Modelling of Last Glacial Maximum ice sheets using different accumulation parameterizations
International audience We use a three-dimensional thermomechanical ice-sheet model, previously tested on the Greenland ice sheet, to reconstruct Last Glacial Maximum (LGM) ice sheets. We compare the effects on the results of the ice-sheet model of three different accumulation parameterization scheme...
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ftunivnantes:oai:HAL:hal-03011909v1 2023-05-15T13:29:14+02:00 Modelling of Last Glacial Maximum ice sheets using different accumulation parameterizations Fabre, Adeline Ritz, Catherine Ramstein, Gilles 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 de Modélisation du Climat et de l'Environnement (LMCE) 1997 https://hal.science/hal-03011909 https://hal.science/hal-03011909/document https://hal.science/hal-03011909/file/annglacio.pdf https://doi.org/10.3189/S0260305500012210 en eng HAL CCSD Cambridge University Press info:eu-repo/semantics/altIdentifier/doi/10.3189/S0260305500012210 hal-03011909 https://hal.science/hal-03011909 https://hal.science/hal-03011909/document https://hal.science/hal-03011909/file/annglacio.pdf doi:10.3189/S0260305500012210 info:eu-repo/semantics/OpenAccess ISSN: 0260-3055 EISSN: 1727-5644 Annals of Glaciology https://hal.science/hal-03011909 Annals of Glaciology, 1997, 24, pp.223-228. ⟨10.3189/S0260305500012210⟩ [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 1997 ftunivnantes https://doi.org/10.3189/S0260305500012210 2023-03-01T02:47:14Z International audience We use a three-dimensional thermomechanical ice-sheet model, previously tested on the Greenland ice sheet, to reconstruct Last Glacial Maximum (LGM) ice sheets. We compare the effects on the results of the ice-sheet model of three different accumulation parameterization schemes. In the first and second schemes, LGM precipitation is computed from the present precipitation, taking and not taking into account moisture transport. In the third scheme, LGM precipitation and surface temperatures are computed using outputs of an atmospheric global circulation model (AGCM), treated in anomaly mode.Results are compared to the last reconstruction of the Northern Hemisphere ice sheets (Peltier, 1994), computed using global rebound rates in a visco-elastic model of the Earth’s crust. The first two accumulation parameterizations do not give satisfactory reconstructions of the LGM ice sheets, since they are unable to compute realistic LGM climatic conditions. The third method gives very satisfactory results, which leads us to conclude that the best way to obtain realistic LGM climatic conditions is to use AGCM outputs. Article in Journal/Newspaper Annals of Glaciology Greenland Ice Sheet Université de Nantes: HAL-UNIV-NANTES Greenland Peltier ENVELOPE(-63.495,-63.495,-64.854,-64.854) Annals of Glaciology 24 223 228 |
institution |
Open Polar |
collection |
Université de Nantes: HAL-UNIV-NANTES |
op_collection_id |
ftunivnantes |
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 Fabre, Adeline Ritz, Catherine Ramstein, Gilles Modelling of Last Glacial Maximum ice sheets using different accumulation parameterizations |
topic_facet |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment |
description |
International audience We use a three-dimensional thermomechanical ice-sheet model, previously tested on the Greenland ice sheet, to reconstruct Last Glacial Maximum (LGM) ice sheets. We compare the effects on the results of the ice-sheet model of three different accumulation parameterization schemes. In the first and second schemes, LGM precipitation is computed from the present precipitation, taking and not taking into account moisture transport. In the third scheme, LGM precipitation and surface temperatures are computed using outputs of an atmospheric global circulation model (AGCM), treated in anomaly mode.Results are compared to the last reconstruction of the Northern Hemisphere ice sheets (Peltier, 1994), computed using global rebound rates in a visco-elastic model of the Earth’s crust. The first two accumulation parameterizations do not give satisfactory reconstructions of the LGM ice sheets, since they are unable to compute realistic LGM climatic conditions. The third method gives very satisfactory results, which leads us to conclude that the best way to obtain realistic LGM climatic conditions is to use AGCM outputs. |
author2 |
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 de Modélisation du Climat et de l'Environnement (LMCE) |
format |
Article in Journal/Newspaper |
author |
Fabre, Adeline Ritz, Catherine Ramstein, Gilles |
author_facet |
Fabre, Adeline Ritz, Catherine Ramstein, Gilles |
author_sort |
Fabre, Adeline |
title |
Modelling of Last Glacial Maximum ice sheets using different accumulation parameterizations |
title_short |
Modelling of Last Glacial Maximum ice sheets using different accumulation parameterizations |
title_full |
Modelling of Last Glacial Maximum ice sheets using different accumulation parameterizations |
title_fullStr |
Modelling of Last Glacial Maximum ice sheets using different accumulation parameterizations |
title_full_unstemmed |
Modelling of Last Glacial Maximum ice sheets using different accumulation parameterizations |
title_sort |
modelling of last glacial maximum ice sheets using different accumulation parameterizations |
publisher |
HAL CCSD |
publishDate |
1997 |
url |
https://hal.science/hal-03011909 https://hal.science/hal-03011909/document https://hal.science/hal-03011909/file/annglacio.pdf https://doi.org/10.3189/S0260305500012210 |
long_lat |
ENVELOPE(-63.495,-63.495,-64.854,-64.854) |
geographic |
Greenland Peltier |
geographic_facet |
Greenland Peltier |
genre |
Annals of Glaciology Greenland Ice Sheet |
genre_facet |
Annals of Glaciology Greenland Ice Sheet |
op_source |
ISSN: 0260-3055 EISSN: 1727-5644 Annals of Glaciology https://hal.science/hal-03011909 Annals of Glaciology, 1997, 24, pp.223-228. ⟨10.3189/S0260305500012210⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.3189/S0260305500012210 hal-03011909 https://hal.science/hal-03011909 https://hal.science/hal-03011909/document https://hal.science/hal-03011909/file/annglacio.pdf doi:10.3189/S0260305500012210 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.3189/S0260305500012210 |
container_title |
Annals of Glaciology |
container_volume |
24 |
container_start_page |
223 |
op_container_end_page |
228 |
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1765999420606775296 |