A Downscaling Approach Toward High-Resolution Surface Mass Balance Over Antarctica
International audience The Antarctic ice sheet surface mass balance shows high spatial variability over the coastal area. As state-of-the-art climate models usually require coarse resolutions to keep computational costs to a moderate level, they miss some local features that can be captured by field...
Published in: | Surveys in Geophysics |
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Main Authors: | , , , , |
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Format: | Article in Journal/Newspaper |
Language: | English |
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HAL CCSD
2011
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Online Access: | https://insu.hal.science/insu-00646979 https://doi.org/10.1007/s10712-011-9125-3 |
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ftinsu:oai:HAL:insu-00646979v1 |
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Open Polar |
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Institut national des sciences de l'Univers: HAL-INSU |
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ftinsu |
language |
English |
topic |
Net accumulation Downscaling Antarctica Law Dome [SDU.STU.GM]Sciences of the Universe [physics]/Earth Sciences/Geomorphology |
spellingShingle |
Net accumulation Downscaling Antarctica Law Dome [SDU.STU.GM]Sciences of the Universe [physics]/Earth Sciences/Geomorphology Gallee, H. Agosta, C. Gential, L. Favier, V. Krinner, G. A Downscaling Approach Toward High-Resolution Surface Mass Balance Over Antarctica |
topic_facet |
Net accumulation Downscaling Antarctica Law Dome [SDU.STU.GM]Sciences of the Universe [physics]/Earth Sciences/Geomorphology |
description |
International audience The Antarctic ice sheet surface mass balance shows high spatial variability over the coastal area. As state-of-the-art climate models usually require coarse resolutions to keep computational costs to a moderate level, they miss some local features that can be captured by field measurements. The downscaling approach adopted here consists of using a cascade of atmospheric models from large scale to meso-γ scale. A regional climate model (Modèle Atmosphérique Régional) forced by meteorological reanalyses provides a diagnostic physically-based rain- and snowfall downscaling model with meteorological fields at the regional scale. Although the parameterizations invoked by the downscaling model are fairly simple, the knowledge of small-scale topography significantly improves the representation of spatial variability of precipitation and therefore that of the surface mass balance. Model evaluation is carried out with the help of shallow firn cores and snow height measurements provided by automatic weather stations. Although downscaling of blowing snow still needs to be implemented in the model, the net accumulation gradient across Law Dome summit is shown to be induced mostly by orographic effects on precipitation. |
author2 |
CLIPS 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)-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) European Project: 226375,EC:FP7:ENV,FP7-ENV-2008-1,ICE2SEA(2009) |
format |
Article in Journal/Newspaper |
author |
Gallee, H. Agosta, C. Gential, L. Favier, V. Krinner, G. |
author_facet |
Gallee, H. Agosta, C. Gential, L. Favier, V. Krinner, G. |
author_sort |
Gallee, H. |
title |
A Downscaling Approach Toward High-Resolution Surface Mass Balance Over Antarctica |
title_short |
A Downscaling Approach Toward High-Resolution Surface Mass Balance Over Antarctica |
title_full |
A Downscaling Approach Toward High-Resolution Surface Mass Balance Over Antarctica |
title_fullStr |
A Downscaling Approach Toward High-Resolution Surface Mass Balance Over Antarctica |
title_full_unstemmed |
A Downscaling Approach Toward High-Resolution Surface Mass Balance Over Antarctica |
title_sort |
downscaling approach toward high-resolution surface mass balance over antarctica |
publisher |
HAL CCSD |
publishDate |
2011 |
url |
https://insu.hal.science/insu-00646979 https://doi.org/10.1007/s10712-011-9125-3 |
genre |
Antarc* Antarctic Antarctica Ice Sheet |
genre_facet |
Antarc* Antarctic Antarctica Ice Sheet |
op_source |
ISSN: 0169-3298 EISSN: 1573-0956 Surveys in Geophysics https://insu.hal.science/insu-00646979 Surveys in Geophysics, 2011, 32 (4-5), pp.507-518. ⟨10.1007/s10712-011-9125-3⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1007/s10712-011-9125-3 info:eu-repo/grantAgreement/EC/FP7/226375/EU/Ice2sea - estimating the future contribution of continental ice to sea-level rise/ICE2SEA insu-00646979 https://insu.hal.science/insu-00646979 doi:10.1007/s10712-011-9125-3 |
op_doi |
https://doi.org/10.1007/s10712-011-9125-3 |
container_title |
Surveys in Geophysics |
container_volume |
32 |
container_issue |
4-5 |
container_start_page |
507 |
op_container_end_page |
518 |
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1797573581598621696 |
spelling |
ftinsu:oai:HAL:insu-00646979v1 2024-04-28T08:02:07+00:00 A Downscaling Approach Toward High-Resolution Surface Mass Balance Over Antarctica Gallee, H. Agosta, C. Gential, L. Favier, V. Krinner, G. CLIPS 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)-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) European Project: 226375,EC:FP7:ENV,FP7-ENV-2008-1,ICE2SEA(2009) 2011-05-28 https://insu.hal.science/insu-00646979 https://doi.org/10.1007/s10712-011-9125-3 en eng HAL CCSD Springer Verlag (Germany) info:eu-repo/semantics/altIdentifier/doi/10.1007/s10712-011-9125-3 info:eu-repo/grantAgreement/EC/FP7/226375/EU/Ice2sea - estimating the future contribution of continental ice to sea-level rise/ICE2SEA insu-00646979 https://insu.hal.science/insu-00646979 doi:10.1007/s10712-011-9125-3 ISSN: 0169-3298 EISSN: 1573-0956 Surveys in Geophysics https://insu.hal.science/insu-00646979 Surveys in Geophysics, 2011, 32 (4-5), pp.507-518. ⟨10.1007/s10712-011-9125-3⟩ Net accumulation Downscaling Antarctica Law Dome [SDU.STU.GM]Sciences of the Universe [physics]/Earth Sciences/Geomorphology info:eu-repo/semantics/article Journal articles 2011 ftinsu https://doi.org/10.1007/s10712-011-9125-3 2024-04-05T00:24:13Z International audience The Antarctic ice sheet surface mass balance shows high spatial variability over the coastal area. As state-of-the-art climate models usually require coarse resolutions to keep computational costs to a moderate level, they miss some local features that can be captured by field measurements. The downscaling approach adopted here consists of using a cascade of atmospheric models from large scale to meso-γ scale. A regional climate model (Modèle Atmosphérique Régional) forced by meteorological reanalyses provides a diagnostic physically-based rain- and snowfall downscaling model with meteorological fields at the regional scale. Although the parameterizations invoked by the downscaling model are fairly simple, the knowledge of small-scale topography significantly improves the representation of spatial variability of precipitation and therefore that of the surface mass balance. Model evaluation is carried out with the help of shallow firn cores and snow height measurements provided by automatic weather stations. Although downscaling of blowing snow still needs to be implemented in the model, the net accumulation gradient across Law Dome summit is shown to be induced mostly by orographic effects on precipitation. Article in Journal/Newspaper Antarc* Antarctic Antarctica Ice Sheet Institut national des sciences de l'Univers: HAL-INSU Surveys in Geophysics 32 4-5 507 518 |