Velocity Changes of Rock Glaciers and Induced Hazards

• Main Authors: Schoeneich, Philippe, Bodin, Xavier, Echelard, Thomas, Kaufmann, V
• Other Authors: Université Joseph Fourier - Grenoble 1 - Institut de géographie alpine (UJF IGA), Université Joseph Fourier - Grenoble 1 (UJF), 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), GIPSA - Signal Images Physique (GIPSA-SIGMAPHY), Département Images et Signal (GIPSA-DIS), Grenoble Images Parole Signal Automatique (GIPSA-lab), Université Pierre Mendès France - Grenoble 2 (UPMF)-Université Stendhal - Grenoble 3-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Pierre Mendès France - Grenoble 2 (UPMF)-Université Stendhal - Grenoble 3-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Grenoble Images Parole Signal Automatique (GIPSA-lab), Université Pierre Mendès France - Grenoble 2 (UPMF)-Université Stendhal - Grenoble 3-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Pierre Mendès France - Grenoble 2 (UPMF)-Université Stendhal - Grenoble 3-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS), Graz University of Technology Graz (TU Graz)
• Format: Conference Object
• Language: English
• Published: HAL CCSD 2014
• Subjects: Rock glaciers; Permafrost; Hazards; [SDE.MCG]Environmental Sciences/Global Changes; [SDE.BE]Environmental Sciences/Biodiversity and Ecology; [SDE.IE]Environmental Sciences/Environmental Engineering; [SDE.ES]Environmental Sciences/Environmental and Society; [SHS.GEO]Humanities and Social Sciences/Geography; Ice; permafrost
• Online Access: https://hal-sde.archives-ouvertes.fr/hal-01888362

International audience Recent observations and geodetic measurements in the European Alps show thatchanges are occurring on rock glacier dynamics, ranging from moderate velocityvariations to strong acceleration or even total collapse. These changes can berelated to the ground temperature and to climate warming. In most cases, rockglaciers do not represent any serious hazard, except the instability of their surfaceand local rockfalls at the steep front. The surface movements, though moderate,can nevertheless cause damages to sensible infrastructures like cableways orbuildings, if these are not designed to adapt to surface movements. The strongaccelerations observed on some rock glaciers, however, induce a change ofmagnitude, and may threaten in some cases downslope areas. Thus, the presence ofactive or inactive rock glaciers with high ice content must be considered not onlywith regard to present conditions and dynamics, but with respect to possibleevolutions due to climate change.