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| Titel |
Geology, glacier retreat and permafrost degradation as controlling factors of slope instabilities in a high-mountain rock wall: the Monte Rosa east face |
| VerfasserIn |
L. Fischer, A. Kääb, C. Huggel, J. Noetzli |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1561-8633
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| Digitales Dokument |
URL |
| Erschienen |
In: Natural Hazards and Earth System Science ; 6, no. 5 ; Nr. 6, no. 5 (2006-09-11), S.761-772 |
| Datensatznummer |
250003711
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| Publikation (Nr.) |
 copernicus.org/nhess-6-761-2006.pdf |
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| Zusammenfassung |
| The Monte Rosa east face, Italian Alps, is one of the highest flanks in the
Alps (2200–4500 m a.s.l.). Steep hanging glaciers and permafrost cover
large parts of the wall. Since the end of the Little Ice Age (about 1850),
the hanging glaciers and firn fields have retreated continuously. During
recent decades, the ice cover of the Monte Rosa east face experienced an
accelerated and drastic loss in extent. Some glaciers have completely
disappeared. New slope instabilities and detachment zones of gravitational
mass movements developed and enhanced rock fall and debris flow activity was
observed. This study is based on multidisciplinary investigations and shows
that most of the detachment zones of rock fall and debris flows are located
in areas, where the surface ice disappeared only recently. Furthermore, most
of these detachment zones are located in permafrost zones, for the most part
close to the modelled and estimated lower boundary of the regional
permafrost distribution. In the view of ongoing or even enhanced atmospheric
warming and associated changes it is therefore very likely that the slope
instabilities in the Monte Rosa east face will continue to represent a
critical hazard source. |
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