Recent evolution of an ice-cored moraine at the Gentianes Pass, Valais Alps, Switzerland
International audience Lateral moraines located in permafrost environments often preserve large amounts of both glacier and periglacial ice. To understand how ice‐cored moraines located in high alpine environments evolve in a context of both glacier retreat and permafrost degradation, we performed 1...
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fttriple:oai:gotriple.eu:10670/1.t4d1e9 2023-05-15T16:36:44+02:00 Recent evolution of an ice-cored moraine at the Gentianes Pass, Valais Alps, Switzerland Ravanel, Ludovic Duvillard, Pierre-Allain Jaboyedoff, Michel Lambiel, Christophe 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 ) Université de Lausanne (UNIL) Institut de Géographie - Lausanne (IGUL) 2018-01-01 https://doi.org/10.1002/ldr.3088 https://hal-sde.archives-ouvertes.fr/hal-01881660 en eng HAL CCSD Wiley hal-01881660 doi:10.1002/ldr.3088 10670/1.t4d1e9 https://hal-sde.archives-ouvertes.fr/hal-01881660 undefined Hyper Article en Ligne - Sciences de l'Homme et de la Société ISSN: 1085-3278 EISSN: 1099-145X Land Degradation and Development Land Degradation and Development, Wiley, 2018, ⟨10.1002/ldr.3088⟩ geo envir Journal Article https://vocabularies.coar-repositories.org/resource_types/c_6501/ 2018 fttriple https://doi.org/10.1002/ldr.3088 2023-01-22T18:12:46Z International audience Lateral moraines located in permafrost environments often preserve large amounts of both glacier and periglacial ice. To understand how ice‐cored moraines located in high alpine environments evolve in a context of both glacier retreat and permafrost degradation, we performed 11 terrestrial laser‐scanning measurement campaigns between 2007 and 2014 on a highly anthropogenic overprinted moraine prone to instability. Resulting comparison of the subsequent 3D models allowed to qualitatively and quantitatively analyze the morphological evolution of the moraine. The comparisons indicate a very high geomorphic activity of the moraine including large areas affected by downslope movements of blocks and 10 landslides with a volume between 24 ± 1 and 1,138 ± 47 m3. Data also indicated a very strong ice melt with a loss of ice thickness locally reaching 17.7 m at the foot of the moraine. These results, compared with resistivity and thermal measurements of the ground, suggest the combined role of ice loss at the foot of the moraine and the permafrost activity/warming in triggering these processes. Article in Journal/Newspaper Ice permafrost Unknown Land Degradation & Development 29 10 3693 3708 |
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geo envir |
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geo envir Ravanel, Ludovic Duvillard, Pierre-Allain Jaboyedoff, Michel Lambiel, Christophe Recent evolution of an ice-cored moraine at the Gentianes Pass, Valais Alps, Switzerland |
topic_facet |
geo envir |
description |
International audience Lateral moraines located in permafrost environments often preserve large amounts of both glacier and periglacial ice. To understand how ice‐cored moraines located in high alpine environments evolve in a context of both glacier retreat and permafrost degradation, we performed 11 terrestrial laser‐scanning measurement campaigns between 2007 and 2014 on a highly anthropogenic overprinted moraine prone to instability. Resulting comparison of the subsequent 3D models allowed to qualitatively and quantitatively analyze the morphological evolution of the moraine. The comparisons indicate a very high geomorphic activity of the moraine including large areas affected by downslope movements of blocks and 10 landslides with a volume between 24 ± 1 and 1,138 ± 47 m3. Data also indicated a very strong ice melt with a loss of ice thickness locally reaching 17.7 m at the foot of the moraine. These results, compared with resistivity and thermal measurements of the ground, suggest the combined role of ice loss at the foot of the moraine and the permafrost activity/warming in triggering these processes. |
author2 |
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 ) Université de Lausanne (UNIL) Institut de Géographie - Lausanne (IGUL) |
format |
Article in Journal/Newspaper |
author |
Ravanel, Ludovic Duvillard, Pierre-Allain Jaboyedoff, Michel Lambiel, Christophe |
author_facet |
Ravanel, Ludovic Duvillard, Pierre-Allain Jaboyedoff, Michel Lambiel, Christophe |
author_sort |
Ravanel, Ludovic |
title |
Recent evolution of an ice-cored moraine at the Gentianes Pass, Valais Alps, Switzerland |
title_short |
Recent evolution of an ice-cored moraine at the Gentianes Pass, Valais Alps, Switzerland |
title_full |
Recent evolution of an ice-cored moraine at the Gentianes Pass, Valais Alps, Switzerland |
title_fullStr |
Recent evolution of an ice-cored moraine at the Gentianes Pass, Valais Alps, Switzerland |
title_full_unstemmed |
Recent evolution of an ice-cored moraine at the Gentianes Pass, Valais Alps, Switzerland |
title_sort |
recent evolution of an ice-cored moraine at the gentianes pass, valais alps, switzerland |
publisher |
HAL CCSD |
publishDate |
2018 |
url |
https://doi.org/10.1002/ldr.3088 https://hal-sde.archives-ouvertes.fr/hal-01881660 |
genre |
Ice permafrost |
genre_facet |
Ice permafrost |
op_source |
Hyper Article en Ligne - Sciences de l'Homme et de la Société ISSN: 1085-3278 EISSN: 1099-145X Land Degradation and Development Land Degradation and Development, Wiley, 2018, ⟨10.1002/ldr.3088⟩ |
op_relation |
hal-01881660 doi:10.1002/ldr.3088 10670/1.t4d1e9 https://hal-sde.archives-ouvertes.fr/hal-01881660 |
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https://doi.org/10.1002/ldr.3088 |
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Land Degradation & Development |
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29 |
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10 |
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3693 |
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3708 |
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