Multi-decadal evolution of ice/snow covers in the Mont-Blanc massif (Haute-Savoie, France).
National audience Dynamics and evolution of the major glaciers of the Mont-Blanc massif have been vastly studied since the XXth century. Ice/snow covers on steep rock faces as part of the cryosphere however remain poorly studied with only qualitative descriptions existing. The study of ice/snow cove...
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ftccsdartic:oai:HAL:hal-01784140v1 2023-05-15T16:37:22+02:00 Multi-decadal evolution of ice/snow covers in the Mont-Blanc massif (Haute-Savoie, France). Guillet, Grégoire Ravanel, Ludovic Environnements, Dynamiques et Territoires de la Montagne (EDYTEM) Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS) Société Hydrotechnique de France Grenoble, France 2017-03-22 https://hal-sde.archives-ouvertes.fr/hal-01784140 en eng HAL CCSD hal-01784140 https://hal-sde.archives-ouvertes.fr/hal-01784140 Journées de la Section Glaciologie-nivologie de la Société Hydrotechnique de France https://hal-sde.archives-ouvertes.fr/hal-01784140 Journées de la Section Glaciologie-nivologie de la Société Hydrotechnique de France, Société Hydrotechnique de France, Mar 2017, Grenoble, France [SDE]Environmental Sciences info:eu-repo/semantics/conferenceObject Conference papers 2017 ftccsdartic 2021-12-26T00:01:34Z National audience Dynamics and evolution of the major glaciers of the Mont-Blanc massif have been vastly studied since the XXth century. Ice/snow covers on steep rock faces as part of the cryosphere however remain poorly studied with only qualitative descriptions existing. The study of ice/snow covers is primordial to further understand permafrost degradation throughout the Mont-Blanc massif and to improve safety and prevention for mountain sports practitioners. This study focuses on quantifying the evolution of ice/snow covers surface during the past century using a specially developed monoplotting tool using Bayesian statistics and Markov Chain Monte Carlo algorithms. Combining digital elevation models and photographs covering a time-span of 110 years, we calculated the ice/snow cover surface for 3 study sites-North faces of the Tour Ronde (3792 m a.s.l.) and the Grandes Jorasses (4208 m a.s.l.) and Triangle du Tacul (3970 m a.s.l.)-and deduced the evolution of their area throughout the XXth century. First results are showing several increase/decrease periods. The first decrease in ice/snow cover surface occurs between the 1940's and the 1950's. It is followed by an increase up to the 1980's. Since then, ice/snow covers show a general decrease in surface which is faster since the 2010's. Furthermore, the gain/loss during the increase/decrease periods varies with the considered ice/snow cover, making it an interesting cryospheric entity of its own. Conference Object Ice permafrost Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Mont Blanc ENVELOPE(69.468,69.468,-49.461,-49.461) Ronde ENVELOPE(141.258,141.258,-66.793,-66.793) |
institution |
Open Polar |
collection |
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
op_collection_id |
ftccsdartic |
language |
English |
topic |
[SDE]Environmental Sciences |
spellingShingle |
[SDE]Environmental Sciences Guillet, Grégoire Ravanel, Ludovic Multi-decadal evolution of ice/snow covers in the Mont-Blanc massif (Haute-Savoie, France). |
topic_facet |
[SDE]Environmental Sciences |
description |
National audience Dynamics and evolution of the major glaciers of the Mont-Blanc massif have been vastly studied since the XXth century. Ice/snow covers on steep rock faces as part of the cryosphere however remain poorly studied with only qualitative descriptions existing. The study of ice/snow covers is primordial to further understand permafrost degradation throughout the Mont-Blanc massif and to improve safety and prevention for mountain sports practitioners. This study focuses on quantifying the evolution of ice/snow covers surface during the past century using a specially developed monoplotting tool using Bayesian statistics and Markov Chain Monte Carlo algorithms. Combining digital elevation models and photographs covering a time-span of 110 years, we calculated the ice/snow cover surface for 3 study sites-North faces of the Tour Ronde (3792 m a.s.l.) and the Grandes Jorasses (4208 m a.s.l.) and Triangle du Tacul (3970 m a.s.l.)-and deduced the evolution of their area throughout the XXth century. First results are showing several increase/decrease periods. The first decrease in ice/snow cover surface occurs between the 1940's and the 1950's. It is followed by an increase up to the 1980's. Since then, ice/snow covers show a general decrease in surface which is faster since the 2010's. Furthermore, the gain/loss during the increase/decrease periods varies with the considered ice/snow cover, making it an interesting cryospheric entity of its own. |
author2 |
Environnements, Dynamiques et Territoires de la Montagne (EDYTEM) Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS) Société Hydrotechnique de France |
format |
Conference Object |
author |
Guillet, Grégoire Ravanel, Ludovic |
author_facet |
Guillet, Grégoire Ravanel, Ludovic |
author_sort |
Guillet, Grégoire |
title |
Multi-decadal evolution of ice/snow covers in the Mont-Blanc massif (Haute-Savoie, France). |
title_short |
Multi-decadal evolution of ice/snow covers in the Mont-Blanc massif (Haute-Savoie, France). |
title_full |
Multi-decadal evolution of ice/snow covers in the Mont-Blanc massif (Haute-Savoie, France). |
title_fullStr |
Multi-decadal evolution of ice/snow covers in the Mont-Blanc massif (Haute-Savoie, France). |
title_full_unstemmed |
Multi-decadal evolution of ice/snow covers in the Mont-Blanc massif (Haute-Savoie, France). |
title_sort |
multi-decadal evolution of ice/snow covers in the mont-blanc massif (haute-savoie, france). |
publisher |
HAL CCSD |
publishDate |
2017 |
url |
https://hal-sde.archives-ouvertes.fr/hal-01784140 |
op_coverage |
Grenoble, France |
long_lat |
ENVELOPE(69.468,69.468,-49.461,-49.461) ENVELOPE(141.258,141.258,-66.793,-66.793) |
geographic |
Mont Blanc Ronde |
geographic_facet |
Mont Blanc Ronde |
genre |
Ice permafrost |
genre_facet |
Ice permafrost |
op_source |
Journées de la Section Glaciologie-nivologie de la Société Hydrotechnique de France https://hal-sde.archives-ouvertes.fr/hal-01784140 Journées de la Section Glaciologie-nivologie de la Société Hydrotechnique de France, Société Hydrotechnique de France, Mar 2017, Grenoble, France |
op_relation |
hal-01784140 https://hal-sde.archives-ouvertes.fr/hal-01784140 |
_version_ |
1766027659960123392 |