Jana von Freyberg^1,2, Tanja R. Bjarnadóttir³ and Scott T Allen², (1)WSL Swiss Federal Institute for Forest, Snow and Landscape Research, Research Unit Mountain Hydrology and Mass Movements, Birmensdorf, Switzerland, (2)ETH Swiss Federal Institute of Technology Zurich, Department of Environmental Systems Science, Zurich, Switzerland, (3)ETH Swiss Federal Institute of Technology Zurich, Department of Civil, Environmental and Geomatic Engineering, Zurich, Switzerland