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| Titel |
The effect of permafrost on soil erosion using meteoric 10Be, 137Cs and 239+240Pu in the Eastern Swiss Alps |
| VerfasserIn |
Barbara Pichler, Dagmar Brandová, Christine Alewell, Susan Ivy-Ochs, Peter W. Kubik, Christof Kneisel, Katrin Meusburger, Michael Ketterer, Markus Egli |
| Konferenz |
EGU General Assembly 2013
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 15 (2013) |
| Datensatznummer |
250079606
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| Zusammenfassung |
| Permafrost ecosystems are highly sensitive to climate warming. The expected changes
in the thermal and hydrological soil regime might have crucial consequences on
soil erosion processes. Therefore, the determination of erosional activities on the
long- (since the beginning of soil formation) and mid-term (last 50-60 yr) using
cosmogenic and anthropogenic radionuclides can provide important information on
past and ongoing processes. Permafrost soils in the Alps and their behaviour with
climate change are only rarely studied. The expected new insights will lead to a better
understanding of the processes of high mountain soils and are a further step towards
improving climate-related modelling of fast warming scenarios and increasing system
disequilibria.
Our aim is to quantify soil erosion processes in permafrost soils and nearby unfrozen soils
in the Alpine (sites at 2700 m asl) and the sub-Alpine (sites 1800 m asl) range
of the Swiss Alps (Upper Engadine). We hypothesise that permafrost soils differ
distinctly in their long- and mid-term soil erosion rates due to different water retention
capacities.
Long-term soil erosion was assessed using meteoric 10Be. Meteoric 10Be in a soil profile
was estimated assuming that it is has been deposited as a function of precipitation and
adsorbed in the fine earth fraction ( |
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