Titre
Internal Structure and Current Evolution of Very Small Debris-Covered Glacier Systems Located in Alpine Permafrost Environments
Type
article
Institution
UNIL/CHUV/Unisanté + institutions partenaires
Périodique
Auteur(s)
Bosson, J.-B.
Auteure/Auteur
Lambiel, C.
Auteure/Auteur
Liens vers les personnes
Liens vers les unités
ISSN
2296-6463
Statut éditorial
Publié
Date de publication
2016
Volume
4
Première page
1
Dernière page/numéro d’article
17
Peer-reviewed
Oui
Langue
anglais
Résumé
This contribution explores the internal structure of very small debris-covered glacier systems located in permafrost environments and their current dynamical responses to short-term climatic variations. Three systems were investigated with electrical resistivity tomography and dGPS monitoring over a 3-year period. Five distinct sectors are highlighted in each system: firn and bare-ice glacier, debris-covered glacier, heavily debris-covered glacier of low activity, rock glacier and ice-free debris. Decimetric to metric movements, related to ice ablation, internal deformation and basal sliding affect the glacial zones, which are mainly active in summer. Conversely, surface lowering is close to zero (−0.04m yr−1) in the rock glaciers. Here, a constant and slow internal deformation was observed (c. 0.2m yr−1). Thus, these systems are affected by both direct and high magnitude responses and delayed and attenuated responses to climatic variations. This differential evolution appears mainly controlled by (1) the proportion of ice, debris and the presence of water in the ground, and (2) the thickness of the superficial debris layer.
PID Serval
serval:BIB_89BCCAD898EB
URL éditeur
Open Access
Oui
Date de création
2016-04-13T10:49:56.187Z
Date de création dans IRIS
2025-05-21T02:08:55Z
Fichier(s)![Vignette d'image]()
En cours de chargement...
Nom
BIB_89BCCAD898EB.P001.pdf
Version du manuscrit
published
Licence
https://creativecommons.org/licenses/by/4.0
Taille
12.22 MB
Format
Adobe PDF
PID Serval
serval:BIB_89BCCAD898EB.P001
URN
urn:nbn:ch:serval-BIB_89BCCAD898EB7
Somme de contrôle
(MD5):4ef03ed187211b6f4077eb05b82d8649