Freshwater discharges in a simulation of the Last Glacial Maximum climate using improved river routing
International audience The large ice‐sheets over North America and Europe at the Last Glacial Maximum (LGM) strongly disturbed river pathways. This has never been taken into account in simulations of the LGM climate, even if it could have an impact on the freshwater input to the ocean. Here, we have...
Published in: | Geophysical Research Letters |
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Online Access: | https://hal.science/hal-02930367 https://hal.science/hal-02930367/document https://hal.science/hal-02930367/file/2006GL027746.pdf https://doi.org/10.1029/2006GL027746 |
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ftuniversailles:oai:HAL:hal-02930367v1 2024-04-28T08:08:47+00:00 Freshwater discharges in a simulation of the Last Glacial Maximum climate using improved river routing Alkama, R. Kageyama, M. Ramstein, G. Laboratoire des Sciences du Climat et de l'Environnement Gif-sur-Yvette (LSCE) Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)) Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA) Modélisation du climat (CLIM) Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)) 2006 https://hal.science/hal-02930367 https://hal.science/hal-02930367/document https://hal.science/hal-02930367/file/2006GL027746.pdf https://doi.org/10.1029/2006GL027746 en eng HAL CCSD American Geophysical Union info:eu-repo/semantics/altIdentifier/doi/10.1029/2006GL027746 hal-02930367 https://hal.science/hal-02930367 https://hal.science/hal-02930367/document https://hal.science/hal-02930367/file/2006GL027746.pdf doi:10.1029/2006GL027746 info:eu-repo/semantics/OpenAccess ISSN: 0094-8276 EISSN: 1944-8007 Geophysical Research Letters https://hal.science/hal-02930367 Geophysical Research Letters, 2006, 33 (21), pp.L21709. ⟨10.1029/2006GL027746⟩ [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology [SDU.STU.HY]Sciences of the Universe [physics]/Earth Sciences/Hydrology info:eu-repo/semantics/article Journal articles 2006 ftuniversailles https://doi.org/10.1029/2006GL027746 2024-04-04T17:36:17Z International audience The large ice‐sheets over North America and Europe at the Last Glacial Maximum (LGM) strongly disturbed river pathways. This has never been taken into account in simulations of the LGM climate, even if it could have an impact on the freshwater input to the ocean. Here, we have introduced a more realistic river routing in LGM atmospheric general circulation model simulations. A comparison with classical LGM simulations shows that the discharge into the Arctic Ocean is not drastically different. Even if the Ob and Yenisei rivers could not reach the Arctic Ocean because of the Fennoscandian ice sheet (which results in a lake South of this ice sheet), the discharge of other rivers nearby is increased due to the influence of this lake. The maximum monthly discharge into the North Atlantic Ocean decreases by 34000 m3/s between 54 and 66°N, while it is stronger by 35000 m3/s between 28 and 54°N. Article in Journal/Newspaper Arctic Arctic Ocean Fennoscandian Ice Sheet North Atlantic Université de Versailles Saint-Quentin-en-Yvelines: HAL-UVSQ Geophysical Research Letters 33 21 |
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Open Polar |
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Université de Versailles Saint-Quentin-en-Yvelines: HAL-UVSQ |
op_collection_id |
ftuniversailles |
language |
English |
topic |
[SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology [SDU.STU.HY]Sciences of the Universe [physics]/Earth Sciences/Hydrology |
spellingShingle |
[SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology [SDU.STU.HY]Sciences of the Universe [physics]/Earth Sciences/Hydrology Alkama, R. Kageyama, M. Ramstein, G. Freshwater discharges in a simulation of the Last Glacial Maximum climate using improved river routing |
topic_facet |
[SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology [SDU.STU.HY]Sciences of the Universe [physics]/Earth Sciences/Hydrology |
description |
International audience The large ice‐sheets over North America and Europe at the Last Glacial Maximum (LGM) strongly disturbed river pathways. This has never been taken into account in simulations of the LGM climate, even if it could have an impact on the freshwater input to the ocean. Here, we have introduced a more realistic river routing in LGM atmospheric general circulation model simulations. A comparison with classical LGM simulations shows that the discharge into the Arctic Ocean is not drastically different. Even if the Ob and Yenisei rivers could not reach the Arctic Ocean because of the Fennoscandian ice sheet (which results in a lake South of this ice sheet), the discharge of other rivers nearby is increased due to the influence of this lake. The maximum monthly discharge into the North Atlantic Ocean decreases by 34000 m3/s between 54 and 66°N, while it is stronger by 35000 m3/s between 28 and 54°N. |
author2 |
Laboratoire des Sciences du Climat et de l'Environnement Gif-sur-Yvette (LSCE) Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)) Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA) Modélisation du climat (CLIM) Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)) |
format |
Article in Journal/Newspaper |
author |
Alkama, R. Kageyama, M. Ramstein, G. |
author_facet |
Alkama, R. Kageyama, M. Ramstein, G. |
author_sort |
Alkama, R. |
title |
Freshwater discharges in a simulation of the Last Glacial Maximum climate using improved river routing |
title_short |
Freshwater discharges in a simulation of the Last Glacial Maximum climate using improved river routing |
title_full |
Freshwater discharges in a simulation of the Last Glacial Maximum climate using improved river routing |
title_fullStr |
Freshwater discharges in a simulation of the Last Glacial Maximum climate using improved river routing |
title_full_unstemmed |
Freshwater discharges in a simulation of the Last Glacial Maximum climate using improved river routing |
title_sort |
freshwater discharges in a simulation of the last glacial maximum climate using improved river routing |
publisher |
HAL CCSD |
publishDate |
2006 |
url |
https://hal.science/hal-02930367 https://hal.science/hal-02930367/document https://hal.science/hal-02930367/file/2006GL027746.pdf https://doi.org/10.1029/2006GL027746 |
genre |
Arctic Arctic Ocean Fennoscandian Ice Sheet North Atlantic |
genre_facet |
Arctic Arctic Ocean Fennoscandian Ice Sheet North Atlantic |
op_source |
ISSN: 0094-8276 EISSN: 1944-8007 Geophysical Research Letters https://hal.science/hal-02930367 Geophysical Research Letters, 2006, 33 (21), pp.L21709. ⟨10.1029/2006GL027746⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1029/2006GL027746 hal-02930367 https://hal.science/hal-02930367 https://hal.science/hal-02930367/document https://hal.science/hal-02930367/file/2006GL027746.pdf doi:10.1029/2006GL027746 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1029/2006GL027746 |
container_title |
Geophysical Research Letters |
container_volume |
33 |
container_issue |
21 |
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1797577410318696448 |