دورية أكاديمية
Distribution and evolution of ice aprons in a changing climate in the Mont Blanc massif (Western European Alps) ; Distribution et évolution des couvertures glacio-nivales en contexte de changement climatique dans le massif du Mont Blanc (Alpes européennes occidentales)
| العنوان: | Distribution and evolution of ice aprons in a changing climate in the Mont Blanc massif (Western European Alps) ; Distribution et évolution des couvertures glacio-nivales en contexte de changement climatique dans le massif du Mont Blanc (Alpes européennes occidentales) |
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| المؤلفون: | Kaushik, Suvrat, Ravanel, Ludovic, Magnin, Florence, Yan, Yajing, Trouve, Emmanuel, Cusicanqui, Diego |
| المساهمون: | Environnements, Dynamiques et Territoires de la Montagne (EDYTEM), Centre National de la Recherche Scientifique (CNRS)-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry ), 2020-2026, Edytem Equipe Morphodynamiques, Centre National de la Recherche Scientifique (CNRS)-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS)-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry ), Laboratoire d'Informatique, Systèmes, Traitement de l'Information et de la Connaissance (LISTIC), Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry ) |
| المصدر: | ISSN: 1682-1750. |
| بيانات النشر: | HAL CCSD Copernicus GmbH (Copernicus Publications) |
| سنة النشر: | 2021 |
| المجموعة: | Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
| مصطلحات موضوعية: | Ice Aprons, Digital Elevation Model, topographic factors, climate change, Mont-Blanc massif, [SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology, [SDE.MCG]Environmental Sciences/Global Changes, [SDU.STU.GM]Sciences of the Universe [physics]/Earth Sciences/Geomorphology, [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces, environment |
| الوصف: | International audience ; Ice Apron (IA) is a poorly studied ice feature, commonly existing in all the world's major mountain regions. This study aims to map the locations of the IAs in the Mont Blanc massif (MBM), making use of the very high-resolution optical satellite images from 2001, 2012 and 2019. 423 IAs were identified and accurately delineated in the MBM on the images from 2019, and their topographic characteristics were studied. We generated our own Digital Elevation Model (DEM) at 4 m resolution since the freely available products predominantly suffer from significant inconsistencies, especially in steep mountain areas. Results show that most IAs exist at elevations above the regional Equilibrium Line Altitude (ELA), on steep slopes, on concave surfaces, on northern and southern aspects and on the most rugged terrains. They are also commonly associated with steep slope glaciers as 85% of them occur on these glaciers' headwalls. A comparison between 2001 and 2019 shows that IAs have lost around 29% of their area over a period of 18 years. This is significant and the rate of area loss is very alarming in comparison with the larger glacier bodies. We also studied the effect of topographic parameters on the area loss. We found that topographic factors like slope, aspect, curvature, elevation and Terrain Ruggedness Index (TRI) strongly influence the rate of area loss of IAs. |
| نوع الوثيقة: | article in journal/newspaper |
| اللغة: | English |
| العلاقة: | hal-03449050; https://hal.archives-ouvertes.fr/hal-03449050Test; https://hal.archives-ouvertes.fr/hal-03449050/documentTest; https://hal.archives-ouvertes.fr/hal-03449050/file/Kaushik-et-al_2021_ISPRS-archives.pdfTest |
| DOI: | 10.5194/isprs-archives-xliii-b3-2021-469-2021 |
| الإتاحة: | https://doi.org/10.5194/isprs-archives-xliii-b3-2021-469-2021Test https://hal.archives-ouvertes.fr/hal-03449050Test https://hal.archives-ouvertes.fr/hal-03449050/documentTest https://hal.archives-ouvertes.fr/hal-03449050/file/Kaushik-et-al_2021_ISPRS-archives.pdfTest |
| حقوق: | info:eu-repo/semantics/OpenAccess |
| رقم الانضمام: | edsbas.7475B407 |
| قاعدة البيانات: | BASE |
| DOI: | 10.5194/isprs-archives-xliii-b3-2021-469-2021 |
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