Permafrost thaw and destabilization of Alpine rock walls in the hot summer of 2003

Details Permafrost thaw and destabilization of Alpine rock walls in the hot summer of 2003 Permafrost thaw and destabilization of Alpine rock walls in the hot summer of 2003

Jul 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004georl..3113504g&link_type=abstract

Geophysical Research Letters, Volume 31, Issue 13, CiteID L13504

Physics

29

Hydrology: Frozen Ground, Global Change: Geomorphology And Weathering (1824, 1886), Global Change: Impact Phenomena

Scientific paper

Exceptional rockfall occurred throughout the Alps during the unusually hot summer of 2003. It is likely related to the fast thermal reaction of the subsurface of steep rock slopes and a corresponding destabilization of ice-filled discontinuities. This suggests that rockfall may be a direct and unexpectedly fast impact of climate change. Based upon our measurements in Alpine rock faces, we present model simulations illustrating the distribution and degradation of permafrost where the summer of 2003 has resulted in extreme thaw. We argue that hotter summers predicted by climate models for the coming decades will result in reduced stability of many alpine rock walls.

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