Schneider, Sina Hoelzle, Martin Hauck, Christian 2012-04-19 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. application/pdf https://folia.unifr.ch/global/documents/302500 https://folia.unifr.ch/documents/302500/files/hau_iss.pdf eng info:eu-repo/semantics/altIdentifier/doi/10.5194/tc-6-517-2012 info:eu-repo/semantics/openAccess License undefined The Cryosphere. - 2012, vol. 6, p. 517-531 info:eu-repo/classification/udc/556 Influence of surface and subsurface heterogeneity on observed borehole temperatures at a mountain permafrost site in the Upper Engadine, Swiss Alps http://purl.org/coar/resource_type/c_6501