Modelling snow accumulation on Greenland in Eemian, glacial inception, and modern climates in a GCM
International audience Changing climate conditions on Greenland influence the snow accumulation rate and surface mass balance (SMB) on the ice sheet and, ultimately, its shape. This can in turn affect local climate via orography and albedo variations and, potentially, remote areas via changes in oce...
Published in: | Climate of the Past |
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Main Authors: | , , , |
Other Authors: | , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
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HAL CCSD
2012
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Online Access: | https://hal-insu.archives-ouvertes.fr/insu-00844038 https://hal-insu.archives-ouvertes.fr/insu-00844038/document https://hal-insu.archives-ouvertes.fr/insu-00844038/file/cp-8-1801-2012.pdf https://doi.org/10.5194/cp-8-1801-2012 |
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Université de Nantes: HAL-UNIV-NANTES |
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English |
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[SDU.STU]Sciences of the Universe [physics]/Earth Sciences |
spellingShingle |
[SDU.STU]Sciences of the Universe [physics]/Earth Sciences Punge, H. J. Gallée, H. Kageyama, M. Krinner, G. Modelling snow accumulation on Greenland in Eemian, glacial inception, and modern climates in a GCM |
topic_facet |
[SDU.STU]Sciences of the Universe [physics]/Earth Sciences |
description |
International audience Changing climate conditions on Greenland influence the snow accumulation rate and surface mass balance (SMB) on the ice sheet and, ultimately, its shape. This can in turn affect local climate via orography and albedo variations and, potentially, remote areas via changes in ocean circulation triggered by melt water or calving from the ice sheet. Examining these interactions in the IPSL global model requires improving the representation of snow at the ice sheet surface. In this paper, we present a new snow scheme implemented in LMDZ, the atmospheric component of the IPSL coupled model. We analyse surface climate and SMB on the Greenland ice sheet under insolation and oceanic boundary conditions for modern, but also for two different past climates, the last glacial inception (115 kyr BP) and the Eemian (126 kyr BP). While being limited by the low resolution of the general circulation model (GCM), present-day SMB is on the same order of magnitude as recent regional model findings. It is affected by a moist bias of the GCM in Western Greenland and a dry bias in the north-east. Under Eemian conditions, the SMB decreases largely, and melting affects areas in which the ice sheet surface is today at high altitude, including recent ice core drilling sites as NEEM. In contrast, glacial inception conditions lead to a higher mass balance overall due to the reduced melting in the colder summer climate. Compared to the widely applied positive degree-day (PDD) parameterization of SMB, our direct modelling results suggest a weaker sensitivity of SMB to changing climatic forcing. For the Eemian climate, our model simulations using interannually varying monthly mean forcings for the ocean surface temperature and sea ice cover lead to significantly higher SMB in southern Greenland compared to simulations forced with climatological monthly means. |
author2 |
Institute for Meteorology and Climate Research (IMK) Karlsruhe Institute of Technology (KIT) Laboratoire de glaciologie et géophysique de l'environnement (LGGE) Observatoire des Sciences de l'Univers de Grenoble (OSUG) Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS) Laboratoire des Sciences du Climat et de l'Environnement Gif-sur-Yvette (LSCE) Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS) Modélisation du climat (CLIM) Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS) |
format |
Article in Journal/Newspaper |
author |
Punge, H. J. Gallée, H. Kageyama, M. Krinner, G. |
author_facet |
Punge, H. J. Gallée, H. Kageyama, M. Krinner, G. |
author_sort |
Punge, H. J. |
title |
Modelling snow accumulation on Greenland in Eemian, glacial inception, and modern climates in a GCM |
title_short |
Modelling snow accumulation on Greenland in Eemian, glacial inception, and modern climates in a GCM |
title_full |
Modelling snow accumulation on Greenland in Eemian, glacial inception, and modern climates in a GCM |
title_fullStr |
Modelling snow accumulation on Greenland in Eemian, glacial inception, and modern climates in a GCM |
title_full_unstemmed |
Modelling snow accumulation on Greenland in Eemian, glacial inception, and modern climates in a GCM |
title_sort |
modelling snow accumulation on greenland in eemian, glacial inception, and modern climates in a gcm |
publisher |
HAL CCSD |
publishDate |
2012 |
url |
https://hal-insu.archives-ouvertes.fr/insu-00844038 https://hal-insu.archives-ouvertes.fr/insu-00844038/document https://hal-insu.archives-ouvertes.fr/insu-00844038/file/cp-8-1801-2012.pdf https://doi.org/10.5194/cp-8-1801-2012 |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland ice core Ice Sheet Sea ice |
genre_facet |
Greenland ice core Ice Sheet Sea ice |
op_source |
ISSN: 1814-9324 EISSN: 1814-9332 Climate of the Past https://hal-insu.archives-ouvertes.fr/insu-00844038 Climate of the Past, 2012, 8, pp.1801- 1819. ⟨10.5194/cp-8-1801-2012⟩ |
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op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.5194/cp-8-1801-2012 |
container_title |
Climate of the Past |
container_volume |
8 |
container_issue |
6 |
container_start_page |
1801 |
op_container_end_page |
1819 |
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1766015544218091520 |
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ftunivnantes:oai:HAL:insu-00844038v1 2023-05-15T16:26:36+02:00 Modelling snow accumulation on Greenland in Eemian, glacial inception, and modern climates in a GCM Punge, H. J. Gallée, H. Kageyama, M. Krinner, G. Institute for Meteorology and Climate Research (IMK) Karlsruhe Institute of Technology (KIT) Laboratoire de glaciologie et géophysique de l'environnement (LGGE) Observatoire des Sciences de l'Univers de Grenoble (OSUG) Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS) Laboratoire des Sciences du Climat et de l'Environnement Gif-sur-Yvette (LSCE) Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS) Modélisation du climat (CLIM) Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS) 2012-11-05 https://hal-insu.archives-ouvertes.fr/insu-00844038 https://hal-insu.archives-ouvertes.fr/insu-00844038/document https://hal-insu.archives-ouvertes.fr/insu-00844038/file/cp-8-1801-2012.pdf https://doi.org/10.5194/cp-8-1801-2012 en eng HAL CCSD European Geosciences Union (EGU) info:eu-repo/semantics/altIdentifier/doi/10.5194/cp-8-1801-2012 insu-00844038 https://hal-insu.archives-ouvertes.fr/insu-00844038 https://hal-insu.archives-ouvertes.fr/insu-00844038/document https://hal-insu.archives-ouvertes.fr/insu-00844038/file/cp-8-1801-2012.pdf doi:10.5194/cp-8-1801-2012 info:eu-repo/semantics/OpenAccess ISSN: 1814-9324 EISSN: 1814-9332 Climate of the Past https://hal-insu.archives-ouvertes.fr/insu-00844038 Climate of the Past, 2012, 8, pp.1801- 1819. ⟨10.5194/cp-8-1801-2012⟩ [SDU.STU]Sciences of the Universe [physics]/Earth Sciences info:eu-repo/semantics/article Journal articles 2012 ftunivnantes https://doi.org/10.5194/cp-8-1801-2012 2023-03-01T00:00:08Z International audience Changing climate conditions on Greenland influence the snow accumulation rate and surface mass balance (SMB) on the ice sheet and, ultimately, its shape. This can in turn affect local climate via orography and albedo variations and, potentially, remote areas via changes in ocean circulation triggered by melt water or calving from the ice sheet. Examining these interactions in the IPSL global model requires improving the representation of snow at the ice sheet surface. In this paper, we present a new snow scheme implemented in LMDZ, the atmospheric component of the IPSL coupled model. We analyse surface climate and SMB on the Greenland ice sheet under insolation and oceanic boundary conditions for modern, but also for two different past climates, the last glacial inception (115 kyr BP) and the Eemian (126 kyr BP). While being limited by the low resolution of the general circulation model (GCM), present-day SMB is on the same order of magnitude as recent regional model findings. It is affected by a moist bias of the GCM in Western Greenland and a dry bias in the north-east. Under Eemian conditions, the SMB decreases largely, and melting affects areas in which the ice sheet surface is today at high altitude, including recent ice core drilling sites as NEEM. In contrast, glacial inception conditions lead to a higher mass balance overall due to the reduced melting in the colder summer climate. Compared to the widely applied positive degree-day (PDD) parameterization of SMB, our direct modelling results suggest a weaker sensitivity of SMB to changing climatic forcing. For the Eemian climate, our model simulations using interannually varying monthly mean forcings for the ocean surface temperature and sea ice cover lead to significantly higher SMB in southern Greenland compared to simulations forced with climatological monthly means. Article in Journal/Newspaper Greenland ice core Ice Sheet Sea ice Université de Nantes: HAL-UNIV-NANTES Greenland Climate of the Past 8 6 1801 1819 |