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| Titel |
Influence of surface and subsurface heterogeneity on observed borehole temperatures at a mountain permafrost site in the Upper Engadine, Swiss Alps |
| VerfasserIn |
S. Schneider, M. Hoelzle, C. Hauck |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1994-0416
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| Digitales Dokument |
URL |
| Erschienen |
In: The Cryosphere ; 6, no. 2 ; Nr. 6, no. 2 (2012-04-19), S.517-531 |
| Datensatznummer |
250003496
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| Publikation (Nr.) |
 copernicus.org/tc-6-517-2012.pdf |
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| Zusammenfassung |
| Compared to lowland (polar) regions, permafrost in high mountain areas occurs
in a large variety of surface and subsurface materials and textures. This work
presents an eight-year (2002–2010) data set of borehole temperatures for
five different (sub-) surface materials from a high alpine permafrost area,
Murtèl-Corvatsch, Switzerland. The influence of the material on the
thermal regime was investigated by borehole temperature data, the temperature
at the top of the permafrost (TTOP-concept) and the apparent thermal
diffusivity (ATD). The results show that during the last eight years, material-specific temperature changes were more significant than climate-induced
temperature trends. At coarse blocky, ice-rich sites, no changes in active
layer depth were observed, whereas the bedrock and the fine-grained sites
appear to be highly sensitive to changes in the microclimate. The results
confirm that the presence and growth of ice as well as a thermally driven
air circulation within the subsurface are the key factors for the occurence
and preservation of alpine permafrost. |
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