Thermal conditions of rock slopes below unstable infrastructure in Alpine permafrost area : the cases of the Cosmiques hut and the Grands Montets cable-car station (Mont Blanc massif)
Poster Thermal state of steep permafrost-affected rock faces is crucial to assess the safety and reliability of mountain infrastructure as current permafrost degradation affects the rock slope stability. In the Mont-Blanc massif, 23 infrastructures are built on such a rock face with 13 of them that...
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fttriple:oai:gotriple.eu:10670/1.z0jpks 2023-05-15T17:56:52+02:00 Thermal conditions of rock slopes below unstable infrastructure in Alpine permafrost area : the cases of the Cosmiques hut and the Grands Montets cable-car station (Mont Blanc massif) Duvillard, P.A Magnin, Florence Moertl, Christian Ravanel, Ludovic Josnin, Jean-Yves Deline, Philip 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) Technische Universität Munchen - Université Technique de Munich Munich, Allemagne (TUM) European Geosciences Union Vienne, Austria 2017-04-23 https://hal-sde.archives-ouvertes.fr/hal-01765866 en eng HAL CCSD hal-01765866 10670/1.z0jpks https://hal-sde.archives-ouvertes.fr/hal-01765866 undefined Hyper Article en Ligne - Sciences de l'Homme et de la Société EGU 2017 EGU 2017, Apr 2017, Vienne, Austria. 2017 geo envir Conference Output https://vocabularies.coar-repositories.org/resource_types/c_c94f/ 2017 fttriple 2023-01-22T17:37:39Z Poster Thermal state of steep permafrost-affected rock faces is crucial to assess the safety and reliability of mountain infrastructure as current permafrost degradation affects the rock slope stability. In the Mont-Blanc massif, 23 infrastructures are built on such a rock face with 13 of them that are characterized by a high risk of destabilization (Duvillard et al., 2015), including the upper station of the Grands Montets cable car (3325 m a.s.l.) as well as the Cosmiques hut (3613 m a.s.l.) on which we will focus. These two buildings have already been affected by different geomorphological processes. A rockfall event (600 m3) occurred for example on the SE face on the Arête inférieure des Cosmiques on the 21st of August 1998 (Ravanel et al., 2013) and the Grands Montets case shows a slow subsidence of the stairway over the last decade. In order to better assess the role of the permafrost in these processes and to gain insight on possible future geomorphic activity, we characterized the current permafrost conditions and simulated its changes up to the end of the 21st century using two complementary approaches: (i) the result of ERT (Electrical Resistivity Tomography) surveys carried out in October 2016 on the northern and southern faces right below the Cosmiques hut (at the level of the foundations) and at the Aiguilles des Grands Montets; (ii) the modeling of mean annual rock surface temperature for 2016 and at the end of the 21st century (Magnin et al., in rev.). Duvillard P.-A., Ravanel L., Deline P. (2015). Risk assessment of infrastructure destabilisation due to global warming in the high French Alps. Journal of Alpine Research, 103 (2). Magnin F., Josnin J.-Y., Ravanel L., Pergaud J., Pohl B., Deline P. (in rev.). Modelling rock wall permafrost degradation in the Mont Blanc massif from the LIA to the end of the 21st century. The Cryosphere Discuss. Other/Unknown Material permafrost Unknown Deline ENVELOPE(-123.406,-123.406,65.198,65.198) Mont Blanc ENVELOPE(69.468,69.468,-49.461,-49.461) |
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language |
English |
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geo envir |
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geo envir Duvillard, P.A Magnin, Florence Moertl, Christian Ravanel, Ludovic Josnin, Jean-Yves Deline, Philip Thermal conditions of rock slopes below unstable infrastructure in Alpine permafrost area : the cases of the Cosmiques hut and the Grands Montets cable-car station (Mont Blanc massif) |
topic_facet |
geo envir |
description |
Poster Thermal state of steep permafrost-affected rock faces is crucial to assess the safety and reliability of mountain infrastructure as current permafrost degradation affects the rock slope stability. In the Mont-Blanc massif, 23 infrastructures are built on such a rock face with 13 of them that are characterized by a high risk of destabilization (Duvillard et al., 2015), including the upper station of the Grands Montets cable car (3325 m a.s.l.) as well as the Cosmiques hut (3613 m a.s.l.) on which we will focus. These two buildings have already been affected by different geomorphological processes. A rockfall event (600 m3) occurred for example on the SE face on the Arête inférieure des Cosmiques on the 21st of August 1998 (Ravanel et al., 2013) and the Grands Montets case shows a slow subsidence of the stairway over the last decade. In order to better assess the role of the permafrost in these processes and to gain insight on possible future geomorphic activity, we characterized the current permafrost conditions and simulated its changes up to the end of the 21st century using two complementary approaches: (i) the result of ERT (Electrical Resistivity Tomography) surveys carried out in October 2016 on the northern and southern faces right below the Cosmiques hut (at the level of the foundations) and at the Aiguilles des Grands Montets; (ii) the modeling of mean annual rock surface temperature for 2016 and at the end of the 21st century (Magnin et al., in rev.). Duvillard P.-A., Ravanel L., Deline P. (2015). Risk assessment of infrastructure destabilisation due to global warming in the high French Alps. Journal of Alpine Research, 103 (2). Magnin F., Josnin J.-Y., Ravanel L., Pergaud J., Pohl B., Deline P. (in rev.). Modelling rock wall permafrost degradation in the Mont Blanc massif from the LIA to the end of the 21st century. The Cryosphere Discuss. |
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) Technische Universität Munchen - Université Technique de Munich Munich, Allemagne (TUM) European Geosciences Union |
format |
Other/Unknown Material |
author |
Duvillard, P.A Magnin, Florence Moertl, Christian Ravanel, Ludovic Josnin, Jean-Yves Deline, Philip |
author_facet |
Duvillard, P.A Magnin, Florence Moertl, Christian Ravanel, Ludovic Josnin, Jean-Yves Deline, Philip |
author_sort |
Duvillard, P.A |
title |
Thermal conditions of rock slopes below unstable infrastructure in Alpine permafrost area : the cases of the Cosmiques hut and the Grands Montets cable-car station (Mont Blanc massif) |
title_short |
Thermal conditions of rock slopes below unstable infrastructure in Alpine permafrost area : the cases of the Cosmiques hut and the Grands Montets cable-car station (Mont Blanc massif) |
title_full |
Thermal conditions of rock slopes below unstable infrastructure in Alpine permafrost area : the cases of the Cosmiques hut and the Grands Montets cable-car station (Mont Blanc massif) |
title_fullStr |
Thermal conditions of rock slopes below unstable infrastructure in Alpine permafrost area : the cases of the Cosmiques hut and the Grands Montets cable-car station (Mont Blanc massif) |
title_full_unstemmed |
Thermal conditions of rock slopes below unstable infrastructure in Alpine permafrost area : the cases of the Cosmiques hut and the Grands Montets cable-car station (Mont Blanc massif) |
title_sort |
thermal conditions of rock slopes below unstable infrastructure in alpine permafrost area : the cases of the cosmiques hut and the grands montets cable-car station (mont blanc massif) |
publisher |
HAL CCSD |
publishDate |
2017 |
url |
https://hal-sde.archives-ouvertes.fr/hal-01765866 |
op_coverage |
Vienne, Austria |
long_lat |
ENVELOPE(-123.406,-123.406,65.198,65.198) ENVELOPE(69.468,69.468,-49.461,-49.461) |
geographic |
Deline Mont Blanc |
geographic_facet |
Deline Mont Blanc |
genre |
permafrost |
genre_facet |
permafrost |
op_source |
Hyper Article en Ligne - Sciences de l'Homme et de la Société EGU 2017 EGU 2017, Apr 2017, Vienne, Austria. 2017 |
op_relation |
hal-01765866 10670/1.z0jpks https://hal-sde.archives-ouvertes.fr/hal-01765866 |
op_rights |
undefined |
_version_ |
1766165177804259328 |