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Modelling the permafrost distribution in steep rock walls in Norway

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doi: 10.17850/njg96-4-04
Authors:Steiger, Céline; Etzelmüller, Bernd; Westermann, Sebastian; Myhra, Kristin S.
Author Affiliations:Primary:
University of Oslo, Department of Geosciences, Oslo, Norway
Volume Title:Norsk Geologisk Tidsskrift Norwegian Journal of Geology
Source:Norsk Geologisk Tidsskrift = Norwegian Journal of Geology, 96(4), p.329-341. Publisher: Geological Society of Norway, Trondheim, Norway. ISSN: 0029-196X
Publication Date:2016
Note:In English. 39 refs.; illus., incl. geol. sketch maps
Summary:In many cold mountain areas, permafrost is a key factor for the stability of rock walls. This study provides a regional assessment of potential permafrost occurrence in steep rock walls in Norway. We present a map of steep rock walls with possible permafrost occurrence for Norway. This map is created from interpolated and gridded surface air temperature data and a terrain analysis based on a 10 m digital elevation model (DEM). The results are evaluated against field observations, a rock glacier inventory and local rock-wall temperature measurements. We show that permafrost in steep rock walls is found in around 9% of all the steep rock walls in Norway. Most frequently these are found in central southern Norway and in the Lyngen-Kafjord area in Northern Norway. The study discusses the spatial distribution pattern of permafrost rock walls, and shows that in Northern Norway mapped rock-slope failures are in close association with permafrost rock walls.
Subjects:Bedrock; Digital terrain models; Geologic hazards; Geomorphology; Models; Natural hazards; Permafrost; Simulation; Slope stability; Slopes; Spatial distribution; Temperature; Europe; Scandinavia; Scandinavian Mountains; Western Europe
Record ID:813860-4
Copyright Information:GeoRef, Copyright 2020 American Geosciences Institute.
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