Rock falls in high-alpine rock walls quantified by terrestrial lidar measurements : A case study in the Mont Blanc area
International audience The global warming observed in recent decades and its future increase may affect permafrost distribution on high-mountain faces with consequences for their stability. In this paper, we show that rock falls from high-alpine rock walls can be computed with a decimetre-resolution...
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Online Access: | https://hal.science/halsde-00292415 https://doi.org/10.1029/2008GL033424 |
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ftunivsavoie:oai:HAL:halsde-00292415v1 2024-04-28T08:35:48+00:00 Rock falls in high-alpine rock walls quantified by terrestrial lidar measurements : A case study in the Mont Blanc area Rabatel, Antoine Deline, Philip Jaillet, Stéphane Ravanel, Ludovic 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) 2008-05-28 https://hal.science/halsde-00292415 https://doi.org/10.1029/2008GL033424 en eng HAL CCSD American Geophysical Union info:eu-repo/semantics/altIdentifier/doi/10.1029/2008GL033424 halsde-00292415 https://hal.science/halsde-00292415 doi:10.1029/2008GL033424 ISSN: 0094-8276 EISSN: 1944-8007 Geophysical Research Letters https://hal.science/halsde-00292415 Geophysical Research Letters, 2008, 35 (10502), pp.1-5. ⟨10.1029/2008GL033424⟩ high altitude alpine rockwalls rock falls permafrost degradation laser scanning Mont Blanc massif [SDE.MCG]Environmental Sciences/Global Changes info:eu-repo/semantics/article Journal articles 2008 ftunivsavoie https://doi.org/10.1029/2008GL033424 2024-04-11T00:45:14Z International audience The global warming observed in recent decades and its future increase may affect permafrost distribution on high-mountain faces with consequences for their stability. In this paper, we show that rock falls from high-alpine rock walls can be computed with a decimetre-resolution using lidar measurements. A laser scanner was used to create point clouds and triangulated irregular network models on the east face of the Tour Ronde at 3792 m asl (Mont Blanc massif). Comparison of the models realised from measurements of July 2005 and July 2006 enabled quantification of rock falls with reduced uncertainty. The volume of rock fall reached a total of 536 m3 in the scanned area, which matches an erosion rate of 8.4 mm yr−1. This rate slightly higher to the ones reported in former studies enable to assume that this rock fall may be the consequence of the permafrost degradation in this rock face. Article in Journal/Newspaper permafrost Université Savoie Mont Blanc: HAL Geophysical Research Letters 35 10 |
institution |
Open Polar |
collection |
Université Savoie Mont Blanc: HAL |
op_collection_id |
ftunivsavoie |
language |
English |
topic |
high altitude alpine rockwalls rock falls permafrost degradation laser scanning Mont Blanc massif [SDE.MCG]Environmental Sciences/Global Changes |
spellingShingle |
high altitude alpine rockwalls rock falls permafrost degradation laser scanning Mont Blanc massif [SDE.MCG]Environmental Sciences/Global Changes Rabatel, Antoine Deline, Philip Jaillet, Stéphane Ravanel, Ludovic Rock falls in high-alpine rock walls quantified by terrestrial lidar measurements : A case study in the Mont Blanc area |
topic_facet |
high altitude alpine rockwalls rock falls permafrost degradation laser scanning Mont Blanc massif [SDE.MCG]Environmental Sciences/Global Changes |
description |
International audience The global warming observed in recent decades and its future increase may affect permafrost distribution on high-mountain faces with consequences for their stability. In this paper, we show that rock falls from high-alpine rock walls can be computed with a decimetre-resolution using lidar measurements. A laser scanner was used to create point clouds and triangulated irregular network models on the east face of the Tour Ronde at 3792 m asl (Mont Blanc massif). Comparison of the models realised from measurements of July 2005 and July 2006 enabled quantification of rock falls with reduced uncertainty. The volume of rock fall reached a total of 536 m3 in the scanned area, which matches an erosion rate of 8.4 mm yr−1. This rate slightly higher to the ones reported in former studies enable to assume that this rock fall may be the consequence of the permafrost degradation in this rock face. |
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) |
format |
Article in Journal/Newspaper |
author |
Rabatel, Antoine Deline, Philip Jaillet, Stéphane Ravanel, Ludovic |
author_facet |
Rabatel, Antoine Deline, Philip Jaillet, Stéphane Ravanel, Ludovic |
author_sort |
Rabatel, Antoine |
title |
Rock falls in high-alpine rock walls quantified by terrestrial lidar measurements : A case study in the Mont Blanc area |
title_short |
Rock falls in high-alpine rock walls quantified by terrestrial lidar measurements : A case study in the Mont Blanc area |
title_full |
Rock falls in high-alpine rock walls quantified by terrestrial lidar measurements : A case study in the Mont Blanc area |
title_fullStr |
Rock falls in high-alpine rock walls quantified by terrestrial lidar measurements : A case study in the Mont Blanc area |
title_full_unstemmed |
Rock falls in high-alpine rock walls quantified by terrestrial lidar measurements : A case study in the Mont Blanc area |
title_sort |
rock falls in high-alpine rock walls quantified by terrestrial lidar measurements : a case study in the mont blanc area |
publisher |
HAL CCSD |
publishDate |
2008 |
url |
https://hal.science/halsde-00292415 https://doi.org/10.1029/2008GL033424 |
genre |
permafrost |
genre_facet |
permafrost |
op_source |
ISSN: 0094-8276 EISSN: 1944-8007 Geophysical Research Letters https://hal.science/halsde-00292415 Geophysical Research Letters, 2008, 35 (10502), pp.1-5. ⟨10.1029/2008GL033424⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1029/2008GL033424 halsde-00292415 https://hal.science/halsde-00292415 doi:10.1029/2008GL033424 |
op_doi |
https://doi.org/10.1029/2008GL033424 |
container_title |
Geophysical Research Letters |
container_volume |
35 |
container_issue |
10 |
_version_ |
1797567796312276992 |