Estimating glacier-bed overdeepenings as possible sites of future lakes in the de-glaciating Mont Blanc massif (Western European Alps)

International audience De-glaciating high mountain areas result in new landscapes of bedrock and debris where permafrost can degrade, persist or even newly form in cases, and of new lakes in glacier bed overdeepenings (GBOs) becoming ice-free. These landscapes with new lakes in close neighborhood to...

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Bibliographic Details
Published in:Geomorphology
Main Authors: Magnin, Florence, Haeberli, W., Linsbauer, A., Deline, P., Ravanel, Ludovic
Other Authors: 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), Universität Zürich Zürich (UZH), University of Fribourg
Format: Article in Journal/Newspaper
Language:English
Published: HAL CCSD 2020
Subjects:
High mountains
De-glaciating landscapes
Glacier-bed overdeepenings
Potential future lakes
[SDU.STU.GM]Sciences of the Universe [physics]/Earth Sciences/Geomorphology
[SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology
Mont Blanc
New Lakes
Ice
permafrost
Online Access:https://hal.archives-ouvertes.fr/hal-02440662
https://hal.archives-ouvertes.fr/hal-02440662/document
https://hal.archives-ouvertes.fr/hal-02440662/file/Magnin_et_al_Gemorphology_revised_fig.pdf
https://doi.org/10.1016/j.geomorph.2019.106913
Description
Summary:International audience De-glaciating high mountain areas result in new landscapes of bedrock and debris where permafrost can degrade, persist or even newly form in cases, and of new lakes in glacier bed overdeepenings (GBOs) becoming ice-free. These landscapes with new lakes in close neighborhood to over-steepened and perennially frozen slopes are prone to chain reaction processes (e.g. rock-ice avalanches into lakes triggering impact waves, dam breach or overtopping, and debris flows) with potentially far-reaching

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