The Cryosphere Discuss., https://doi.org/10.5194/tc-2018-235 Manuscript under review for journal The Cryosphere Discussion started: 7 January 2019 c Author(s) 2019. CC BY 4.0 License. Distinguishing ice-rich and ice-poor permafrost to map ground temperatures and -ice content in the Swiss Alps Robert Kenner1, Jeannette Noetzli1, Martin Hoelzle2, Hugo Raetzo3, Marcia Phillips1 1 WSL Institute for Snow and Avalanche Research SLF 5 2 University of Fribourg, Department of Geosciences 3 Federal Office for the Environment FOEN Correspondence to: Robert Kenner (
[email protected]) Abstract. A new countrywide permafrost distribution map of Switzerland is presented, indicating ground temperatures and ice content. The new representation of ground temperatures is achieved by distinguishing ice-poor and ice-rich permafrost in 10 the modelling process. There is a very significant correlation of ground temperatures with elevation and potential incoming solar radiation in ice-poor and ice-free ground. The distribution of ice-rich permafrost was defined by modelling mass wasting processes and the integration of snow and ice into the ground caused by them. This dual approach allowed a clear improvement in the cartographic representation of permafrost-free elevational belts which are bordered above and below by permafrost. The reproduction of such commonly occurring permafrost gaps allowed a higher mapping accuracy and 15 unambiguity of the mapping zones. Permafrost occurrence is represented by two clearly defined classes: Zone 1 representing modelled ground temperatures and zone 2 indicating excess ground ice outside of zone 1. 58% of 92 validation sites could be definitively classified as having permafrost or no permafrost.