Greenland surface mass balance simulated by a regional climate model and comparison with satellite-derived data in 1990-1991
International audience The 1990 and 1991 ablation seasons over Greenland are simulated with a coupled atmosphere-snow regional climate model with a 25-km horizontal resolution. The simulated snow water content allows a direct comparison with the satellite-derived melt signal. The model is forced wit...
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ftunivnantes:oai:HAL:insu-00374263v1 2023-05-15T16:27:35+02:00 Greenland surface mass balance simulated by a regional climate model and comparison with satellite-derived data in 1990-1991 Fettweis, Xavier Gallée, Hubert Lefebre, Filip van Ypersele, Jean-Pascal Institut d'Astronomie et de Géophysique Georges Lemaître (UCL-ASTR) Université Catholique de Louvain = Catholic University of Louvain (UCL) 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) Flemish Institute for Technological Research (VITO) 2005 https://hal-insu.archives-ouvertes.fr/insu-00374263 https://doi.org/10.1007/s00382-005-0010-y en eng HAL CCSD Springer Verlag info:eu-repo/semantics/altIdentifier/doi/10.1007/s00382-005-0010-y insu-00374263 https://hal-insu.archives-ouvertes.fr/insu-00374263 doi:10.1007/s00382-005-0010-y ISSN: 0930-7575 EISSN: 1432-0894 Climate Dynamics https://hal-insu.archives-ouvertes.fr/insu-00374263 Climate Dynamics, 2005, 24 (6), pp.623 à 640. ⟨10.1007/s00382-005-0010-y⟩ [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology info:eu-repo/semantics/article Journal articles 2005 ftunivnantes https://doi.org/10.1007/s00382-005-0010-y 2023-03-01T01:32:28Z International audience The 1990 and 1991 ablation seasons over Greenland are simulated with a coupled atmosphere-snow regional climate model with a 25-km horizontal resolution. The simulated snow water content allows a direct comparison with the satellite-derived melt signal. The model is forced with 6-hourly ERA-40 reanalysis at its boundaries. An evaluation of the simulated precipitation and a comparison of the modelled melt zone and the surface albedo with remote sensing observations are presented. Both the distribution and quantity of the simulated precipitation agree with observations from coastal weather stations, estimates from other models and the ERA-40 reanalysis. There are overestimations along the steep eastern coast, which are most likely due to the “topographic barrier effect”. The simulated extent and time evolution of the wet snow zone compare generally well with satellite-derived data, except during rainfall events on the ice sheet and because of a bias in the passive microwave retrieved melt signal. Although satellite-based surface albedo retrieval is only valid in the case of clear sky, the interpolation and the correction of these data enable us to validate the simulated albedo on the scale of the whole Greenland. These two comparisons highlight a large sensitivity of the remote sensing observations to weather conditions. Our high-resolution climate model was used to improve the retrieval algorithms by taking more fully into account the atmosphere variability. Finally, the good agreement of the simulated melting surface with the improved satellite signal allows a detailed estimation of the melting volume from the simulation. Article in Journal/Newspaper Greenland Ice Sheet Université de Nantes: HAL-UNIV-NANTES Greenland Climate Dynamics 24 6 623 640 |
institution |
Open Polar |
collection |
Université de Nantes: HAL-UNIV-NANTES |
op_collection_id |
ftunivnantes |
language |
English |
topic |
[SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology |
spellingShingle |
[SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology Fettweis, Xavier Gallée, Hubert Lefebre, Filip van Ypersele, Jean-Pascal Greenland surface mass balance simulated by a regional climate model and comparison with satellite-derived data in 1990-1991 |
topic_facet |
[SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology |
description |
International audience The 1990 and 1991 ablation seasons over Greenland are simulated with a coupled atmosphere-snow regional climate model with a 25-km horizontal resolution. The simulated snow water content allows a direct comparison with the satellite-derived melt signal. The model is forced with 6-hourly ERA-40 reanalysis at its boundaries. An evaluation of the simulated precipitation and a comparison of the modelled melt zone and the surface albedo with remote sensing observations are presented. Both the distribution and quantity of the simulated precipitation agree with observations from coastal weather stations, estimates from other models and the ERA-40 reanalysis. There are overestimations along the steep eastern coast, which are most likely due to the “topographic barrier effect”. The simulated extent and time evolution of the wet snow zone compare generally well with satellite-derived data, except during rainfall events on the ice sheet and because of a bias in the passive microwave retrieved melt signal. Although satellite-based surface albedo retrieval is only valid in the case of clear sky, the interpolation and the correction of these data enable us to validate the simulated albedo on the scale of the whole Greenland. These two comparisons highlight a large sensitivity of the remote sensing observations to weather conditions. Our high-resolution climate model was used to improve the retrieval algorithms by taking more fully into account the atmosphere variability. Finally, the good agreement of the simulated melting surface with the improved satellite signal allows a detailed estimation of the melting volume from the simulation. |
author2 |
Institut d'Astronomie et de Géophysique Georges Lemaître (UCL-ASTR) Université Catholique de Louvain = Catholic University of Louvain (UCL) 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) Flemish Institute for Technological Research (VITO) |
format |
Article in Journal/Newspaper |
author |
Fettweis, Xavier Gallée, Hubert Lefebre, Filip van Ypersele, Jean-Pascal |
author_facet |
Fettweis, Xavier Gallée, Hubert Lefebre, Filip van Ypersele, Jean-Pascal |
author_sort |
Fettweis, Xavier |
title |
Greenland surface mass balance simulated by a regional climate model and comparison with satellite-derived data in 1990-1991 |
title_short |
Greenland surface mass balance simulated by a regional climate model and comparison with satellite-derived data in 1990-1991 |
title_full |
Greenland surface mass balance simulated by a regional climate model and comparison with satellite-derived data in 1990-1991 |
title_fullStr |
Greenland surface mass balance simulated by a regional climate model and comparison with satellite-derived data in 1990-1991 |
title_full_unstemmed |
Greenland surface mass balance simulated by a regional climate model and comparison with satellite-derived data in 1990-1991 |
title_sort |
greenland surface mass balance simulated by a regional climate model and comparison with satellite-derived data in 1990-1991 |
publisher |
HAL CCSD |
publishDate |
2005 |
url |
https://hal-insu.archives-ouvertes.fr/insu-00374263 https://doi.org/10.1007/s00382-005-0010-y |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland Ice Sheet |
genre_facet |
Greenland Ice Sheet |
op_source |
ISSN: 0930-7575 EISSN: 1432-0894 Climate Dynamics https://hal-insu.archives-ouvertes.fr/insu-00374263 Climate Dynamics, 2005, 24 (6), pp.623 à 640. ⟨10.1007/s00382-005-0010-y⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1007/s00382-005-0010-y insu-00374263 https://hal-insu.archives-ouvertes.fr/insu-00374263 doi:10.1007/s00382-005-0010-y |
op_doi |
https://doi.org/10.1007/s00382-005-0010-y |
container_title |
Climate Dynamics |
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24 |
container_issue |
6 |
container_start_page |
623 |
op_container_end_page |
640 |
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1766016985733267456 |