Impact of the North American ice-sheet orography on the Last Glacial Maximum eddies and snowfall
International audience The present work evaluates the influence of the North American ice-sheet orography on the Last Glacial Maximum (LGM, 21,000 years ago) atmospheric circulation and snowfall in the northern mid-latitudes, focusing on the North Atlantic sector. Three Atmospheric General Circulati...
Published in: | Geophysical Research Letters |
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Online Access: | https://hal.science/hal-02930149 https://hal.science/hal-02930149/document https://hal.science/hal-02930149/file/1999GL011274.pdf https://doi.org/10.1029/1999GL011274 |
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ftceafr:oai:HAL:hal-02930149v1 2024-06-09T07:46:46+00:00 Impact of the North American ice-sheet orography on the Last Glacial Maximum eddies and snowfall Kageyama, Masa Valdes, Paul 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)) DEPARTMENT OF METEOROLOGY UNIVERSITY OF READING GBR University of Reading (UOR) 2000-05-15 https://hal.science/hal-02930149 https://hal.science/hal-02930149/document https://hal.science/hal-02930149/file/1999GL011274.pdf https://doi.org/10.1029/1999GL011274 en eng HAL CCSD American Geophysical Union info:eu-repo/semantics/altIdentifier/doi/10.1029/1999GL011274 hal-02930149 https://hal.science/hal-02930149 https://hal.science/hal-02930149/document https://hal.science/hal-02930149/file/1999GL011274.pdf doi:10.1029/1999GL011274 info:eu-repo/semantics/OpenAccess ISSN: 0094-8276 EISSN: 1944-8007 Geophysical Research Letters https://hal.science/hal-02930149 Geophysical Research Letters, 2000, 27 (10), pp.1515-1518. ⟨10.1029/1999GL011274⟩ [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment info:eu-repo/semantics/article Journal articles 2000 ftceafr https://doi.org/10.1029/1999GL011274 2024-05-16T14:40:27Z International audience The present work evaluates the influence of the North American ice-sheet orography on the Last Glacial Maximum (LGM, 21,000 years ago) atmospheric circulation and snowfall in the northern mid-latitudes, focusing on the North Atlantic sector. Three Atmospheric General Circulation Model experiments are analysed: a control and an LGM climate simulation, and an LGM run with "fiat" ice-sheets over northern North America. This ice-sheet orography affects lee-cyclogenesis over North America and forces differences in stationary waves and therefore in the baroclinicity of the mean flow. As a result, the Atlantic storm-track is reinforced in the "fiat ice-sheet" experiment compared to the LGM one. This, in turn, has a profound impact on snowfall over northern Europe, implying a coupling between the two ice-sheets. Article in Journal/Newspaper Ice Sheet North Atlantic HAL-CEA (Commissariat à l'énergie atomique et aux énergies alternatives) Geophysical Research Letters 27 10 1515 1518 |
institution |
Open Polar |
collection |
HAL-CEA (Commissariat à l'énergie atomique et aux énergies alternatives) |
op_collection_id |
ftceafr |
language |
English |
topic |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment |
spellingShingle |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment Kageyama, Masa Valdes, Paul Impact of the North American ice-sheet orography on the Last Glacial Maximum eddies and snowfall |
topic_facet |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment |
description |
International audience The present work evaluates the influence of the North American ice-sheet orography on the Last Glacial Maximum (LGM, 21,000 years ago) atmospheric circulation and snowfall in the northern mid-latitudes, focusing on the North Atlantic sector. Three Atmospheric General Circulation Model experiments are analysed: a control and an LGM climate simulation, and an LGM run with "fiat" ice-sheets over northern North America. This ice-sheet orography affects lee-cyclogenesis over North America and forces differences in stationary waves and therefore in the baroclinicity of the mean flow. As a result, the Atlantic storm-track is reinforced in the "fiat ice-sheet" experiment compared to the LGM one. This, in turn, has a profound impact on snowfall over northern Europe, implying a coupling between the two ice-sheets. |
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)) DEPARTMENT OF METEOROLOGY UNIVERSITY OF READING GBR University of Reading (UOR) |
format |
Article in Journal/Newspaper |
author |
Kageyama, Masa Valdes, Paul |
author_facet |
Kageyama, Masa Valdes, Paul |
author_sort |
Kageyama, Masa |
title |
Impact of the North American ice-sheet orography on the Last Glacial Maximum eddies and snowfall |
title_short |
Impact of the North American ice-sheet orography on the Last Glacial Maximum eddies and snowfall |
title_full |
Impact of the North American ice-sheet orography on the Last Glacial Maximum eddies and snowfall |
title_fullStr |
Impact of the North American ice-sheet orography on the Last Glacial Maximum eddies and snowfall |
title_full_unstemmed |
Impact of the North American ice-sheet orography on the Last Glacial Maximum eddies and snowfall |
title_sort |
impact of the north american ice-sheet orography on the last glacial maximum eddies and snowfall |
publisher |
HAL CCSD |
publishDate |
2000 |
url |
https://hal.science/hal-02930149 https://hal.science/hal-02930149/document https://hal.science/hal-02930149/file/1999GL011274.pdf https://doi.org/10.1029/1999GL011274 |
genre |
Ice Sheet North Atlantic |
genre_facet |
Ice Sheet North Atlantic |
op_source |
ISSN: 0094-8276 EISSN: 1944-8007 Geophysical Research Letters https://hal.science/hal-02930149 Geophysical Research Letters, 2000, 27 (10), pp.1515-1518. ⟨10.1029/1999GL011274⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1029/1999GL011274 hal-02930149 https://hal.science/hal-02930149 https://hal.science/hal-02930149/document https://hal.science/hal-02930149/file/1999GL011274.pdf doi:10.1029/1999GL011274 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1029/1999GL011274 |
container_title |
Geophysical Research Letters |
container_volume |
27 |
container_issue |
10 |
container_start_page |
1515 |
op_container_end_page |
1518 |
_version_ |
1801376746131423232 |