The 1979–2005 Greenland ice sheet melt extent from passive microwave data using an improved version of the melt retrieval XPGR algorithm
International audience Analysis of passive microwave satellite observations over the Greenland ice sheet reveals a significant increase in surface melt over the period 1979–2005. Since 1979, the total melt area was found to have increased by +1.22 × 107 km2. An improved version of the cross-polarize...
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Online Access: | https://insu.hal.science/insu-00376275 https://insu.hal.science/insu-00376275/document https://insu.hal.science/insu-00376275/file/2006GL028787.pdf https://doi.org/10.1029/2006GL028787 |
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ftunivsavoie:oai:HAL:insu-00376275v1 2024-04-28T08:20:36+00:00 The 1979–2005 Greenland ice sheet melt extent from passive microwave data using an improved version of the melt retrieval XPGR algorithm Fettweis, Xavier van Ypersele, Jean-Pascal Gallée, Hubert Lefebre, Filip Lefebvre, W. 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) 2007 https://insu.hal.science/insu-00376275 https://insu.hal.science/insu-00376275/document https://insu.hal.science/insu-00376275/file/2006GL028787.pdf https://doi.org/10.1029/2006GL028787 en eng HAL CCSD American Geophysical Union info:eu-repo/semantics/altIdentifier/doi/10.1029/2006GL028787 insu-00376275 https://insu.hal.science/insu-00376275 https://insu.hal.science/insu-00376275/document https://insu.hal.science/insu-00376275/file/2006GL028787.pdf doi:10.1029/2006GL028787 info:eu-repo/semantics/OpenAccess ISSN: 0094-8276 EISSN: 1944-8007 Geophysical Research Letters https://insu.hal.science/insu-00376275 Geophysical Research Letters, 2007, 34 (L05502), 1 à 5 p. ⟨10.1029/2006GL028787⟩ Greenland surface melt microwave data [SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology info:eu-repo/semantics/article Journal articles 2007 ftunivsavoie https://doi.org/10.1029/2006GL028787 2024-04-11T00:42:33Z International audience Analysis of passive microwave satellite observations over the Greenland ice sheet reveals a significant increase in surface melt over the period 1979–2005. Since 1979, the total melt area was found to have increased by +1.22 × 107 km2. An improved version of the cross-polarized gradient ratio (XPGR) technique is used to identify the melt from the brightness temperatures. The improvements in the melt retrieval XPGR algorithm as well as the surface melt acceleration are discussed with results from a coupled atmosphere-snow regional climate model. From 1979 to 2005, the ablation period has been increasing everywhere over the melt zone except in the regions where the model simulates an increased summer snowfall. Indeed, more snowfall in summer decreases the liquid water content of the snowpack, raises the albedo and therefore reduces the melt. Finally, the observed melt acceleration over the Greenland ice sheet is highly correlated with both Greenland and global warming suggesting a continuing surface melt increase in the future. Article in Journal/Newspaper Greenland Ice Sheet Université Savoie Mont Blanc: HAL Geophysical Research Letters 34 5 |
institution |
Open Polar |
collection |
Université Savoie Mont Blanc: HAL |
op_collection_id |
ftunivsavoie |
language |
English |
topic |
Greenland surface melt microwave data [SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology |
spellingShingle |
Greenland surface melt microwave data [SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology Fettweis, Xavier van Ypersele, Jean-Pascal Gallée, Hubert Lefebre, Filip Lefebvre, W. The 1979–2005 Greenland ice sheet melt extent from passive microwave data using an improved version of the melt retrieval XPGR algorithm |
topic_facet |
Greenland surface melt microwave data [SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology |
description |
International audience Analysis of passive microwave satellite observations over the Greenland ice sheet reveals a significant increase in surface melt over the period 1979–2005. Since 1979, the total melt area was found to have increased by +1.22 × 107 km2. An improved version of the cross-polarized gradient ratio (XPGR) technique is used to identify the melt from the brightness temperatures. The improvements in the melt retrieval XPGR algorithm as well as the surface melt acceleration are discussed with results from a coupled atmosphere-snow regional climate model. From 1979 to 2005, the ablation period has been increasing everywhere over the melt zone except in the regions where the model simulates an increased summer snowfall. Indeed, more snowfall in summer decreases the liquid water content of the snowpack, raises the albedo and therefore reduces the melt. Finally, the observed melt acceleration over the Greenland ice sheet is highly correlated with both Greenland and global warming suggesting a continuing surface melt increase in the future. |
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 van Ypersele, Jean-Pascal Gallée, Hubert Lefebre, Filip Lefebvre, W. |
author_facet |
Fettweis, Xavier van Ypersele, Jean-Pascal Gallée, Hubert Lefebre, Filip Lefebvre, W. |
author_sort |
Fettweis, Xavier |
title |
The 1979–2005 Greenland ice sheet melt extent from passive microwave data using an improved version of the melt retrieval XPGR algorithm |
title_short |
The 1979–2005 Greenland ice sheet melt extent from passive microwave data using an improved version of the melt retrieval XPGR algorithm |
title_full |
The 1979–2005 Greenland ice sheet melt extent from passive microwave data using an improved version of the melt retrieval XPGR algorithm |
title_fullStr |
The 1979–2005 Greenland ice sheet melt extent from passive microwave data using an improved version of the melt retrieval XPGR algorithm |
title_full_unstemmed |
The 1979–2005 Greenland ice sheet melt extent from passive microwave data using an improved version of the melt retrieval XPGR algorithm |
title_sort |
1979–2005 greenland ice sheet melt extent from passive microwave data using an improved version of the melt retrieval xpgr algorithm |
publisher |
HAL CCSD |
publishDate |
2007 |
url |
https://insu.hal.science/insu-00376275 https://insu.hal.science/insu-00376275/document https://insu.hal.science/insu-00376275/file/2006GL028787.pdf https://doi.org/10.1029/2006GL028787 |
genre |
Greenland Ice Sheet |
genre_facet |
Greenland Ice Sheet |
op_source |
ISSN: 0094-8276 EISSN: 1944-8007 Geophysical Research Letters https://insu.hal.science/insu-00376275 Geophysical Research Letters, 2007, 34 (L05502), 1 à 5 p. ⟨10.1029/2006GL028787⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1029/2006GL028787 insu-00376275 https://insu.hal.science/insu-00376275 https://insu.hal.science/insu-00376275/document https://insu.hal.science/insu-00376275/file/2006GL028787.pdf doi:10.1029/2006GL028787 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1029/2006GL028787 |
container_title |
Geophysical Research Letters |
container_volume |
34 |
container_issue |
5 |
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1797583428752769024 |