Antarctic ice sheet discharge driven by atmosphere-ocean feedbacks at the Last Glacial Termination. Fogwill, C. J., Turney, C. S. M., Golledge, N. R., Etheridge, D. M., Rubino, M., Thornton, D. P., Baker, A., Woodward, J., Winter, K., van Ommen, T. D., Moy, A. D., Curran, M. A. J., Davies, S. M., Weber, M. E., Bird, M. I., Munksgaard, N. C., Menviel, L., Rootes, C. M., Ellis, B., Millman, H., Vohra, J., Rivera, A., & Cooper, A. Scientific Reports, 7:39979, January, 2017. 00000Paper doi abstract bibtex Reconstructing the dynamic response of the Antarctic ice sheets to warming during the Last Glacial Termination (LGT; 18,000–11,650 yrs ago) allows us to disentangle ice-climate feedbacks that are key to improving future projections. Whilst the sequence of events during this period is reasonably well- known, relatively poor chronological control has precluded precise alignment of ice, atmospheric and marine records, making it difficult to assess relationships between Antarctic ice-sheet (AIS) dynamics, climate change and sea level. Here we present results from a highly-resolved ‘horizontal ice core’ from the Weddell Sea Embayment, which records millennial-scale AIS dynamics across this extensive region. Counterintuitively, we find AIS mass-loss across the full duration of the Antarctic Cold Reversal (ACR; 14,600–12,700 yrs ago), with stabilisation during the subsequent millennia of atmospheric warming. Earth-system and ice-sheet modelling suggests these contrasting trends were likely Antarctic-wide, sustained by feedbacks amplified by the delivery of Circumpolar Deep Water onto the continental shelf. Given the anti-phase relationship between inter-hemispheric climate trends across the LGT our findings demonstrate that Southern Ocean-AIS feedbacks were controlled by global atmospheric teleconnections. With increasing stratification of the Southern Ocean and intensification of mid-latitude westerly winds today, such teleconnections could amplify AIS mass loss and accelerate global sea-level rise.
@article{fogwill_antarctic_2017,
title = {Antarctic ice sheet discharge driven by atmosphere-ocean feedbacks at the {Last} {Glacial} {Termination}},
volume = {7},
issn = {2045-2322},
url = {http://www.nature.com/articles/srep39979},
doi = {10.1038/srep39979},
abstract = {Reconstructing the dynamic response of the Antarctic ice sheets to warming during the Last Glacial
Termination (LGT; 18,000–11,650 yrs ago) allows us to disentangle ice-climate feedbacks that are key
to improving future projections. Whilst the sequence of events during this period is reasonably well-
known, relatively poor chronological control has precluded precise alignment of ice, atmospheric and
marine records, making it difficult to assess relationships between Antarctic ice-sheet (AIS) dynamics,
climate change and sea level. Here we present results from a highly-resolved ‘horizontal ice core’ from
the Weddell Sea Embayment, which records millennial-scale AIS dynamics across this extensive region.
Counterintuitively, we find AIS mass-loss across the full duration of the Antarctic Cold Reversal (ACR;
14,600–12,700 yrs ago), with stabilisation during the subsequent millennia of atmospheric warming.
Earth-system and ice-sheet modelling suggests these contrasting trends were likely Antarctic-wide,
sustained by feedbacks amplified by the delivery of Circumpolar Deep Water onto the continental
shelf. Given the anti-phase relationship between inter-hemispheric climate trends across the LGT our
findings demonstrate that Southern Ocean-AIS feedbacks were controlled by global atmospheric
teleconnections. With increasing stratification of the Southern Ocean and intensification of mid-latitude
westerly winds today, such teleconnections could amplify AIS mass loss and accelerate global sea-level
rise.},
urldate = {2017-01-09},
journal = {Scientific Reports},
author = {Fogwill, C. J. and Turney, C. S. M. and Golledge, N. R. and Etheridge, D. M. and Rubino, M. and Thornton, D. P. and Baker, A. and Woodward, J. and Winter, K. and van Ommen, T. D. and Moy, A. D. and Curran, M. A. J. and Davies, S. M. and Weber, M. E. and Bird, M. I. and Munksgaard, N. C. and Menviel, L. and Rootes, C. M. and Ellis, B. and Millman, H. and Vohra, J. and Rivera, A. and Cooper, A.},
month = jan,
year = {2017},
note = {00000},
keywords = {collapse, sea-level-rise},
pages = {39979},
file = {Fogwill et al. - 2017 - Antarctic ice sheet discharge driven by atmosphere.pdf:C\:\\Users\\rsrs\\Documents\\Zotero Database\\storage\\E5R4IR4C\\Fogwill et al. - 2017 - Antarctic ice sheet discharge driven by atmosphere.pdf:application/pdf}
}
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M.","Ellis, B.","Millman, H.","Vohra, J.","Rivera, A.","Cooper, A."],"bibdata":{"bibtype":"article","type":"article","title":"Antarctic ice sheet discharge driven by atmosphere-ocean feedbacks at the Last Glacial Termination","volume":"7","issn":"2045-2322","url":"http://www.nature.com/articles/srep39979","doi":"10.1038/srep39979","abstract":"Reconstructing the dynamic response of the Antarctic ice sheets to warming during the Last Glacial Termination (LGT; 18,000–11,650 yrs ago) allows us to disentangle ice-climate feedbacks that are key to improving future projections. Whilst the sequence of events during this period is reasonably well- known, relatively poor chronological control has precluded precise alignment of ice, atmospheric and marine records, making it difficult to assess relationships between Antarctic ice-sheet (AIS) dynamics, climate change and sea level. Here we present results from a highly-resolved ‘horizontal ice core’ from the Weddell Sea Embayment, which records millennial-scale AIS dynamics across this extensive region. Counterintuitively, we find AIS mass-loss across the full duration of the Antarctic Cold Reversal (ACR; 14,600–12,700 yrs ago), with stabilisation during the subsequent millennia of atmospheric warming. Earth-system and ice-sheet modelling suggests these contrasting trends were likely Antarctic-wide, sustained by feedbacks amplified by the delivery of Circumpolar Deep Water onto the continental shelf. Given the anti-phase relationship between inter-hemispheric climate trends across the LGT our findings demonstrate that Southern Ocean-AIS feedbacks were controlled by global atmospheric teleconnections. 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