1. Department of Geography, RWTH Aachen University, Templergraben 55, 52056 Aachen, Germany
2. Department of Geography, Friedrich-Alexander-Universität Erlangen-Nürnberg, Wetterkreuz 15, 91058 Erlangen, Germany
3. Institute of Meteorology and Geophysics, University of Innsbruck, Innrain 52f, 6020 Innsbruck, Austria
4. Institute of Cartography, Dresden University of Technology, Helmholtzstrasse 10, 01069 Dresden, Germany
5. Department of Ecology, Technische Universitaet Berlin, Rothenburgstrasse 12, 12165 Berlin, Germany
6. Key Laboratory of Tibetan Environment Changes and Land Surface Processes, Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Lin Cui Road, Chaoyang District, Beijing 100101, China
7. Center for Excellence in Tibetan Plateau Earth Sciences, Chinese Academy of Sciences, Lin Cui Road, Chaoyang District, Beijing 100101, China
8. Department of Geography, Eberhard Karls University, Rümelinstrasse 19-23, 72070 Tübingen, Germany
9. State Key Laboratory of Cryospheric Sciences, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, 320 Donggang West Road, Lanzhou 730000, China