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Recent interannual variations of rock glacier creep in the European Alps


Delaloye, R; Perruchoud, E; Avian, M; Kaufmann, V; Bodin, X; Hausmann, H; Ikeda, A; Kääb, A; Kellerer-Pirklbauer, A; Krainer, K; Lambiel, C; Mihajlovic, D; Staub, B; Roer, I; Thibert, E (2008). Recent interannual variations of rock glacier creep in the European Alps. In: 9th International Conference on Permafrost, Fairbanks, Alaska, 29 June 2008 - 3 July 2008, 343-348.

Abstract

Recent interannual variations of rock glacier surface motion are compared for 16 landforms monitored for a few
years in various parts of the European Alps. Large fluctuations have been observed particularly since 2002. Most investigated rock glaciers have shown a similar behavior whatever their location in the Alpine arc, their size, or their velocity. The observed interannual variations appear to be primarily related to external climatic factors rather than to internal characteristics. They are mostly well correlated with mean annual ground surface temperature shifts with a delay of a few months, reflecting the thermal wave propagation deeper into permafrost. Seasonal factors may also play a significant role: a lower intensity of winter ground freezing and/or a larger winter snow accumulation appear to facilitate a higher rate of rock glacier surface motion.

Abstract

Recent interannual variations of rock glacier surface motion are compared for 16 landforms monitored for a few
years in various parts of the European Alps. Large fluctuations have been observed particularly since 2002. Most investigated rock glaciers have shown a similar behavior whatever their location in the Alpine arc, their size, or their velocity. The observed interannual variations appear to be primarily related to external climatic factors rather than to internal characteristics. They are mostly well correlated with mean annual ground surface temperature shifts with a delay of a few months, reflecting the thermal wave propagation deeper into permafrost. Seasonal factors may also play a significant role: a lower intensity of winter ground freezing and/or a larger winter snow accumulation appear to facilitate a higher rate of rock glacier surface motion.

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Additional indexing

Item Type:Conference or Workshop Item (Paper), refereed, original work
Communities & Collections:07 Faculty of Science > Institute of Geography
Dewey Decimal Classification:910 Geography & travel
Language:English
Event End Date:3 July 2008
Deposited On:22 Jan 2009 15:43
Last Modified:10 Aug 2017 17:37
ISBN:978-0-9800179-2-2
Official URL:http://www.blue-europa.org/nicop_proceedings/2%20Vol%201%20(251-504).pdf
Related URLs:http://www.nicop.org/index.html

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