Effects of topographic and meteorological parameters on the surface area loss of ice aprons in the Mont Blanc massif (European Alps)
International audience Ice aprons (IAs) are part of the critical components of the Alpine cryosphere. As a result of the changing climate over the past few decades, deglaciation has resulted in a surface decrease of IAs, which has not yet been documented, except for a few specific examples. In this...
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Online Access: | https://hal.science/hal-04024652 https://hal.science/hal-04024652/document https://hal.science/hal-04024652/file/2022_Kaushik_TC.pdf https://doi.org/10.5194/tc-16-4251-2022 |
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ftinsu:oai:HAL:hal-04024652v1 2023-07-30T04:07:14+02:00 Effects of topographic and meteorological parameters on the surface area loss of ice aprons in the Mont Blanc massif (European Alps) Kaushik, Suvrat Ravanel, Ludovic Magnin, Florence Yan, Yajing Trouve, Emmanuel Cusicanqui, Diego Environnements, Dynamiques et Territoires de Montagne (EDYTEM) Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS) Laboratoire d'Informatique, Systèmes, Traitement de l'Information et de la Connaissance (LISTIC) Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry ) Institut des Géosciences de l’Environnement (IGE) Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ) Université Grenoble Alpes (UGA) 2022 https://hal.science/hal-04024652 https://hal.science/hal-04024652/document https://hal.science/hal-04024652/file/2022_Kaushik_TC.pdf https://doi.org/10.5194/tc-16-4251-2022 en eng HAL CCSD Copernicus info:eu-repo/semantics/altIdentifier/doi/10.5194/tc-16-4251-2022 hal-04024652 https://hal.science/hal-04024652 https://hal.science/hal-04024652/document https://hal.science/hal-04024652/file/2022_Kaushik_TC.pdf doi:10.5194/tc-16-4251-2022 info:eu-repo/semantics/OpenAccess ISSN: 1994-0424 EISSN: 1994-0416 The Cryosphere https://hal.science/hal-04024652 The Cryosphere, 2022, 16 (10), pp.4251 - 4271. ⟨10.5194/tc-16-4251-2022⟩ [SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology info:eu-repo/semantics/article Journal articles 2022 ftinsu https://doi.org/10.5194/tc-16-4251-2022 2023-07-12T16:23:08Z International audience Ice aprons (IAs) are part of the critical components of the Alpine cryosphere. As a result of the changing climate over the past few decades, deglaciation has resulted in a surface decrease of IAs, which has not yet been documented, except for a few specific examples. In this study, we quantify the effects of climate change on IAs since the mid-20th century in the Mont Blanc massif (western European Alps). We then evaluate the role of meteorological parameters and the local topography in the behaviour of IAs. We precisely mapped the surface areas of 200 IAs using highresolution aerial and satellite photographs from 1952, 2001, 2012 and 2019. From the latter inventory, the surface area of the present individual IAs ranges from 0.001 to 0.04 km 2. IAs have lost their surface area over the past 70 years, with an alarming increase since the early 2000s. The total area, from 7.93 km 2 in 1952, was reduced to 5.91 km 2 in 2001 (−25.5 %) before collapsing to 4.21 km 2 in 2019 (−47 % since 1952). We performed a regression analysis using temperature and precipitation proxies to better understand the effects of meteorological parameters on IA surface area variations. We found a strong correlation between both proxies and the relative area loss of IAs, indicating the significant influence of the changing climate on the evolution of IAs. We also evaluated the role of the local topographic factors in the IA area loss. At a regional scale, factors like direct solar radiation and elevation influence the behaviour of IAs, while others like curvature, slope and size of the IAs seem to be rather important on a local scale. Article in Journal/Newspaper The Cryosphere Institut national des sciences de l'Univers: HAL-INSU Mont Blanc ENVELOPE(69.468,69.468,-49.461,-49.461) The Cryosphere 16 10 4251 4271 |
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 Kaushik, Suvrat Ravanel, Ludovic Magnin, Florence Yan, Yajing Trouve, Emmanuel Cusicanqui, Diego Effects of topographic and meteorological parameters on the surface area loss of ice aprons in the Mont Blanc massif (European Alps) |
topic_facet |
[SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology |
description |
International audience Ice aprons (IAs) are part of the critical components of the Alpine cryosphere. As a result of the changing climate over the past few decades, deglaciation has resulted in a surface decrease of IAs, which has not yet been documented, except for a few specific examples. In this study, we quantify the effects of climate change on IAs since the mid-20th century in the Mont Blanc massif (western European Alps). We then evaluate the role of meteorological parameters and the local topography in the behaviour of IAs. We precisely mapped the surface areas of 200 IAs using highresolution aerial and satellite photographs from 1952, 2001, 2012 and 2019. From the latter inventory, the surface area of the present individual IAs ranges from 0.001 to 0.04 km 2. IAs have lost their surface area over the past 70 years, with an alarming increase since the early 2000s. The total area, from 7.93 km 2 in 1952, was reduced to 5.91 km 2 in 2001 (−25.5 %) before collapsing to 4.21 km 2 in 2019 (−47 % since 1952). We performed a regression analysis using temperature and precipitation proxies to better understand the effects of meteorological parameters on IA surface area variations. We found a strong correlation between both proxies and the relative area loss of IAs, indicating the significant influence of the changing climate on the evolution of IAs. We also evaluated the role of the local topographic factors in the IA area loss. At a regional scale, factors like direct solar radiation and elevation influence the behaviour of IAs, while others like curvature, slope and size of the IAs seem to be rather important on a local scale. |
author2 |
Environnements, Dynamiques et Territoires de Montagne (EDYTEM) Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS) Laboratoire d'Informatique, Systèmes, Traitement de l'Information et de la Connaissance (LISTIC) Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry ) Institut des Géosciences de l’Environnement (IGE) Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ) Université Grenoble Alpes (UGA) |
format |
Article in Journal/Newspaper |
author |
Kaushik, Suvrat Ravanel, Ludovic Magnin, Florence Yan, Yajing Trouve, Emmanuel Cusicanqui, Diego |
author_facet |
Kaushik, Suvrat Ravanel, Ludovic Magnin, Florence Yan, Yajing Trouve, Emmanuel Cusicanqui, Diego |
author_sort |
Kaushik, Suvrat |
title |
Effects of topographic and meteorological parameters on the surface area loss of ice aprons in the Mont Blanc massif (European Alps) |
title_short |
Effects of topographic and meteorological parameters on the surface area loss of ice aprons in the Mont Blanc massif (European Alps) |
title_full |
Effects of topographic and meteorological parameters on the surface area loss of ice aprons in the Mont Blanc massif (European Alps) |
title_fullStr |
Effects of topographic and meteorological parameters on the surface area loss of ice aprons in the Mont Blanc massif (European Alps) |
title_full_unstemmed |
Effects of topographic and meteorological parameters on the surface area loss of ice aprons in the Mont Blanc massif (European Alps) |
title_sort |
effects of topographic and meteorological parameters on the surface area loss of ice aprons in the mont blanc massif (european alps) |
publisher |
HAL CCSD |
publishDate |
2022 |
url |
https://hal.science/hal-04024652 https://hal.science/hal-04024652/document https://hal.science/hal-04024652/file/2022_Kaushik_TC.pdf https://doi.org/10.5194/tc-16-4251-2022 |
long_lat |
ENVELOPE(69.468,69.468,-49.461,-49.461) |
geographic |
Mont Blanc |
geographic_facet |
Mont Blanc |
genre |
The Cryosphere |
genre_facet |
The Cryosphere |
op_source |
ISSN: 1994-0424 EISSN: 1994-0416 The Cryosphere https://hal.science/hal-04024652 The Cryosphere, 2022, 16 (10), pp.4251 - 4271. ⟨10.5194/tc-16-4251-2022⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.5194/tc-16-4251-2022 hal-04024652 https://hal.science/hal-04024652 https://hal.science/hal-04024652/document https://hal.science/hal-04024652/file/2022_Kaushik_TC.pdf doi:10.5194/tc-16-4251-2022 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.5194/tc-16-4251-2022 |
container_title |
The Cryosphere |
container_volume |
16 |
container_issue |
10 |
container_start_page |
4251 |
op_container_end_page |
4271 |
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1772820448814301184 |