1. Cooperative Institute for Research in Environmental Sciences; University of Colorado Boulder; Boulder Colorado USA
2. Swiss Federal Institute for Forest; Snow and Landscape Research; Birmensdorf Switzerland
3. Swiss Federal Institute of Technology; Zürich Switzerland
4. École Polytechnique Federal de Lausanne; Switzerland
5. British Antarctic Survey; Cambridge UK
6. National Snow and Ice Data Center/CIRES; University of Colorado Boulder; Boulder Colorado USA
7. Department of Civil Engineering; University of Colorado Boulder; Boulder Colorado USA
8. Department of Earth System Science; University of California Irvine; Irvine California USA
9. Jet Propulsion Laboratory; California Institute of Technology; Pasadena California USA