Riverine particulate C and N generated at the permafrost thaw front: case study of western Siberian rivers across a 1700 km latitudinal transect
International audience In contrast to numerous studies on the dynamics of dissolved ( < 0.45 µm) elements in permafrost-affected high-latitude rivers, very little is known of the behavior of river suspended ( > 0.45 µm) matter (RSM) in these regions. In order to test the effect of climate, per...
Published in: | Biogeosciences |
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Main Authors: | , , , , , , , |
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Format: | Article in Journal/Newspaper |
Language: | English |
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HAL CCSD
2018
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Online Access: | https://insu.hal.science/insu-03661391 https://insu.hal.science/insu-03661391/document https://insu.hal.science/insu-03661391/file/bg-15-6867-2018.pdf https://doi.org/10.5194/bg-15-6867-2018 |
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Open Polar |
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Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
op_collection_id |
ftccsdartic |
language |
English |
topic |
[SDU]Sciences of the Universe [physics] |
spellingShingle |
[SDU]Sciences of the Universe [physics] Krickov, Ivan V. Lim, Artem G. Manasypov, Rinat M. Loiko, Sergey V. Shirokova, Liudmila S. Kirpotin, Sergey N. Karlsson, Jan Pokrovsky, Oleg S. Riverine particulate C and N generated at the permafrost thaw front: case study of western Siberian rivers across a 1700 km latitudinal transect |
topic_facet |
[SDU]Sciences of the Universe [physics] |
description |
International audience In contrast to numerous studies on the dynamics of dissolved ( < 0.45 µm) elements in permafrost-affected high-latitude rivers, very little is known of the behavior of river suspended ( > 0.45 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 (10-100 000 km 2 watershed) along a 1700 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° 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 ... |
author2 |
Géosciences Environnement Toulouse (GET) Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3) Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP) Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France-Centre National de la Recherche Scientifique (CNRS) |
format |
Article in Journal/Newspaper |
author |
Krickov, Ivan V. Lim, Artem G. Manasypov, Rinat M. Loiko, Sergey V. Shirokova, Liudmila S. Kirpotin, Sergey N. Karlsson, Jan Pokrovsky, Oleg S. |
author_facet |
Krickov, Ivan V. Lim, Artem G. Manasypov, Rinat M. Loiko, Sergey V. Shirokova, Liudmila S. Kirpotin, Sergey N. Karlsson, Jan Pokrovsky, Oleg S. |
author_sort |
Krickov, Ivan V. |
title |
Riverine particulate C and N generated at the permafrost thaw front: case study of western Siberian rivers across a 1700 km latitudinal transect |
title_short |
Riverine particulate C and N generated at the permafrost thaw front: case study of western Siberian rivers across a 1700 km latitudinal transect |
title_full |
Riverine particulate C and N generated at the permafrost thaw front: case study of western Siberian rivers across a 1700 km latitudinal transect |
title_fullStr |
Riverine particulate C and N generated at the permafrost thaw front: case study of western Siberian rivers across a 1700 km latitudinal transect |
title_full_unstemmed |
Riverine particulate C and N generated at the permafrost thaw front: case study of western Siberian rivers across a 1700 km latitudinal transect |
title_sort |
riverine particulate c and n generated at the permafrost thaw front: case study of western siberian rivers across a 1700 km latitudinal transect |
publisher |
HAL CCSD |
publishDate |
2018 |
url |
https://insu.hal.science/insu-03661391 https://insu.hal.science/insu-03661391/document https://insu.hal.science/insu-03661391/file/bg-15-6867-2018.pdf https://doi.org/10.5194/bg-15-6867-2018 |
geographic |
Arctic Arctic Ocean |
geographic_facet |
Arctic Arctic Ocean |
genre |
Active layer thickness Arctic Arctic Ocean permafrost |
genre_facet |
Active layer thickness Arctic Arctic Ocean permafrost |
op_source |
ISSN: 1726-4170 EISSN: 1726-4189 Biogeosciences https://insu.hal.science/insu-03661391 Biogeosciences, 2018, 15, pp.6867-6884. ⟨10.5194/bg-15-6867-2018⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.5194/bg-15-6867-2018 insu-03661391 https://insu.hal.science/insu-03661391 https://insu.hal.science/insu-03661391/document https://insu.hal.science/insu-03661391/file/bg-15-6867-2018.pdf BIBCODE: 2018BGeo.15.6867K doi:10.5194/bg-15-6867-2018 |
op_rights |
http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.5194/bg-15-6867-2018 |
container_title |
Biogeosciences |
container_volume |
15 |
container_issue |
22 |
container_start_page |
6867 |
op_container_end_page |
6884 |
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1786204107352047616 |
spelling |
ftccsdartic:oai:HAL:insu-03661391v1 2023-12-24T10:07:31+01:00 Riverine particulate C and N generated at the permafrost thaw front: case study of western Siberian rivers across a 1700 km latitudinal transect Krickov, Ivan V. Lim, Artem G. Manasypov, Rinat M. Loiko, Sergey V. Shirokova, Liudmila S. Kirpotin, Sergey N. Karlsson, Jan Pokrovsky, Oleg S. Géosciences Environnement Toulouse (GET) Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3) Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP) Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France-Centre National de la Recherche Scientifique (CNRS) 2018 https://insu.hal.science/insu-03661391 https://insu.hal.science/insu-03661391/document https://insu.hal.science/insu-03661391/file/bg-15-6867-2018.pdf https://doi.org/10.5194/bg-15-6867-2018 en eng HAL CCSD European Geosciences Union info:eu-repo/semantics/altIdentifier/doi/10.5194/bg-15-6867-2018 insu-03661391 https://insu.hal.science/insu-03661391 https://insu.hal.science/insu-03661391/document https://insu.hal.science/insu-03661391/file/bg-15-6867-2018.pdf BIBCODE: 2018BGeo.15.6867K doi:10.5194/bg-15-6867-2018 http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess ISSN: 1726-4170 EISSN: 1726-4189 Biogeosciences https://insu.hal.science/insu-03661391 Biogeosciences, 2018, 15, pp.6867-6884. ⟨10.5194/bg-15-6867-2018⟩ [SDU]Sciences of the Universe [physics] info:eu-repo/semantics/article Journal articles 2018 ftccsdartic https://doi.org/10.5194/bg-15-6867-2018 2023-11-26T00:09:25Z International audience In contrast to numerous studies on the dynamics of dissolved ( < 0.45 µm) elements in permafrost-affected high-latitude rivers, very little is known of the behavior of river suspended ( > 0.45 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 (10-100 000 km 2 watershed) along a 1700 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° 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 ... Article in Journal/Newspaper Active layer thickness Arctic Arctic Ocean permafrost Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Arctic Arctic Ocean Biogeosciences 15 22 6867 6884 |