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On the Connection between Debris Flow Activity and Permafrost Degradation: A Case Study from the Schnalstal, South Tyrolean Alps, Italy

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  • K. Sattler
  • M. Keiler
  • A. Zischg
  • L. Schrott

Abstract

The possible influence of permafrost degradation on the formation of debris flows in an area of the South Tyrolean Alps, Italy, was examined by comparing debris flow activity since 1983 with the modelled contemporary permafrost distribution. The study focused on the spatial congruence of new initiation zones and potentially marginal permafrost, which should be especially sensitive to climatic change and is presumed to be currently degrading. The results show that distinct changes in the spatial position of debris flow initiation areas mainly occurred at elevations above this marginal zone. Consequently, the changes detected in debris flow activity do not appear to have been influenced by atmospheric warming‐induced degradation of permafrost. However, a link may exist to the thickening of the active layer caused by the melting of a glacier. Copyright © 2011 John Wiley & Sons, Ltd.

Suggested Citation

  • K. Sattler & M. Keiler & A. Zischg & L. Schrott, 2011. "On the Connection between Debris Flow Activity and Permafrost Degradation: A Case Study from the Schnalstal, South Tyrolean Alps, Italy," Permafrost and Periglacial Processes, John Wiley & Sons, vol. 22(3), pages 254-265, July.
    • Handle: RePEc:wly:perpro:v:22:y:2011:i:3:p:254-265
    DOI: 10.1002/ppp.730
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    Cited by:

    1. Sven Fuchs & Margreth Keiler & Sergey Sokratov & Alexander Shnyparkov, 2013. "Spatiotemporal dynamics: the need for an innovative approach in mountain hazard risk management," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 68(3), pages 1217-1241, September.

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