most likely reflects inaccuracies in the adopted ice models. Estimates of contemporary ice mass changes inferred from satellite gravity data corrected using any of these models with therefore be biased as a result. The isostatic signal acts to reduce the total elevation change at most sites and has a relatively small magnitude (a few\\% to ∼ 20\\% of that due to the ice thickness change) so is secondary at most sites and for most of the time. However, our results indicate that it could be the dominant control on elevation at some West Antarctic sites during the Holocene, resulting in a secular cooling signal of ∼ 10-20‰ in δD. None of the models capture the Holocene isotopic depletion trend present at several sites in East Antarctica. © 2011 Elsevier B.V.},\n\tjournal = {Earth and Planetary Science Letters},\n\tauthor = {Siddall, Mark and Milne, Glenn A and Masson-Delmotte, Valérie},\n\tyear = {2012},\n\tnote = {ISBN: 0012821X\nPublisher: Elsevier},\n\tkeywords = {Antarctica, Ice cores, Ice sheet, Isostasy, Termination},\n\tpages = {12--23},\n}\n\n
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\n This study presents a sensitivity analysis considering the influence of elevation changes associated with both ice thickness and land height changes on water stable isotope temperature proxies from Antarctic ice cores. We compare results from three different ice sheet models and three different Earth viscosity models at a 10 ice core sites. As expected, the ice-thinning signal at West Antarctic sites is the largest contributor to elevation-induced temperature changes. The signal predicted by the ice models considered produced 100-200% of the total glacial to interglacial signal in δD, indicating that the deglacial ice thinning is overestimated by an amount approaching an order of magnitude at some locations. This indicates that the total volume loss in these models is considerably overestimated. Furthermore, the predicted rate of this change is not supported by the isotope data and so, again, most likely reflects inaccuracies in the adopted ice models. Estimates of contemporary ice mass changes inferred from satellite gravity data corrected using any of these models with therefore be biased as a result. The isostatic signal acts to reduce the total elevation change at most sites and has a relatively small magnitude (a few% to ∼ 20% of that due to the ice thickness change) so is secondary at most sites and for most of the time. However, our results indicate that it could be the dominant control on elevation at some West Antarctic sites during the Holocene, resulting in a secular cooling signal of ∼ 10-20‰ in δD. None of the models capture the Holocene isotopic depletion trend present at several sites in East Antarctica. © 2011 Elsevier B.V.\n
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\n \n\n \n \n \n \n \n Crowdsourcing in the Quaternary sea level community: Insights from the Pliocene.\n \n \n \n\n\n \n Rovere, A.; Raymo, M. E; O'Leary, M J; and Hearty, P. J\n\n\n \n\n\n\n Quaternary Science Reviews, 56: 164–166. 2012.\n ISBN: 0277-3791 Publisher: Elsevier\n\n\n\n
\n\n\n\n \n\n \n \n doi\n  \n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n \n \n \n \n \n \n\n\n\n
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@article{rovere_crowdsourcing_2012,\n\ttitle = {Crowdsourcing in the {Quaternary} sea level community: {Insights} from the {Pliocene}},\n\tvolume = {56},\n\tissn = {02773791},\n\tdoi = {10.1016/j.quascirev.2012.09.014},\n\tabstract = {In order to establish the 'fingerprint' of past sea level changes, many field measurements of paleo sea level from globally distributed locations are needed. It is because this problem requires a geographically expansive database that it becomes an ideal candidate for crowdsourcing techniques. In order to crowdsource sea level data from the Mid-Pliocene Warm Period, we developed three tools: PlioWiki, RSLcalcand RSLmap. PlioWiki is a web portal, open to contributions, where investigators can share knowledge on Pliocene to Quaternary relative sea levels. RSLcalcis a standardized, ready-to-use tool for field geologists to log their own sea level field observations and, if they desire, submit new data to an open access database of relative sea level markers. RSLmapallows one to visualize and query the database built with RSLcalcon a Google Map interface. Here we describe these tools and discuss the advantages of crowdsourcing, relative to traditional approaches, for the creation of sea level databases for any time period. © 2012 Elsevier Ltd.},\n\tjournal = {Quaternary Science Reviews},\n\tauthor = {Rovere, Alessio and Raymo, Maureen E and O'Leary, M J and Hearty, Paul J},\n\tyear = {2012},\n\tnote = {ISBN: 0277-3791\nPublisher: Elsevier},\n\tkeywords = {Crowdsourcing, Plio-Quaternary sea levels, RSL databases},\n\tpages = {164--166},\n}\n\n
\n
\n\n\n
\n In order to establish the 'fingerprint' of past sea level changes, many field measurements of paleo sea level from globally distributed locations are needed. It is because this problem requires a geographically expansive database that it becomes an ideal candidate for crowdsourcing techniques. In order to crowdsource sea level data from the Mid-Pliocene Warm Period, we developed three tools: PlioWiki, RSLcalcand RSLmap. PlioWiki is a web portal, open to contributions, where investigators can share knowledge on Pliocene to Quaternary relative sea levels. RSLcalcis a standardized, ready-to-use tool for field geologists to log their own sea level field observations and, if they desire, submit new data to an open access database of relative sea level markers. RSLmapallows one to visualize and query the database built with RSLcalcon a Google Map interface. Here we describe these tools and discuss the advantages of crowdsourcing, relative to traditional approaches, for the creation of sea level databases for any time period. © 2012 Elsevier Ltd.\n
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\n \n\n \n \n \n \n \n Linking the historic 2011 Mississippi River flood to coastal wetland sedimentation.\n \n \n \n\n\n \n Falcini, F.; Khan, N. S; Macelloni, L.; Horton, B. P; Lutken, C. B; Mckee, K. L.; Santoleri, R.; Colella, S.; Li, C.; Volpe, G.; D'emidio, M.; Salusti, A.; and Jerolmack, D. J.\n\n\n \n\n\n\n 2012.\n ISBN: 1752-0894 ISSN: 17520894 Issue: 11 Pages: 803–807 Publication Title: Nature Geoscience Volume: 5\n\n\n\n
\n\n\n\n \n\n \n \n doi\n  \n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@misc{falcini_linking_2012,\n\ttitle = {Linking the historic 2011 {Mississippi} {River} flood to coastal wetland sedimentation},\n\tabstract = {Wetlands in the Mississippi River deltaic plain are deteriorating(1) in part because levees and control structures starve them of sediment(2-4). In spring 2011 a record-breaking flood brought discharge on the lower Mississippi River to dangerous levels, forcing managers to divert up to 3,500 m(3) s(-1) of water to the Atchafalaya River Basin(5). Here we use field-calibrated satellite data to quantify differences in inundation and sediment-plume patterns between the Mississippi and Atchafalaya River. We assess the impact of these extreme outflows on wetland sedimentation, and use in situ data collected during the historic flood to characterize the Mississippi plume's hydrodynamics and suspended sediment. We show that a focused, high-momentum jet emerged from the leveed Mississippi, and delivered sediment far offshore. In contrast, the plume from the Atchafalaya was more diffuse; diverted water inundated a large area, and sediment was trapped within the coastal current. The largest sedimentation, of up to several centimetres, occurred in the Atchafalaya Basin despite the larger sediment load carried by the Mississippi. Sediment accumulation was lowest along the shoreline between the two river sources. We conclude that river-mouth hydrodynamics and wetland sedimentation patterns are mechanistically linked, providing results that are relevant for plans to restore deltaic wetlands using artificial diversions(2-4,6-8).},\n\tpublisher = {Nature Research},\n\tauthor = {Falcini, Federico and Khan, Nicole S and Macelloni, Leonardo and Horton, Benjamin P and Lutken, Carol B and Mckee, Karen L. and Santoleri, Rosalia and Colella, Simone and Li, Chunyan and Volpe, Gianluca and D'emidio, Marco and Salusti, Alessandro and Jerolmack, Douglas J.},\n\tyear = {2012},\n\tdoi = {10.1038/ngeo1615},\n\tnote = {ISBN: 1752-0894\nISSN: 17520894\nIssue: 11\nPages: 803–807\nPublication Title: Nature Geoscience\nVolume: 5},\n}\n\n
\n
\n\n\n
\n Wetlands in the Mississippi River deltaic plain are deteriorating(1) in part because levees and control structures starve them of sediment(2-4). In spring 2011 a record-breaking flood brought discharge on the lower Mississippi River to dangerous levels, forcing managers to divert up to 3,500 m(3) s(-1) of water to the Atchafalaya River Basin(5). Here we use field-calibrated satellite data to quantify differences in inundation and sediment-plume patterns between the Mississippi and Atchafalaya River. We assess the impact of these extreme outflows on wetland sedimentation, and use in situ data collected during the historic flood to characterize the Mississippi plume's hydrodynamics and suspended sediment. We show that a focused, high-momentum jet emerged from the leveed Mississippi, and delivered sediment far offshore. In contrast, the plume from the Atchafalaya was more diffuse; diverted water inundated a large area, and sediment was trapped within the coastal current. The largest sedimentation, of up to several centimetres, occurred in the Atchafalaya Basin despite the larger sediment load carried by the Mississippi. Sediment accumulation was lowest along the shoreline between the two river sources. We conclude that river-mouth hydrodynamics and wetland sedimentation patterns are mechanistically linked, providing results that are relevant for plans to restore deltaic wetlands using artificial diversions(2-4,6-8).\n
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\n \n\n \n \n \n \n \n \n The anatomy of interglacial sea levels: The relationship between sea levels and ice volumes during the Last Interglacial.\n \n \n \n \n\n\n \n Lambeck, K.; Purcell, A.; and Dutton, A.\n\n\n \n\n\n\n Earth and Planetary Science Letters, 315-316: 4–11. 2012.\n ISBN: 0012-821X Publisher: Elsevier B.V.\n\n\n\n
\n\n\n\n \n \n \"ThePaper\n  \n \n\n \n \n doi\n  \n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n  \n \n 1 download\n \n \n\n \n \n \n \n \n \n \n\n  \n \n \n \n \n \n \n \n \n \n \n\n\n\n
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@article{lambeck_anatomy_2012,\n\ttitle = {The anatomy of interglacial sea levels: {The} relationship between sea levels and ice volumes during the {Last} {Interglacial}},\n\tvolume = {315-316},\n\tissn = {0012821X},\n\turl = {http://www.sciencedirect.com/science/article/pii/S0012821X11004900 papers2://publication/doi/10.1016/j.epsl.2011.08.026},\n\tdoi = {10.1016/j.epsl.2011.08.026},\n\tabstract = {The elevations and chronology of interglacial shorelines and other sea-level indicators provide information on ice volumes for these earlier periods compared with today. But, as for the Holocene, the relationship between sea levels and ice volumes for earlier interglacials is not simple because of the planet's deformational, gravitational and rotational response to changes in ice-water loads (glacio-hydro isostasy). In particular, the pattern of global sea level for a particular interglacial will be a function of the earth and ocean response to ice loads applied before, during and after the interglacial in question. This paper examines the role of glacio-hydro isostasy during these glacial cycles to make three key points. The first is to demonstrate why interglacial sea levels cannot be interpreted directly in terms of ice volume. The second is to illustrate the spatial variability that can be expected in interglacial sea levels because of the Earth's isostatic response to changing ice and water loads and to demonstrate why observations from different localities should not be combined into a single sea-level function without first correcting for differential isostatic effects. The third addresses the question whether, in the absence of perfect knowledge of the ice sheets and earth rheology, inferences can be made about ice volumes during an interglacial. We conclude that if these isostatic factors are ignored, interpretations of interglacial sea levels can lead to serious errors in the inferences about ice volumes during the interglacials. © 2011 Elsevier B.V.},\n\tjournal = {Earth and Planetary Science Letters},\n\tauthor = {Lambeck, Kurt and Purcell, Anthony and Dutton, Andrea},\n\tyear = {2012},\n\tnote = {ISBN: 0012-821X\nPublisher: Elsevier B.V.},\n\tkeywords = {Glacio-hydro-isostasy, Ice volume, Last Interglacial, Sea level},\n\tpages = {4--11},\n}\n\n
\n
\n\n\n
\n The elevations and chronology of interglacial shorelines and other sea-level indicators provide information on ice volumes for these earlier periods compared with today. But, as for the Holocene, the relationship between sea levels and ice volumes for earlier interglacials is not simple because of the planet's deformational, gravitational and rotational response to changes in ice-water loads (glacio-hydro isostasy). In particular, the pattern of global sea level for a particular interglacial will be a function of the earth and ocean response to ice loads applied before, during and after the interglacial in question. This paper examines the role of glacio-hydro isostasy during these glacial cycles to make three key points. The first is to demonstrate why interglacial sea levels cannot be interpreted directly in terms of ice volume. The second is to illustrate the spatial variability that can be expected in interglacial sea levels because of the Earth's isostatic response to changing ice and water loads and to demonstrate why observations from different localities should not be combined into a single sea-level function without first correcting for differential isostatic effects. The third addresses the question whether, in the absence of perfect knowledge of the ice sheets and earth rheology, inferences can be made about ice volumes during an interglacial. We conclude that if these isostatic factors are ignored, interpretations of interglacial sea levels can lead to serious errors in the inferences about ice volumes during the interglacials. © 2011 Elsevier B.V.\n
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\n \n\n \n \n \n \n \n Century-scale relative sea-level changes in West Greenland - A plausibility study to assess contributions from the cryosphere and the ocean.\n \n \n \n\n\n \n Wake, L M; Milne, G A; Long, A J; Woodroffe, S A; Simpson, M. J.; and Huybrechts, P.\n\n\n \n\n\n\n Earth and Planetary Science Letters, 315-316: 86–93. 2012.\n ISBN: 0012-821X Publisher: Elsevier\n\n\n\n
\n\n\n\n \n\n \n \n doi\n  \n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n \n \n \n \n \n \n \n \n \n \n\n\n\n
\n
@article{wake_century-scale_2012,\n\ttitle = {Century-scale relative sea-level changes in {West} {Greenland} - {A} plausibility study to assess contributions from the cryosphere and the ocean},\n\tvolume = {315-316},\n\tissn = {0012821X},\n\tdoi = {10.1016/j.epsl.2011.09.029},\n\tabstract = {This paper interprets high resolution relative sea-level (RSL) reconstructions obtained from recently deposited salt-marsh sediments in Greenland. The primary aim of this study is to determine the relative contribution to the RSL observations from local to regional ice mass changes as well as density-related (steric) variations in the adjacent ocean. At sites in west Greenland, RSL rise slows from ∼ 3. mm/yr to ∼ 0. mm/yr at 400. years BP and is stable thereafter. In south Greenland, a similar RSL slowdown is also observed but this occurs approximately 200. yrs later. Substantial contributions from oceanographic changes are ruled out as dominant drivers of the RSL slowdown in western Greenland but could be more important at Nanortalik. Model sensitivity tests indicate that the RSL data are not compatible with a dominant dynamic ice loss via the Jakobshavn Isbrae outlet glacier as the region of ice loss and the resulting sea-level trends are too localised. Regional changes in ice thickness related to surface mass balance changes can explain the observed RSL signals but only if there is dominant mass loss during the period 400. years BP to present. This conclusion is unaffected even when uncertainties in Earth viscosity structure are taken into account. However, it is plausible that some of the RSL fall may be due to reduced ice growth at the onset of the Little Ice Age. A high resolution mass balance history of the Greenland Ice Sheet over the past few millennia and the influence of lateral Earth structure on predictions of RSL change are identified as priority areas of study in order to confidently separate local, 'transient' (e.g. elastic and gravitational) RSL changes from the long-term viscous contribution associated primarily with deglacial changes. © 2011 Elsevier B.V.},\n\tjournal = {Earth and Planetary Science Letters},\n\tauthor = {Wake, L M and Milne, G A and Long, A J and Woodroffe, S A and Simpson, M. J.R. and Huybrechts, Philippe},\n\tyear = {2012},\n\tnote = {ISBN: 0012-821X\nPublisher: Elsevier},\n\tkeywords = {Greenland Ice Sheet, Little Ice Age, Medieval Climatic Anomaly, Sea-level change, Steric sea level},\n\tpages = {86--93},\n}\n\n
\n
\n\n\n
\n This paper interprets high resolution relative sea-level (RSL) reconstructions obtained from recently deposited salt-marsh sediments in Greenland. The primary aim of this study is to determine the relative contribution to the RSL observations from local to regional ice mass changes as well as density-related (steric) variations in the adjacent ocean. At sites in west Greenland, RSL rise slows from ∼ 3. mm/yr to ∼ 0. mm/yr at 400. years BP and is stable thereafter. In south Greenland, a similar RSL slowdown is also observed but this occurs approximately 200. yrs later. Substantial contributions from oceanographic changes are ruled out as dominant drivers of the RSL slowdown in western Greenland but could be more important at Nanortalik. Model sensitivity tests indicate that the RSL data are not compatible with a dominant dynamic ice loss via the Jakobshavn Isbrae outlet glacier as the region of ice loss and the resulting sea-level trends are too localised. Regional changes in ice thickness related to surface mass balance changes can explain the observed RSL signals but only if there is dominant mass loss during the period 400. years BP to present. This conclusion is unaffected even when uncertainties in Earth viscosity structure are taken into account. However, it is plausible that some of the RSL fall may be due to reduced ice growth at the onset of the Little Ice Age. A high resolution mass balance history of the Greenland Ice Sheet over the past few millennia and the influence of lateral Earth structure on predictions of RSL change are identified as priority areas of study in order to confidently separate local, 'transient' (e.g. elastic and gravitational) RSL changes from the long-term viscous contribution associated primarily with deglacial changes. © 2011 Elsevier B.V.\n
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\n \n\n \n \n \n \n \n \n Nineteenth and twentieth century sea-level changes in Tasmania and New Zealand.\n \n \n \n \n\n\n \n Gehrels, W.; Callard, S.; Moss, P.; and Marshall, W.\n\n\n \n\n\n\n Earth and Planetary, 315: 94–102. 2012.\n Publisher: Elsevier\n\n\n\n
\n\n\n\n \n \n \"NineteenthPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{gehrels_nineteenth_2012,\n\ttitle = {Nineteenth and twentieth century sea-level changes in {Tasmania} and {New} {Zealand}},\n\tvolume = {315},\n\turl = {http://www.sciencedirect.com/science/article/pii/S0012821X11005103},\n\tjournal = {Earth and Planetary},\n\tauthor = {Gehrels, WR and Callard, SL and Moss, PT and Marshall, WA},\n\tyear = {2012},\n\tnote = {Publisher: Elsevier},\n\tpages = {94--102},\n}\n\n
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\n \n\n \n \n \n \n \n Understanding sea-level change is impossible without both insights from paleo studies and working across disciplines.\n \n \n \n\n\n \n Siddall, M.; and Milne, G. A\n\n\n \n\n\n\n Earth and Planetary Science Letters, 315-316: 2–3. 2012.\n ISBN: 0954102009990 Publisher: Elsevier\n\n\n\n
\n\n\n\n \n\n \n \n doi\n  \n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n \n \n \n \n \n \n \n \n\n\n\n
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@article{siddall_understanding_2012,\n\ttitle = {Understanding sea-level change is impossible without both insights from paleo studies and working across disciplines},\n\tvolume = {315-316},\n\tissn = {0012821X},\n\tdoi = {10.1016/j.epsl.2011.10.023},\n\tabstract = {In recent years there have been significant advances in the observational and modeling techniques used to reconstruct and interpret paleo records that relate to changes in sea-level and/or ice extent. This special issue, which presents contributions from the PALeo constraints on Sea-level (PALSEA) PAGES/IMAGES/WUN. 11Past Global Changes/the International Marine Past Global Changes study/World University Network. working group, reflects a number of these developments. Here, we provide an overview of the papers presented in this special issue. By bringing insights from very different paleo-archives and methodologies together, we hope that this special issue will encourage new ideas and collaborations in this area of climate science. © 2011 Elsevier B.V.},\n\tjournal = {Earth and Planetary Science Letters},\n\tauthor = {Siddall, Mark and Milne, Glenn A},\n\tyear = {2012},\n\tnote = {ISBN: 0954102009990\nPublisher: Elsevier},\n\tkeywords = {Ice sheets, Isostasy, Paleoclimate, Sea level},\n\tpages = {2--3},\n}\n\n
\n
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\n In recent years there have been significant advances in the observational and modeling techniques used to reconstruct and interpret paleo records that relate to changes in sea-level and/or ice extent. This special issue, which presents contributions from the PALeo constraints on Sea-level (PALSEA) PAGES/IMAGES/WUN. 11Past Global Changes/the International Marine Past Global Changes study/World University Network. working group, reflects a number of these developments. Here, we provide an overview of the papers presented in this special issue. By bringing insights from very different paleo-archives and methodologies together, we hope that this special issue will encourage new ideas and collaborations in this area of climate science. © 2011 Elsevier B.V.\n
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\n \n\n \n \n \n \n \n Relative sea-level response to Little Ice Age ice mass change in south central Alaska: Reconciling model predictions and geological evidence.\n \n \n \n\n\n \n Barlow, N. L.; Shennan, I.; and Long, A. J.\n\n\n \n\n\n\n Earth and Planetary Science Letters, 315-316: 62–75. 2012.\n Publisher: Elsevier\n\n\n\n
\n\n\n\n \n\n \n \n doi\n  \n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n\n\n\n
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@article{barlow_relative_2012,\n\ttitle = {Relative sea-level response to {Little} {Ice} {Age} ice mass change in south central {Alaska}: {Reconciling} model predictions and geological evidence},\n\tvolume = {315-316},\n\tissn = {0012821X},\n\tdoi = {10.1016/j.epsl.2011.09.048},\n\tabstract = {Integration of geological data and glacio-isostatic adjustment (GIA) modelling shows that it is possible to decouple complex mechanisms of relative sea-level (RSL) change in a tectonically active glacial environment. We model a simplest solution in which RSL changes in upper Cook Inlet, Alaska, are a combination of the interplay of tectonic and isostatic processes driven by the unique rheology of this tectonically active location. We calculate interseismic uplift during latter part of the penultimate earthquake cycle to vary from 0.3 to 0.7. mm/yr. Diatom based reconstructions of RSL from tidal marsh sediment sequences coupled with detailed age models, from AD 1400 to the AD 1964 great earthquake, show deviations from a purely tectonically driven model of regional RSL. Glacial isostatic modelling, constrained by GPS data, predicts up to 70. cm sea-level change due to mountain glacier mass balance changes during the Little Ice Age. Misfits between the GIA model predictions and RSL reconstructions in the 19th and 20th century highlight that the tidal marshes of upper Cook Inlet potentially record a hemispheric-wide acceleration in sea level and that other more complex Earth process combinations may contribute to regional RSL change. © 2011 Elsevier B.V.},\n\tjournal = {Earth and Planetary Science Letters},\n\tauthor = {Barlow, Natasha L.M. and Shennan, Ian and Long, Antony J.},\n\tyear = {2012},\n\tnote = {Publisher: Elsevier},\n\tkeywords = {Dating, Diatoms, Earthquake deformation cycle, Glacial isostatic adjustment, Little Ice Age, Relative sea-level change},\n\tpages = {62--75},\n}\n\n
\n
\n\n\n
\n Integration of geological data and glacio-isostatic adjustment (GIA) modelling shows that it is possible to decouple complex mechanisms of relative sea-level (RSL) change in a tectonically active glacial environment. We model a simplest solution in which RSL changes in upper Cook Inlet, Alaska, are a combination of the interplay of tectonic and isostatic processes driven by the unique rheology of this tectonically active location. We calculate interseismic uplift during latter part of the penultimate earthquake cycle to vary from 0.3 to 0.7. mm/yr. Diatom based reconstructions of RSL from tidal marsh sediment sequences coupled with detailed age models, from AD 1400 to the AD 1964 great earthquake, show deviations from a purely tectonically driven model of regional RSL. Glacial isostatic modelling, constrained by GPS data, predicts up to 70. cm sea-level change due to mountain glacier mass balance changes during the Little Ice Age. Misfits between the GIA model predictions and RSL reconstructions in the 19th and 20th century highlight that the tidal marshes of upper Cook Inlet potentially record a hemispheric-wide acceleration in sea level and that other more complex Earth process combinations may contribute to regional RSL change. © 2011 Elsevier B.V.\n
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\n \n\n \n \n \n \n \n \n Relative sea-level change in Greenland during the last 700 yrs and ice sheet response to the Little Ice Age.\n \n \n \n \n\n\n \n Long, A. J; Woodroffe, S. A; Milne, G. A; Bryant, C. L; Simpson, M. J.; and Wake, L. M\n\n\n \n\n\n\n Earth and Planetary Science Letters, 315–316: 76–85. 2012.\n ISBN: 0012-821X Publisher: Elsevier\n\n\n\n
\n\n\n\n \n \n \"RelativePaper\n  \n \n\n \n \n doi\n  \n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{long_relative_2012,\n\ttitle = {Relative sea-level change in {Greenland} during the last 700 yrs and ice sheet response to the {Little} {Ice} {Age}},\n\tvolume = {315–316},\n\tissn = {0012-821X},\n\turl = {http://www.sciencedirect.com/science/article/pii/S0012821X11003980{\\%}5Cnhttp://www.sciencedirect.com.proxy.libraries.rutgers.edu/science/article/pii/S0012821X11003980},\n\tdoi = {10.1016/j.epsl.2011.06.027},\n\tabstract = {This paper presents new evidence regarding relative sea-level (RSL) changes and vertical land motions at three sites in Greenland since 1300 A.D., a time interval that spans the later part of the Medieval Climate Anomaly (MCA) and the Little Ice Age (LIA). We observe RSL rise at two sites in central west Greenland from c. − 0.80 ± 0.20 m at c. 1300 A.D. to c. − 0.20 m ± 0.25 m at c. 1600 A.D., after which RSL slowed and then stabilised. At a third site in south Greenland, we observe RSL rise from c. − 1.40 ± 0.20 m at c. 1400 A.D. until c. 1750 A.D., after which RSL slowed and was stable during at least the latter part of the 20th century. The c. 1600 A.D. RSL slow-down seen at the two former sites is surprising because it occurs during the LIA when one might expect the ice sheet to be gaining mass and causing RSL to rise. We interpret this RSL slowdown to indicate a period of enhanced regional mass loss from central west Greenland since c. 1600 A.D. and propose two hypotheses for this loss: first, a reduction in precipitation during cold and dry conditions and second, higher air temperatures and increased peripheral surface melt of the ice sheet from this date onwards. The latter hypothesis is compatible with a well-established temperature seesaw between western Greenland and northern Europe and, potentially, a previously identified shift from a positive to generally more negative NAO conditions around 1400 to 1600 A.D. Our study shows how RSL data from Greenland can provide constraints on the timing of ice sheet fluctuations in the last millennium and challenges the notion that during cold periods in northern Europe the ice sheet in west Greenland gained mass.},\n\tjournal = {Earth and Planetary Science Letters},\n\tauthor = {Long, Antony J and Woodroffe, Sarah A and Milne, Glenn A and Bryant, Charlotte L and Simpson, Matthew J.R. and Wake, Leanne M},\n\tyear = {2012},\n\tnote = {ISBN: 0012-821X\nPublisher: Elsevier},\n\tpages = {76--85},\n}\n\n
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\n This paper presents new evidence regarding relative sea-level (RSL) changes and vertical land motions at three sites in Greenland since 1300 A.D., a time interval that spans the later part of the Medieval Climate Anomaly (MCA) and the Little Ice Age (LIA). We observe RSL rise at two sites in central west Greenland from c. − 0.80 ± 0.20 m at c. 1300 A.D. to c. − 0.20 m ± 0.25 m at c. 1600 A.D., after which RSL slowed and then stabilised. At a third site in south Greenland, we observe RSL rise from c. − 1.40 ± 0.20 m at c. 1400 A.D. until c. 1750 A.D., after which RSL slowed and was stable during at least the latter part of the 20th century. The c. 1600 A.D. RSL slow-down seen at the two former sites is surprising because it occurs during the LIA when one might expect the ice sheet to be gaining mass and causing RSL to rise. We interpret this RSL slowdown to indicate a period of enhanced regional mass loss from central west Greenland since c. 1600 A.D. and propose two hypotheses for this loss: first, a reduction in precipitation during cold and dry conditions and second, higher air temperatures and increased peripheral surface melt of the ice sheet from this date onwards. The latter hypothesis is compatible with a well-established temperature seesaw between western Greenland and northern Europe and, potentially, a previously identified shift from a positive to generally more negative NAO conditions around 1400 to 1600 A.D. Our study shows how RSL data from Greenland can provide constraints on the timing of ice sheet fluctuations in the last millennium and challenges the notion that during cold periods in northern Europe the ice sheet in west Greenland gained mass.\n
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\n \n\n \n \n \n \n \n Evidence for centennial scale sea level variability during the Medieval Climate Optimum (Crusader Period) in Israel, eastern Mediterranean.\n \n \n \n\n\n \n Toker, E; Sivan, D; Stern, E; Shirman, B; Tsimplis, M; and Spada, G\n\n\n \n\n\n\n Earth and Planetary Science Letters, 315-316: 51–61. 2012.\n ISBN: 0012-821X Publisher: Elsevier\n\n\n\n
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@article{toker_evidence_2012,\n\ttitle = {Evidence for centennial scale sea level variability during the {Medieval} {Climate} {Optimum} ({Crusader} {Period}) in {Israel}, eastern {Mediterranean}},\n\tvolume = {315-316},\n\tissn = {0012821X},\n\tdoi = {10.1016/j.epsl.2011.07.019},\n\tabstract = {The current study provides evidence supporting a sea-level drop of up to about 50 ± 20. cm at the eastern coasts of the Mediterranean basin during the period AD 900-1300. The estimate is based on a variety of archaeological remains, mostly from the Crusader period, compared with other archaeological and biological proxies of sea level from the periods before and after.The Crusader low levels overlap the period known as the 'Medieval Warm Period' (MWP) or the 'Medieval Climate Anomaly' (MCA). On the basis of published data it appears that a positive North Atlantic Oscillation (NAO) phase coincided with a negative Southern Oscillation Index (SOI), the former affecting the temperature and freshwater flux in the Mediterranean Sea and most of its rivers, and the latter affecting the Nile outflow. Changes of 0.125. psu in salinity and 0.4 °C are estimated as upper limits for the change, and these are expected to cause a sea-level drop consistent in magnitude with the observed values. These provide the upper limit for a regional climate-forcing attribution of the observed sea level low. The possibility of crustal uplifts contributing to the observed changes is also discussed. © 2011 Elsevier B.V.},\n\tjournal = {Earth and Planetary Science Letters},\n\tauthor = {Toker, E and Sivan, D and Stern, E and Shirman, B and Tsimplis, M and Spada, G},\n\tyear = {2012},\n\tnote = {ISBN: 0012-821X\nPublisher: Elsevier},\n\tkeywords = {Archaeological sea-level indications, East Mediterranean, Medieval Climate Anomaly (MCA), Positive NAO conditions, Sea-level},\n\tpages = {51--61},\n}\n\n
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\n The current study provides evidence supporting a sea-level drop of up to about 50 ± 20. cm at the eastern coasts of the Mediterranean basin during the period AD 900-1300. The estimate is based on a variety of archaeological remains, mostly from the Crusader period, compared with other archaeological and biological proxies of sea level from the periods before and after.The Crusader low levels overlap the period known as the 'Medieval Warm Period' (MWP) or the 'Medieval Climate Anomaly' (MCA). On the basis of published data it appears that a positive North Atlantic Oscillation (NAO) phase coincided with a negative Southern Oscillation Index (SOI), the former affecting the temperature and freshwater flux in the Mediterranean Sea and most of its rivers, and the latter affecting the Nile outflow. Changes of 0.125. psu in salinity and 0.4 °C are estimated as upper limits for the change, and these are expected to cause a sea-level drop consistent in magnitude with the observed values. These provide the upper limit for a regional climate-forcing attribution of the observed sea level low. The possibility of crustal uplifts contributing to the observed changes is also discussed. © 2011 Elsevier B.V.\n
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\n \n\n \n \n \n \n \n Synchronizing a sea-level jump, final Lake Agassiz drainage, and abrupt cooling 8200years ago.\n \n \n \n\n\n \n Li, Y. X.; Törnqvist, T. E; Nevitt, J. M; and Kohl, B.\n\n\n \n\n\n\n Earth and Planetary Science Letters, 315-316: 41–50. 2012.\n ISBN: 0012-821X Publisher: Elsevier\n\n\n\n
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@article{li_synchronizing_2012,\n\ttitle = {Synchronizing a sea-level jump, final {Lake} {Agassiz} drainage, and abrupt cooling 8200years ago},\n\tvolume = {315-316},\n\tissn = {0012821X},\n\tdoi = {10.1016/j.epsl.2011.05.034},\n\tabstract = {Freshwater pulses draining into the North Atlantic Ocean are commonly hypothesized to have perturbed the Atlantic meridional overturning circulation (MOC), triggering abrupt climate changes such as Heinrich events, the Younger Dryas, and the 8.2. ka event. However, dating uncertainties have prevented causal links between freshwater pulses and climate events from being firmly established. Here we report a high-resolution relative sea-level record from the Mississippi Delta that documents a sea-level jump that occurred within the 8.18 to 8.31. ka (2σ) time window and is attributed to the final drainage of proglacial Lake Agassiz-Ojibway (LAO). This age is indistinguishable from the onset of the 8.2. ka climate event, consistent with a nearly immediate ocean-atmosphere response to the freshwater perturbation. This constitutes a rare currently available example of a major abrupt climate cooling that can be directly linked to a well-documented freshwater source with a temporal resolution on the order of a century. The total inferred eustatic sea-level rise associated with the very final stage of LAO drainage at 8.2. ka ranges from 0.8 to 2.2. m, considerably higher than previous estimates. These new constraints on the timing and amount of final LAO drainage permit significantly improved quantitative analysis of the sensitivity of MOC to freshwater perturbation, a crucial step toward understanding abrupt climate change. © 2011 Elsevier B.V.},\n\tjournal = {Earth and Planetary Science Letters},\n\tauthor = {Li, Yong Xiang and Törnqvist, Torbjörn E and Nevitt, Johanna M and Kohl, Barry},\n\tyear = {2012},\n\tnote = {ISBN: 0012-821X\nPublisher: Elsevier},\n\tkeywords = {8.2 ka event, Abrupt climate change, Mississippi Delta, Sea level},\n\tpages = {41--50},\n}\n\n
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\n Freshwater pulses draining into the North Atlantic Ocean are commonly hypothesized to have perturbed the Atlantic meridional overturning circulation (MOC), triggering abrupt climate changes such as Heinrich events, the Younger Dryas, and the 8.2. ka event. However, dating uncertainties have prevented causal links between freshwater pulses and climate events from being firmly established. Here we report a high-resolution relative sea-level record from the Mississippi Delta that documents a sea-level jump that occurred within the 8.18 to 8.31. ka (2σ) time window and is attributed to the final drainage of proglacial Lake Agassiz-Ojibway (LAO). This age is indistinguishable from the onset of the 8.2. ka climate event, consistent with a nearly immediate ocean-atmosphere response to the freshwater perturbation. This constitutes a rare currently available example of a major abrupt climate cooling that can be directly linked to a well-documented freshwater source with a temporal resolution on the order of a century. The total inferred eustatic sea-level rise associated with the very final stage of LAO drainage at 8.2. ka ranges from 0.8 to 2.2. m, considerably higher than previous estimates. These new constraints on the timing and amount of final LAO drainage permit significantly improved quantitative analysis of the sensitivity of MOC to freshwater perturbation, a crucial step toward understanding abrupt climate change. © 2011 Elsevier B.V.\n
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\n \n\n \n \n \n \n \n Modeling the surface mass-balance response of the Laurentide Ice Sheet to Bølling warming and its contribution to Meltwater Pulse 1A.\n \n \n \n\n\n \n Carlson, A. E; Ullman, D. J; Anslow, F. S; He, F.; Clark, P. U; Liu, Z.; and Otto-Bliesner, B. L\n\n\n \n\n\n\n Earth and Planetary Science Letters, 315-316: 24–29. 2012.\n ISBN: 0012-821X Publisher: Elsevier\n\n\n\n
\n\n\n\n \n\n \n \n doi\n  \n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n \n \n \n \n \n \n \n \n \n \n\n\n\n
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@article{carlson_modeling_2012,\n\ttitle = {Modeling the surface mass-balance response of the {Laurentide} {Ice} {Sheet} to {Bølling} warming and its contribution to {Meltwater} {Pulse} {1A}},\n\tvolume = {315-316},\n\tissn = {0012821X},\n\tdoi = {10.1016/j.epsl.2011.07.008},\n\tabstract = {Meltwater Pulse (MWP) 1A occurred ∼ 14.5-14. ka and is the largest abrupt rise in sea level (10-20. m of sea-level rise) of the last deglaciation. The timing of MWP-1A is coincident with or shortly follows the abrupt warming of the North Atlantic region into the Bølling warm period, which could have triggered a large Laurentide Ice Sheet (LIS) contribution to MWP-1A. Given that outside of the Arctic, LIS iceberg discharge probably did not increase during the Bølling, much of the LIS MWP-1A contribution likely occurred through surface ablation. Here we test the response of LIS surface mass-balance to Bølling warming by forcing a LIS energy-mass balance model with climate from an atmosphere-ocean general circulation model. Our modeling approach neglects changes in LIS mass from dynamics and iceberg calving, allowing us to isolate the surface mass balance response. Model results suggest that LIS surface ablation can explain much of the sea-level rise just prior to MWP-1A. LIS surface mass-balance becomes more negative in response to the Bølling warming, contributing an additional 2.9 ± 1.0. m of sea-level rise in 500. yr in addition to the background contribution of 4.0 ± 0.8. m. The modeled LIS MWP-1A contribution is less than previous assumptions but agrees with geochemical runoff and LIS area-volume estimates. The fraction of MWP-1A attributable to other ice sheets, particularly Antarctica, depends on the total sea-level rise that occurred during this MWP. © 2011 Elsevier B.V.},\n\tjournal = {Earth and Planetary Science Letters},\n\tauthor = {Carlson, Anders E and Ullman, David J and Anslow, Faron S and He, Feng and Clark, Peter U and Liu, Zhengyu and Otto-Bliesner, Bette L},\n\tyear = {2012},\n\tnote = {ISBN: 0012-821X\nPublisher: Elsevier},\n\tkeywords = {Bølling warm period, Laurentide Ice Sheet, Meltwater Pulse 1A, Sea-level rise, Surface mass-balance},\n\tpages = {24--29},\n}\n\n
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\n Meltwater Pulse (MWP) 1A occurred ∼ 14.5-14. ka and is the largest abrupt rise in sea level (10-20. m of sea-level rise) of the last deglaciation. The timing of MWP-1A is coincident with or shortly follows the abrupt warming of the North Atlantic region into the Bølling warm period, which could have triggered a large Laurentide Ice Sheet (LIS) contribution to MWP-1A. Given that outside of the Arctic, LIS iceberg discharge probably did not increase during the Bølling, much of the LIS MWP-1A contribution likely occurred through surface ablation. Here we test the response of LIS surface mass-balance to Bølling warming by forcing a LIS energy-mass balance model with climate from an atmosphere-ocean general circulation model. Our modeling approach neglects changes in LIS mass from dynamics and iceberg calving, allowing us to isolate the surface mass balance response. Model results suggest that LIS surface ablation can explain much of the sea-level rise just prior to MWP-1A. LIS surface mass-balance becomes more negative in response to the Bølling warming, contributing an additional 2.9 ± 1.0. m of sea-level rise in 500. yr in addition to the background contribution of 4.0 ± 0.8. m. The modeled LIS MWP-1A contribution is less than previous assumptions but agrees with geochemical runoff and LIS area-volume estimates. The fraction of MWP-1A attributable to other ice sheets, particularly Antarctica, depends on the total sea-level rise that occurred during this MWP. © 2011 Elsevier B.V.\n
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\n \n\n \n \n \n \n \n A data-calibrated distribution of deglacial chronologies for the North American ice complex from glaciological modeling.\n \n \n \n\n\n \n Tarasov, L.; Dyke, A. S; Neal, R. M; and Peltier, W R.\n\n\n \n\n\n\n Earth and Planetary Science Letters, 315-316: 30–40. 2012.\n ISBN: 0012-821X Publisher: Elsevier\n\n\n\n
\n\n\n\n \n\n \n \n doi\n  \n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n\n\n\n
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@article{tarasov_data-calibrated_2012,\n\ttitle = {A data-calibrated distribution of deglacial chronologies for the {North} {American} ice complex from glaciological modeling},\n\tvolume = {315-316},\n\tissn = {0012821X},\n\tdoi = {10.1016/j.epsl.2011.09.010},\n\tabstract = {Past deglacial ice sheet reconstructions have generally relied upon discipline-specific constraints with no attention given to the determination of objective confidence intervals. Reconstructions based on geophysical inversion of relative sea level (RSL) data have the advantage of large sets of proxy data but lack ice-mechanical constraints. Conversely, reconstructions based on dynamical ice sheet models are glaciologically self-consistent, but depend on poorly constrained climate forcings and sub-glacial processes.As an example of a much better constrained methodology that computes explicit error bars, we present a distribution of high-resolution glaciologically-self-consistent deglacial histories for the North American ice complex calibrated against a large set of RSL, marine limit, and geodetic data. The history is derived from ensemble-based analyses using the 3D MUN glacial systems model and a high-resolution ice-margin chronology derived from geological and geomorphological observations. Isostatic response is computed with the VM5a viscosity structure. Bayesian calibration of the model is carried out using Markov Chain Monte Carlo methods in combination with artificial neural networks trained to the model results. The calibration provides a posterior distribution for model parameters (and thereby modeled glacial histories) given the observational data sets that takes data uncertainty into account. Final ensemble results also account for fits between computed and observed strandlines and marine limits.Given the model (including choice of calibration parameters), input and constraint data sets, and VM5a earth rheology, we find the North American contribution to mwp1a was likely between 9.4 and 13.2. m eustatic over a 500. year interval. This is more than half of the total 16 to 26. m meltwater pulse over 500 to 700. years (with lower values being more probable) indicated by the Barbados coral record (Fairbanks, 1989; Peltier and Fairbanks, 2006) if one assumes a 5. meter living range for the Acropora Palmata coral. 20. ka ice volume for North America was likely 70.1 ± 2.0. m eustatic, or about 60\\% of the total contribution to eustatic sea level change. We suspect that the potentially most critical unquantified uncertainties in our analyses are those related to model structure (especially climate forcing), deglacial ice margin chronology, and earth rheology. © 2011 Elsevier B.V.},\n\tjournal = {Earth and Planetary Science Letters},\n\tauthor = {Tarasov, Lev and Dyke, Arthur S and Neal, Radford M and Peltier, W Richard},\n\tyear = {2012},\n\tnote = {ISBN: 0012-821X\nPublisher: Elsevier},\n\tkeywords = {Glacial model, Ice sheet reconstruction, Laurentide deglaciation, Meltwater pulse, Model calibration, Uncertainty},\n\tpages = {30--40},\n}\n
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\n Past deglacial ice sheet reconstructions have generally relied upon discipline-specific constraints with no attention given to the determination of objective confidence intervals. Reconstructions based on geophysical inversion of relative sea level (RSL) data have the advantage of large sets of proxy data but lack ice-mechanical constraints. Conversely, reconstructions based on dynamical ice sheet models are glaciologically self-consistent, but depend on poorly constrained climate forcings and sub-glacial processes.As an example of a much better constrained methodology that computes explicit error bars, we present a distribution of high-resolution glaciologically-self-consistent deglacial histories for the North American ice complex calibrated against a large set of RSL, marine limit, and geodetic data. The history is derived from ensemble-based analyses using the 3D MUN glacial systems model and a high-resolution ice-margin chronology derived from geological and geomorphological observations. Isostatic response is computed with the VM5a viscosity structure. Bayesian calibration of the model is carried out using Markov Chain Monte Carlo methods in combination with artificial neural networks trained to the model results. The calibration provides a posterior distribution for model parameters (and thereby modeled glacial histories) given the observational data sets that takes data uncertainty into account. Final ensemble results also account for fits between computed and observed strandlines and marine limits.Given the model (including choice of calibration parameters), input and constraint data sets, and VM5a earth rheology, we find the North American contribution to mwp1a was likely between 9.4 and 13.2. m eustatic over a 500. year interval. This is more than half of the total 16 to 26. m meltwater pulse over 500 to 700. years (with lower values being more probable) indicated by the Barbados coral record (Fairbanks, 1989; Peltier and Fairbanks, 2006) if one assumes a 5. meter living range for the Acropora Palmata coral. 20. ka ice volume for North America was likely 70.1 ± 2.0. m eustatic, or about 60% of the total contribution to eustatic sea level change. We suspect that the potentially most critical unquantified uncertainties in our analyses are those related to model structure (especially climate forcing), deglacial ice margin chronology, and earth rheology. © 2011 Elsevier B.V.\n
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\n \n\n \n \n \n \n \n Mineralogical determination of reef and periplatform carbonates: Calibration and implications for paleoceanography and radiochronology.\n \n \n \n\n\n \n Sepulcre, S.; Durand, N.; and Bard, E.\n\n\n \n\n\n\n Global and Planetary Change, 66(1-2): 1–9. 2009.\n Publisher: Elsevier\n\n\n\n
\n\n\n\n \n\n \n \n doi\n  \n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n \n \n \n \n \n \n\n\n\n
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@article{sepulcre_mineralogical_2009,\n\ttitle = {Mineralogical determination of reef and periplatform carbonates: {Calibration} and implications for paleoceanography and radiochronology},\n\tvolume = {66},\n\tissn = {09218181},\n\tdoi = {10.1016/j.gloplacha.2008.07.008},\n\tabstract = {Detection and precise quantification of the different carbonate minerals is crucial in selecting coral reef samples prior to geochemical and radiochronological measurements, thus helping to interpret changes in the mineralogical composition of geological formations made of reef material and associated sediments such as periplatform oozes. While powder X-ray diffraction (XRD) is a widely used method for mineralogical analysis, precise and accurate quantification of mineral abundance requires a thorough calibration of the instrument and method by means of gravimetric standards. In this study, we optimize a calibration method for the quantitative determination of four widespread Ca and Mg carbonates: calcite, aragonite, magnesian calcite (Mg-calcite) and dolomite. To detect and quantify very low calcite contents, which provide a crucial screening criterion for coral radiochronology, we perform a detailed survey of analytical precision and limits using two different XRD facilities. Detection and quantification limits (≈ 0.18\\% and ≈ 0.9\\% calcite in a calcite-aragonite mixture, respectively) are shown to be similar between the two instruments. The reproducibility of measurements clearly demonstrates that it is preferable to use peak area rather than peak height alone to obtain a precise quantification of the abundances of various carbonate minerals. © 2008 Elsevier B.V. All rights reserved.},\n\tnumber = {1-2},\n\tjournal = {Global and Planetary Change},\n\tauthor = {Sepulcre, Sophie and Durand, Nicolas and Bard, Edouard},\n\tyear = {2009},\n\tnote = {Publisher: Elsevier},\n\tkeywords = {X-ray diffraction, calcium carbonates, mineralogical detection and quantification},\n\tpages = {1--9},\n}\n\n
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\n Detection and precise quantification of the different carbonate minerals is crucial in selecting coral reef samples prior to geochemical and radiochronological measurements, thus helping to interpret changes in the mineralogical composition of geological formations made of reef material and associated sediments such as periplatform oozes. While powder X-ray diffraction (XRD) is a widely used method for mineralogical analysis, precise and accurate quantification of mineral abundance requires a thorough calibration of the instrument and method by means of gravimetric standards. In this study, we optimize a calibration method for the quantitative determination of four widespread Ca and Mg carbonates: calcite, aragonite, magnesian calcite (Mg-calcite) and dolomite. To detect and quantify very low calcite contents, which provide a crucial screening criterion for coral radiochronology, we perform a detailed survey of analytical precision and limits using two different XRD facilities. Detection and quantification limits (≈ 0.18% and ≈ 0.9% calcite in a calcite-aragonite mixture, respectively) are shown to be similar between the two instruments. The reproducibility of measurements clearly demonstrates that it is preferable to use peak area rather than peak height alone to obtain a precise quantification of the abundances of various carbonate minerals. © 2008 Elsevier B.V. All rights reserved.\n
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