Riverine particulate C and N generated at the permafrost thaw front: case study of western Siberian rivers across a 1700 km latitudinal transect. Krickov, I. V., Lim, A. G., Manasypov, R. M., Loiko, S. V., Shirokova, L. S., Kirpotin, S. N., Karlsson, J., & Pokrovsky, O. S. Biogeosciences, 15(22):6867–6884, November, 2018. ![Riverine particulate C and N generated at the permafrost thaw front: case study of western Siberian rivers across a 1700 km latitudinal transect [link]](https://bibbase.org/img/filetypes/link.svg "link")
Paper doi abstract bibtex \textlessp\textgreater\textlessstrong\textgreaterAbstract.\textless/strong\textgreater In contrast to numerous studies on the dynamics of dissolved ( < 0.45\textlessspan class="thinspace"\textgreater\textless/span\textgreaterµm) elements in permafrost-affected high-latitude rivers, very little is known of the behavior of river suspended ( > 0.45\textlessspan class="thinspace"\textgreater\textless/span\textgreaterµm) matter (RSM) in these regions. In order to test the effect of climate, permafrost and physio-geographical landscape parameters (bogs, forest and lake coverage of the watershed) on RSM and particulate C, N and P concentrations in river water, we sampled 33 small and medium-sized rivers (10–100\textlessspan class="thinspace"\textgreater\textless/span\textgreater000\textlessspan class="thinspace"\textgreater\textless/span\textgreaterkm$^{\textrm{2}}$ watershed) along a 1700\textlessspan class="thinspace"\textgreater\textless/span\textgreaterkm N–S transect including both permafrost-affected and permafrost-free zones of the Western Siberian Lowland (WSL). The concentrations of C and N in RSM decreased with the increase in river watershed size, illustrating (i) the importance of organic debris in small rivers which drain peatlands and (ii) the role of mineral matter from bank abrasion in larger rivers. The presence of lakes in the watershed increased C and N but decreased P concentrations in the RSM. The C : N ratio in the RSM reflected the source from the deep soil horizon rather than surface soil horizon, similar to that of other Arctic rivers. This suggests the export of peat and mineral particles through suprapermafrost flow occurring at the base of the active layer. There was a maximum of both particulate C and N concentrations and export fluxes at the beginning of permafrost appearance, in the sporadic and discontinuous zone (62–64°\textlessspan class="thinspace"\textgreater\textless/span\textgreaterN). This presumably reflected the organic matter mobilization from newly thawed organic horizons in soils at the active latitudinal thawing front. The results suggest that a northward shift of permafrost boundaries and an increase in active layer thickness may increase particulate C and N export by WSL rivers to the Arctic Ocean by a factor of 2, while P export may remain unchanged. In contrast, within a long-term climate warming scenario, the disappearance of permafrost in the north, the drainage of lakes and transformation of bogs to forest may decrease C and N concentrations in RSM by 2 to 3 times.\textless/p\textgreater
@article{krickov_riverine_2018,
title = {Riverine particulate {C} and {N} generated at the permafrost thaw front: case study of western {Siberian} rivers across a 1700\ km latitudinal transect},
volume = {15},
issn = {1726-4170},
shorttitle = {Riverine particulate {C} and {N} generated at the permafrost thaw front},
url = {https://www.biogeosciences.net/15/6867/2018/},
doi = {10.5194/bg-15-6867-2018},
abstract = {{\textless}p{\textgreater}{\textless}strong{\textgreater}Abstract.{\textless}/strong{\textgreater} In contrast to numerous studies on the dynamics of dissolved ( \< 0.45{\textless}span class="thinspace"{\textgreater}{\textless}/span{\textgreater}µm) elements in permafrost-affected high-latitude rivers, very little is known of the behavior of river suspended ( \> 0.45{\textless}span class="thinspace"{\textgreater}{\textless}/span{\textgreater}µm) matter (RSM) in these regions. In order to test the effect of climate, permafrost and physio-geographical landscape parameters (bogs, forest and lake coverage of the watershed) on RSM and particulate C, N and P concentrations in river water, we sampled 33 small and medium-sized rivers (10–100{\textless}span class="thinspace"{\textgreater}{\textless}/span{\textgreater}000{\textless}span class="thinspace"{\textgreater}{\textless}/span{\textgreater}km$^{\textrm{2}}$ watershed) along a 1700{\textless}span class="thinspace"{\textgreater}{\textless}/span{\textgreater}km N–S transect including both permafrost-affected and permafrost-free zones of the Western Siberian Lowland (WSL). The concentrations of C and N in RSM decreased with the increase in river watershed size, illustrating (i) the importance of organic debris in small rivers which drain peatlands and (ii) the role of mineral matter from bank abrasion in larger rivers. The presence of lakes in the watershed increased C and N but decreased P concentrations in the RSM. The C : N ratio in the RSM reflected the source from the deep soil horizon rather than surface soil horizon, similar to that of other Arctic rivers. This suggests the export of peat and mineral particles through suprapermafrost flow occurring at the base of the active layer. There was a maximum of both particulate C and N concentrations and export fluxes at the beginning of permafrost appearance, in the sporadic and discontinuous zone (62–64°{\textless}span class="thinspace"{\textgreater}{\textless}/span{\textgreater}N). This presumably reflected the organic matter mobilization from newly thawed organic horizons in soils at the active latitudinal thawing front. The results suggest that a northward shift of permafrost boundaries and an increase in active layer thickness may increase particulate C and N export by WSL rivers to the Arctic Ocean by a factor of 2, while P export may remain unchanged. In contrast, within a long-term climate warming scenario, the disappearance of permafrost in the north, the drainage of lakes and transformation of bogs to forest may decrease C and N concentrations in RSM by 2 to 3 times.{\textless}/p{\textgreater}},
language = {English},
number = {22},
urldate = {2018-11-27},
journal = {Biogeosciences},
author = {Krickov, Ivan V. and Lim, Artem G. and Manasypov, Rinat M. and Loiko, Sergey V. and Shirokova, Liudmila S. and Kirpotin, Sergey N. and Karlsson, Jan and Pokrovsky, Oleg S.},
month = nov,
year = {2018},
keywords = {\#nosource},
pages = {6867--6884},
}
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S."],"bibdata":{"bibtype":"article","type":"article","title":"Riverine particulate C and N generated at the permafrost thaw front: case study of western Siberian rivers across a 1700 km latitudinal transect","volume":"15","issn":"1726-4170","shorttitle":"Riverine particulate C and N generated at the permafrost thaw front","url":"https://www.biogeosciences.net/15/6867/2018/","doi":"10.5194/bg-15-6867-2018","abstract":"\\textlessp\\textgreater\\textlessstrong\\textgreaterAbstract.\\textless/strong\\textgreater In contrast to numerous studies on the dynamics of dissolved ( < 0.45\\textlessspan class=\"thinspace\"\\textgreater\\textless/span\\textgreaterµm) elements in permafrost-affected high-latitude rivers, very little is known of the behavior of river suspended ( > 0.45\\textlessspan class=\"thinspace\"\\textgreater\\textless/span\\textgreaterµm) matter (RSM) in these regions. In order to test the effect of climate, permafrost and physio-geographical landscape parameters (bogs, forest and lake coverage of the watershed) on RSM and particulate C, N and P concentrations in river water, we sampled 33 small and medium-sized rivers (10–100\\textlessspan class=\"thinspace\"\\textgreater\\textless/span\\textgreater000\\textlessspan class=\"thinspace\"\\textgreater\\textless/span\\textgreaterkm$^{\\textrm{2}}$ watershed) along a 1700\\textlessspan class=\"thinspace\"\\textgreater\\textless/span\\textgreaterkm N–S transect including both permafrost-affected and permafrost-free zones of the Western Siberian Lowland (WSL). The concentrations of C and N in RSM decreased with the increase in river watershed size, illustrating (i) the importance of organic debris in small rivers which drain peatlands and (ii) the role of mineral matter from bank abrasion in larger rivers. The presence of lakes in the watershed increased C and N but decreased P concentrations in the RSM. The C : N ratio in the RSM reflected the source from the deep soil horizon rather than surface soil horizon, similar to that of other Arctic rivers. This suggests the export of peat and mineral particles through suprapermafrost flow occurring at the base of the active layer. There was a maximum of both particulate C and N concentrations and export fluxes at the beginning of permafrost appearance, in the sporadic and discontinuous zone (62–64°\\textlessspan class=\"thinspace\"\\textgreater\\textless/span\\textgreaterN). This presumably reflected the organic matter mobilization from newly thawed organic horizons in soils at the active latitudinal thawing front. The results suggest that a northward shift of permafrost boundaries and an increase in active layer thickness may increase particulate C and N export by WSL rivers to the Arctic Ocean by a factor of 2, while P export may remain unchanged. 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The presence of lakes in the watershed increased C and N but decreased P concentrations in the RSM. The C : N ratio in the RSM reflected the source from the deep soil horizon rather than surface soil horizon, similar to that of other Arctic rivers. This suggests the export of peat and mineral particles through suprapermafrost flow occurring at the base of the active layer. There was a maximum of both particulate C and N concentrations and export fluxes at the beginning of permafrost appearance, in the sporadic and discontinuous zone (62–64°{\\textless}span class=\"thinspace\"{\\textgreater}{\\textless}/span{\\textgreater}N). This presumably reflected the organic matter mobilization from newly thawed organic horizons in soils at the active latitudinal thawing front. 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