The December 2008 Crammont rock avalanche, Mont Blanc massif area, Italy
International audience Rock avalanching is a very hazardous process in high mountain area. Present climatically induced glacier shrinkage and permafrost degradation could increase its frequency and magnitude. A 0.5 M m3 rock avalanche affected the 400-m-high North face of Mont Crammont (western Ital...
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ftccsdartic:oai:HAL:halsde-00873375v1 2023-05-15T17:56:56+02:00 The December 2008 Crammont rock avalanche, Mont Blanc massif area, Italy Deline, Philip Broccolato, Massimo Noetzli, Jeannette Ravanel, Ludovic Tamburini, Andrea 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) Servizio Geologico della Regione Autonoma Valle d'Aosta Administration Régionale de la vallée d'Aoste Glaciology Geomorphodynamics & Geochronology Rome, Italy 2011 https://hal.archives-ouvertes.fr/halsde-00873375 en eng HAL CCSD halsde-00873375 https://hal.archives-ouvertes.fr/halsde-00873375 Proceedings of the 2nd World landslide Forum, Rome 2nd World landslide Forum https://hal.archives-ouvertes.fr/halsde-00873375 2nd World landslide Forum, 2011, Rome, Italy. pp. 403-408 info:eu-repo/semantics/conferenceObject Conference papers 2011 ftccsdartic 2021-09-12T00:48:59Z International audience Rock avalanching is a very hazardous process in high mountain area. Present climatically induced glacier shrinkage and permafrost degradation could increase its frequency and magnitude. A 0.5 M m3 rock avalanche affected the 400-m-high North face of Mont Crammont (western Italian Alps) on 24/12/ 2008. The main part of the rock mass settled at the rockwall foot, whereas a minor part travelled horizontal and vertical distances of 3,050 and 1,560 m, respectively. The mobility was enhanced by the channelization in two torrent gullies, and the incorporation of snow. Three elements suggest that the rock avalanche could have been triggered by the current degradation of the rockwall permafrost: seepage water in the detachment zone; modelled 'warm' permafrost (T > −2 °C); no other Holocene rock avalanche deposit. Collapsed volume was computed by comparison of pre- and post-event DTMs. Back analysis calculation of the rock avalanche runout suggests a two step event Conference Object 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) |
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Open Polar |
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Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
op_collection_id |
ftccsdartic |
language |
English |
description |
International audience Rock avalanching is a very hazardous process in high mountain area. Present climatically induced glacier shrinkage and permafrost degradation could increase its frequency and magnitude. A 0.5 M m3 rock avalanche affected the 400-m-high North face of Mont Crammont (western Italian Alps) on 24/12/ 2008. The main part of the rock mass settled at the rockwall foot, whereas a minor part travelled horizontal and vertical distances of 3,050 and 1,560 m, respectively. The mobility was enhanced by the channelization in two torrent gullies, and the incorporation of snow. Three elements suggest that the rock avalanche could have been triggered by the current degradation of the rockwall permafrost: seepage water in the detachment zone; modelled 'warm' permafrost (T > −2 °C); no other Holocene rock avalanche deposit. Collapsed volume was computed by comparison of pre- and post-event DTMs. Back analysis calculation of the rock avalanche runout suggests a two step event |
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) Servizio Geologico della Regione Autonoma Valle d'Aosta Administration Régionale de la vallée d'Aoste Glaciology Geomorphodynamics & Geochronology |
format |
Conference Object |
author |
Deline, Philip Broccolato, Massimo Noetzli, Jeannette Ravanel, Ludovic Tamburini, Andrea |
spellingShingle |
Deline, Philip Broccolato, Massimo Noetzli, Jeannette Ravanel, Ludovic Tamburini, Andrea The December 2008 Crammont rock avalanche, Mont Blanc massif area, Italy |
author_facet |
Deline, Philip Broccolato, Massimo Noetzli, Jeannette Ravanel, Ludovic Tamburini, Andrea |
author_sort |
Deline, Philip |
title |
The December 2008 Crammont rock avalanche, Mont Blanc massif area, Italy |
title_short |
The December 2008 Crammont rock avalanche, Mont Blanc massif area, Italy |
title_full |
The December 2008 Crammont rock avalanche, Mont Blanc massif area, Italy |
title_fullStr |
The December 2008 Crammont rock avalanche, Mont Blanc massif area, Italy |
title_full_unstemmed |
The December 2008 Crammont rock avalanche, Mont Blanc massif area, Italy |
title_sort |
december 2008 crammont rock avalanche, mont blanc massif area, italy |
publisher |
HAL CCSD |
publishDate |
2011 |
url |
https://hal.archives-ouvertes.fr/halsde-00873375 |
op_coverage |
Rome, Italy |
long_lat |
ENVELOPE(69.468,69.468,-49.461,-49.461) |
geographic |
Mont Blanc |
geographic_facet |
Mont Blanc |
genre |
permafrost |
genre_facet |
permafrost |
op_source |
Proceedings of the 2nd World landslide Forum, Rome 2nd World landslide Forum https://hal.archives-ouvertes.fr/halsde-00873375 2nd World landslide Forum, 2011, Rome, Italy. pp. 403-408 |
op_relation |
halsde-00873375 https://hal.archives-ouvertes.fr/halsde-00873375 |
_version_ |
1766165252233232384 |