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Modelling the permafrost distribution in steep rock walls in Norway
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|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|
|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|
|Copyright Information:||GeoRef, Copyright 2020 American Geosciences Institute.|
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