The 1988–2003 Greenland ice sheet melt extent using passive microwave satellite data and a regional climate model
International audience Measurements from ETH-Camp and JAR1 AWS (West Greenland) as well as coupled atmosphere-snow regional climate simulations have highlighted flaws in the cross-polarized gradient ratio (XPGR) technique used to identify melt from passive microwave satellite data. It was found that...
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ftinsu:oai:HAL:insu-00375466v1 2024-04-28T08:21:08+00:00 The 1988–2003 Greenland ice sheet melt extent using passive microwave satellite data and a regional climate model 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) 2006 https://insu.hal.science/insu-00375466 https://doi.org/10.1007/s00382-006-0150-8 en eng HAL CCSD Springer Verlag info:eu-repo/semantics/altIdentifier/doi/10.1007/s00382-006-0150-8 insu-00375466 https://insu.hal.science/insu-00375466 doi:10.1007/s00382-006-0150-8 ISSN: 0930-7575 EISSN: 1432-0894 Climate Dynamics https://insu.hal.science/insu-00375466 Climate Dynamics, 2006, 27 (5), pp.531 à 541. ⟨10.1007/s00382-006-0150-8⟩ [SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology info:eu-repo/semantics/article Journal articles 2006 ftinsu https://doi.org/10.1007/s00382-006-0150-8 2024-04-05T00:31:43Z International audience Measurements from ETH-Camp and JAR1 AWS (West Greenland) as well as coupled atmosphere-snow regional climate simulations have highlighted flaws in the cross-polarized gradient ratio (XPGR) technique used to identify melt from passive microwave satellite data. It was found that dense clouds (causing notably rainfall) on the ice sheet severely perturb the XPGR melt signal. Therefore, the original XPGR melt detection algorithm has been adapted to better incorporate atmospheric variability over the ice sheet and an updated melt trend for the 1988–2003 period has been calculated. Compared to the original algorithm, the melt zone area increase is eight times higher (from 0.2 to 1.7% year−1). The increase is higher with the improved XPGR technique because rainfall also increased during this period. It is correlated to higher atmospheric temperatures. Finally, the model shows that the total ice sheet runoff is directly proportional to the melt extent surface detected by satellites. These results are important for the understanding of the effect of Greenland melting on the stability of the thermohaline circulation. Article in Journal/Newspaper Greenland Ice Sheet Institut national des sciences de l'Univers: HAL-INSU Climate Dynamics 27 5 531 541 |
institution |
Open Polar |
collection |
Institut national des sciences de l'Univers: HAL-INSU |
op_collection_id |
ftinsu |
language |
English |
topic |
[SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology |
spellingShingle |
[SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology Fettweis, Xavier Gallée, Hubert Lefebre, Filip van Ypersele, Jean-Pascal The 1988–2003 Greenland ice sheet melt extent using passive microwave satellite data and a regional climate model |
topic_facet |
[SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology |
description |
International audience Measurements from ETH-Camp and JAR1 AWS (West Greenland) as well as coupled atmosphere-snow regional climate simulations have highlighted flaws in the cross-polarized gradient ratio (XPGR) technique used to identify melt from passive microwave satellite data. It was found that dense clouds (causing notably rainfall) on the ice sheet severely perturb the XPGR melt signal. Therefore, the original XPGR melt detection algorithm has been adapted to better incorporate atmospheric variability over the ice sheet and an updated melt trend for the 1988–2003 period has been calculated. Compared to the original algorithm, the melt zone area increase is eight times higher (from 0.2 to 1.7% year−1). The increase is higher with the improved XPGR technique because rainfall also increased during this period. It is correlated to higher atmospheric temperatures. Finally, the model shows that the total ice sheet runoff is directly proportional to the melt extent surface detected by satellites. These results are important for the understanding of the effect of Greenland melting on the stability of the thermohaline circulation. |
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 |
The 1988–2003 Greenland ice sheet melt extent using passive microwave satellite data and a regional climate model |
title_short |
The 1988–2003 Greenland ice sheet melt extent using passive microwave satellite data and a regional climate model |
title_full |
The 1988–2003 Greenland ice sheet melt extent using passive microwave satellite data and a regional climate model |
title_fullStr |
The 1988–2003 Greenland ice sheet melt extent using passive microwave satellite data and a regional climate model |
title_full_unstemmed |
The 1988–2003 Greenland ice sheet melt extent using passive microwave satellite data and a regional climate model |
title_sort |
1988–2003 greenland ice sheet melt extent using passive microwave satellite data and a regional climate model |
publisher |
HAL CCSD |
publishDate |
2006 |
url |
https://insu.hal.science/insu-00375466 https://doi.org/10.1007/s00382-006-0150-8 |
genre |
Greenland Ice Sheet |
genre_facet |
Greenland Ice Sheet |
op_source |
ISSN: 0930-7575 EISSN: 1432-0894 Climate Dynamics https://insu.hal.science/insu-00375466 Climate Dynamics, 2006, 27 (5), pp.531 à 541. ⟨10.1007/s00382-006-0150-8⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1007/s00382-006-0150-8 insu-00375466 https://insu.hal.science/insu-00375466 doi:10.1007/s00382-006-0150-8 |
op_doi |
https://doi.org/10.1007/s00382-006-0150-8 |
container_title |
Climate Dynamics |
container_volume |
27 |
container_issue |
5 |
container_start_page |
531 |
op_container_end_page |
541 |
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1797583644419686400 |