High-resolution modelling of the Antarctic surface mass balance, application for the twentieth, twenty first and twenty second centuries
International audience About 75 % of the Antarctic surface mass gain occurs over areas below 2,000 m asl, which cover 40 % of the grounded ice-sheet. As the topography is complex in many of these regions, surface mass balance modelling is highly dependent on horizontal resolution, and studying the i...
Published in: | Climate Dynamics |
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Main Authors: | , , , , , |
Other Authors: | , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
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HAL CCSD
2013
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Online Access: | https://hal.univ-grenoble-alpes.fr/hal-00926918 https://doi.org/10.1007/s00382-013-1903-9 |
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Université de Nantes: HAL-UNIV-NANTES |
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language |
English |
topic |
Antarctica Surface mass balance climate change modelling [SDE.MCG]Environmental Sciences/Global Changes |
spellingShingle |
Antarctica Surface mass balance climate change modelling [SDE.MCG]Environmental Sciences/Global Changes Agosta, Cécile Favier, V. Krinner, Gerhard Gallée, Hubert Fettweis, X. Genthon, C. High-resolution modelling of the Antarctic surface mass balance, application for the twentieth, twenty first and twenty second centuries |
topic_facet |
Antarctica Surface mass balance climate change modelling [SDE.MCG]Environmental Sciences/Global Changes |
description |
International audience About 75 % of the Antarctic surface mass gain occurs over areas below 2,000 m asl, which cover 40 % of the grounded ice-sheet. As the topography is complex in many of these regions, surface mass balance modelling is highly dependent on horizontal resolution, and studying the impact of Antarctica on the future rise in sea level requires physical approaches. We have developed a computationally efficient, physical downscaling model for high-resolution (15 km) long-term surface mass balance (SMB) projections. Here, we present results of this model, called SMHiL (surface mass balance high-resolution downscaling), which was forced with the LMDZ4 atmospheric general circulation model to assess Antarctic SMB variability in the twenty first and the twenty second centuries under two different scenarios. The higher resolution of SMHiL better reproduces the geographical patterns of SMB and increase significantly the averaged SMB over the grounded ice-sheet for the end of the twentieth century. A comparison with more than 3200 quality-controlled field data shows that LMDZ4 and SMHiL reproduce the observed values equally well. Nevertheless, field data below 2,000 m asl are too scarce to efficiently show the added value of SMHiL and measuring the SMB in these undocumented areas should be a future scientific priority. Our results suggest that running LMDZ4 at a finer resolution (15 km) may give a future increase in SMB in Antarctica that is about 30 % higher than by using its standard resolution (60 km) due to the higher increase in precipitation in coastal areas at 15 km. However, a part (∼15 %) of these discrepancies could be an artefact from SMHiL since it neglects the foehn effect and likely overestimates the precipitation increase. Future changes in the Antarctic SMB at low elevations will result from the competition between higher snow accumulation and runoff. For this reason, developing downscaling models is crucial to represent processes in sufficient detail and correctly model the SMB in ... |
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) Département de Géographie European Project: 226375,EC:FP7:ENV,FP7-ENV-2008-1,ICE2SEA(2009) |
format |
Article in Journal/Newspaper |
author |
Agosta, Cécile Favier, V. Krinner, Gerhard Gallée, Hubert Fettweis, X. Genthon, C. |
author_facet |
Agosta, Cécile Favier, V. Krinner, Gerhard Gallée, Hubert Fettweis, X. Genthon, C. |
author_sort |
Agosta, Cécile |
title |
High-resolution modelling of the Antarctic surface mass balance, application for the twentieth, twenty first and twenty second centuries |
title_short |
High-resolution modelling of the Antarctic surface mass balance, application for the twentieth, twenty first and twenty second centuries |
title_full |
High-resolution modelling of the Antarctic surface mass balance, application for the twentieth, twenty first and twenty second centuries |
title_fullStr |
High-resolution modelling of the Antarctic surface mass balance, application for the twentieth, twenty first and twenty second centuries |
title_full_unstemmed |
High-resolution modelling of the Antarctic surface mass balance, application for the twentieth, twenty first and twenty second centuries |
title_sort |
high-resolution modelling of the antarctic surface mass balance, application for the twentieth, twenty first and twenty second centuries |
publisher |
HAL CCSD |
publishDate |
2013 |
url |
https://hal.univ-grenoble-alpes.fr/hal-00926918 https://doi.org/10.1007/s00382-013-1903-9 |
geographic |
Antarctic The Antarctic |
geographic_facet |
Antarctic The Antarctic |
genre |
Antarc* Antarctic Antarctica Ice Sheet |
genre_facet |
Antarc* Antarctic Antarctica Ice Sheet |
op_source |
ISSN: 0930-7575 EISSN: 1432-0894 Climate Dynamics https://hal.univ-grenoble-alpes.fr/hal-00926918 Climate Dynamics, 2013, 41 (11-12), pp.3247-3260. ⟨10.1007/s00382-013-1903-9⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1007/s00382-013-1903-9 info:eu-repo/grantAgreement/EC/FP7/226375/EU/Ice2sea - estimating the future contribution of continental ice to sea-level rise/ICE2SEA hal-00926918 https://hal.univ-grenoble-alpes.fr/hal-00926918 doi:10.1007/s00382-013-1903-9 |
op_doi |
https://doi.org/10.1007/s00382-013-1903-9 |
container_title |
Climate Dynamics |
container_volume |
41 |
container_issue |
11-12 |
container_start_page |
3247 |
op_container_end_page |
3260 |
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1766257068695617536 |
spelling |
ftunivnantes:oai:HAL:hal-00926918v1 2023-05-15T13:52:38+02:00 High-resolution modelling of the Antarctic surface mass balance, application for the twentieth, twenty first and twenty second centuries Agosta, Cécile Favier, V. Krinner, Gerhard Gallée, Hubert Fettweis, X. Genthon, C. 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) Département de Géographie European Project: 226375,EC:FP7:ENV,FP7-ENV-2008-1,ICE2SEA(2009) 2013-12-01 https://hal.univ-grenoble-alpes.fr/hal-00926918 https://doi.org/10.1007/s00382-013-1903-9 en eng HAL CCSD Springer Verlag info:eu-repo/semantics/altIdentifier/doi/10.1007/s00382-013-1903-9 info:eu-repo/grantAgreement/EC/FP7/226375/EU/Ice2sea - estimating the future contribution of continental ice to sea-level rise/ICE2SEA hal-00926918 https://hal.univ-grenoble-alpes.fr/hal-00926918 doi:10.1007/s00382-013-1903-9 ISSN: 0930-7575 EISSN: 1432-0894 Climate Dynamics https://hal.univ-grenoble-alpes.fr/hal-00926918 Climate Dynamics, 2013, 41 (11-12), pp.3247-3260. ⟨10.1007/s00382-013-1903-9⟩ Antarctica Surface mass balance climate change modelling [SDE.MCG]Environmental Sciences/Global Changes info:eu-repo/semantics/article Journal articles 2013 ftunivnantes https://doi.org/10.1007/s00382-013-1903-9 2023-02-28T23:52:01Z International audience About 75 % of the Antarctic surface mass gain occurs over areas below 2,000 m asl, which cover 40 % of the grounded ice-sheet. As the topography is complex in many of these regions, surface mass balance modelling is highly dependent on horizontal resolution, and studying the impact of Antarctica on the future rise in sea level requires physical approaches. We have developed a computationally efficient, physical downscaling model for high-resolution (15 km) long-term surface mass balance (SMB) projections. Here, we present results of this model, called SMHiL (surface mass balance high-resolution downscaling), which was forced with the LMDZ4 atmospheric general circulation model to assess Antarctic SMB variability in the twenty first and the twenty second centuries under two different scenarios. The higher resolution of SMHiL better reproduces the geographical patterns of SMB and increase significantly the averaged SMB over the grounded ice-sheet for the end of the twentieth century. A comparison with more than 3200 quality-controlled field data shows that LMDZ4 and SMHiL reproduce the observed values equally well. Nevertheless, field data below 2,000 m asl are too scarce to efficiently show the added value of SMHiL and measuring the SMB in these undocumented areas should be a future scientific priority. Our results suggest that running LMDZ4 at a finer resolution (15 km) may give a future increase in SMB in Antarctica that is about 30 % higher than by using its standard resolution (60 km) due to the higher increase in precipitation in coastal areas at 15 km. However, a part (∼15 %) of these discrepancies could be an artefact from SMHiL since it neglects the foehn effect and likely overestimates the precipitation increase. Future changes in the Antarctic SMB at low elevations will result from the competition between higher snow accumulation and runoff. For this reason, developing downscaling models is crucial to represent processes in sufficient detail and correctly model the SMB in ... Article in Journal/Newspaper Antarc* Antarctic Antarctica Ice Sheet Université de Nantes: HAL-UNIV-NANTES Antarctic The Antarctic Climate Dynamics 41 11-12 3247 3260 |