Brief communication: Weak control of snow avalanche deposit volumes by avalanche path morphology

International audience Abstract. Snow avalanches are a major component of the mountain cryosphere, but little is known about the factors controlling the variability of their deposit volumes. This study investigates the influence of avalanche path morphology on ca. 1500 deposit volumes recorded betwe...

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Bibliographic Details
Published in:The Cryosphere
Main Authors: Kern, Hippolyte, Eckert, Nicolas, Jomelli, Vincent, Grancher, Delphine, Deschatres, Michael, Arnaud-Fassetta, Gilles
Other Authors: Laboratoire de géographie physique : Environnements Quaternaires et Actuels (LGP), Université Paris 1 Panthéon-Sorbonne (UP1)-Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12)-Centre National de la Recherche Scientifique (CNRS)
Format: Article in Journal/Newspaper
Language:English
Published: HAL CCSD 2021
Subjects:
[SHS.GEO]Humanities and Social Sciences/Geography
The Cryosphere
Online Access:https://hal.science/hal-03993329
https://doi.org/10.5194/tc-15-4845-2021
Description
Summary:International audience Abstract. Snow avalanches are a major component of the mountain cryosphere, but little is known about the factors controlling the variability of their deposit volumes. This study investigates the influence of avalanche path morphology on ca. 1500 deposit volumes recorded between 2003 and 2018 in 77 snow avalanche paths of the French Alps. Different statistical techniques show a slight but significant link between deposit volumes and path mean elevation and orientation, with contrasted patterns between winter and spring seasons. The limited and partially non-linear nature of this control may result from the combined influence on the genesis of deposit volumes of mean path activity, climate conditions, and mechanical thresholds determining avalanche release.

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