Regional modelling of present, past and future potential distribution of discontinuous permafrost based on a rock glacier inventory in the Bagnes-Hérémence area (Western Swiss Alps).

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Etat: Public
Version: Final published version
Licence: Tous droits réservés
ID Serval
serval:BIB_30785
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Institution
Titre
Regional modelling of present, past and future potential distribution of discontinuous permafrost based on a rock glacier inventory in the Bagnes-Hérémence area (Western Swiss Alps).
Périodique
Norsk Geografisk Tidsskrift-Norwegian Journal of Geography
Auteur⸱e⸱s
Lambiel C, Reynard E
Statut éditorial
Publié
Date de publication
2001
Peer-reviewed
Oui
Volume
55
Pages
219-223
Langue
anglais
Résumé
A regional model was used to draw the permafrost distribution in the 200 km 2 of the Bagnes-Hérémence area (Western Swiss Alps). The model is based on the fact that permafrost distribution depends mainly on altitude and orientation and that the minimal altitude of active/inactive rock glaciers can be used as an indicator of the lower limit of discontinuous permafrost. The lower limit of relict rock glaciers is also used as an indicator of past distribution of permafrost. An inventory of rock glaciers was therefore made in the study area. The lower limit of permafrost during the Younger Dryas was determined by comparing the position of relict rock glaciers and glacier extension during the Older Dryas. The model was then applied to four periods (Younger Dryas, Little Ice Age, current period and future) in order to show the temporal evolution of permafrost distribution and glacier extension.
Mots-clé
Glaciers, Permafrost Modelling, Rock Glacier Inventory, Swiss Alps
Création de la notice
19/11/2007 9:59
Dernière modification de la notice
31/01/2024 7:25
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