Climate influence on rockfalls in high-Alpine steep rockwalls: The north side of the Aiguilles de Chamonix (Mont Blanc massif) since the end of the 'Little Ice Age'
International audience Rockfalls fundamentally affect the morphodynamics of high mountain rockwalls, and represent a great danger for both people and infrastructures, but still are poorly known. By comparing old, recent and new photographs, in addition to geomorphological field data, we propose an i...
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ftunivsavoie:oai:HAL:halsde-00674990v1 2024-04-28T08:23:33+00:00 Climate influence on rockfalls in high-Alpine steep rockwalls: The north side of the Aiguilles de Chamonix (Mont Blanc massif) since the end of the 'Little Ice Age' Ravanel, Ludovic Deline, Philip 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) 2010 https://hal.science/halsde-00674990 https://doi.org/10.1177/0959683610374887 en eng HAL CCSD London: Sage info:eu-repo/semantics/altIdentifier/doi/10.1177/0959683610374887 halsde-00674990 https://hal.science/halsde-00674990 doi:10.1177/0959683610374887 ISSN: 0959-6836 EISSN: 1477-0911 The Holocene https://hal.science/halsde-00674990 The Holocene, 2010, 21(2), pp.357-365. ⟨10.1177/0959683610374887⟩ high mountain Mont Blanc massif permafrost photographs post-'Little Ice Age' period rockfall rockwall info:eu-repo/semantics/article Journal articles 2010 ftunivsavoie https://doi.org/10.1177/0959683610374887 2024-04-11T00:18:28Z International audience Rockfalls fundamentally affect the morphodynamics of high mountain rockwalls, and represent a great danger for both people and infrastructures, but still are poorly known. By comparing old, recent and new photographs, in addition to geomorphological field data, we propose an inventory of the rockfalls that occurred since the end of the 'Little Ice Age' on the north side of the Aiguilles de Chamonix (Mont Blanc massif), ranging in volume from 500 to 65 000 m3. These 42 rockfalls occurred after 1947, of which > 70% during the last two decades, with a maximal frequency during the warm summers, especially in 2003. Average elevation of scars (3130 m a.s.l.) close to the lower modelled permafrost limit, and the topography (e.g. spurs) of the affected rock faces enhancing lateral heat fluxes, suggest that a climatically driven permafrost degradation has triggered many of the recent rockfalls in high-Alpine steep rockwalls. Article in Journal/Newspaper Ice permafrost Université Savoie Mont Blanc: HAL The Holocene 21 2 357 365 |
institution |
Open Polar |
collection |
Université Savoie Mont Blanc: HAL |
op_collection_id |
ftunivsavoie |
language |
English |
topic |
high mountain Mont Blanc massif permafrost photographs post-'Little Ice Age' period rockfall rockwall |
spellingShingle |
high mountain Mont Blanc massif permafrost photographs post-'Little Ice Age' period rockfall rockwall Ravanel, Ludovic Deline, Philip Climate influence on rockfalls in high-Alpine steep rockwalls: The north side of the Aiguilles de Chamonix (Mont Blanc massif) since the end of the 'Little Ice Age' |
topic_facet |
high mountain Mont Blanc massif permafrost photographs post-'Little Ice Age' period rockfall rockwall |
description |
International audience Rockfalls fundamentally affect the morphodynamics of high mountain rockwalls, and represent a great danger for both people and infrastructures, but still are poorly known. By comparing old, recent and new photographs, in addition to geomorphological field data, we propose an inventory of the rockfalls that occurred since the end of the 'Little Ice Age' on the north side of the Aiguilles de Chamonix (Mont Blanc massif), ranging in volume from 500 to 65 000 m3. These 42 rockfalls occurred after 1947, of which > 70% during the last two decades, with a maximal frequency during the warm summers, especially in 2003. Average elevation of scars (3130 m a.s.l.) close to the lower modelled permafrost limit, and the topography (e.g. spurs) of the affected rock faces enhancing lateral heat fluxes, suggest that a climatically driven permafrost degradation has triggered many of the recent rockfalls in high-Alpine steep rockwalls. |
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 |
Ravanel, Ludovic Deline, Philip |
author_facet |
Ravanel, Ludovic Deline, Philip |
author_sort |
Ravanel, Ludovic |
title |
Climate influence on rockfalls in high-Alpine steep rockwalls: The north side of the Aiguilles de Chamonix (Mont Blanc massif) since the end of the 'Little Ice Age' |
title_short |
Climate influence on rockfalls in high-Alpine steep rockwalls: The north side of the Aiguilles de Chamonix (Mont Blanc massif) since the end of the 'Little Ice Age' |
title_full |
Climate influence on rockfalls in high-Alpine steep rockwalls: The north side of the Aiguilles de Chamonix (Mont Blanc massif) since the end of the 'Little Ice Age' |
title_fullStr |
Climate influence on rockfalls in high-Alpine steep rockwalls: The north side of the Aiguilles de Chamonix (Mont Blanc massif) since the end of the 'Little Ice Age' |
title_full_unstemmed |
Climate influence on rockfalls in high-Alpine steep rockwalls: The north side of the Aiguilles de Chamonix (Mont Blanc massif) since the end of the 'Little Ice Age' |
title_sort |
climate influence on rockfalls in high-alpine steep rockwalls: the north side of the aiguilles de chamonix (mont blanc massif) since the end of the 'little ice age' |
publisher |
HAL CCSD |
publishDate |
2010 |
url |
https://hal.science/halsde-00674990 https://doi.org/10.1177/0959683610374887 |
genre |
Ice permafrost |
genre_facet |
Ice permafrost |
op_source |
ISSN: 0959-6836 EISSN: 1477-0911 The Holocene https://hal.science/halsde-00674990 The Holocene, 2010, 21(2), pp.357-365. ⟨10.1177/0959683610374887⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1177/0959683610374887 halsde-00674990 https://hal.science/halsde-00674990 doi:10.1177/0959683610374887 |
op_doi |
https://doi.org/10.1177/0959683610374887 |
container_title |
The Holocene |
container_volume |
21 |
container_issue |
2 |
container_start_page |
357 |
op_container_end_page |
365 |
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1797584429041844224 |