1. Département Dynamiques Internes et de Surface des Continents (DISCO - IGE),; University Grenoble Alps, Institute of Research for Development; CS 40700, 38 058 Grenoble Cedex 9 France
2. Department of Geography; University of Utah; 332 1400 E Salt Lake City UT 84112 USA
3. National Snow and Ice Data Center; University of Colorado; 216 UCB Boulder CO 80309 USA
4. Department of Geology and Geophysics; University of Utah; Frederick Albert Sutton Building, 115 S 1460 E #383 Salt Lake City UT 84112 USA
5. Department of Geology; University of Maryland; 8000 Regents Dr., College Park Maryland 20742 USA
6. Institute for Marine and Atmospheric research Utrecht (IMAU); Utrecht University; P.O. Box 80000, 3508 TA Utrecht The Netherlands
7. Cryospheric Sciences Laboratory, Earth Science Division, Science and Exploration Directorate; NASA Goddard Space Flight Center; 8800 Greenbelt Rd Greenbelt MD 20771 USA
8. Goddard Earth Sciences Technology and Research Studies and Investigations; Universities Space Research Association, NASA Goddard Space Flight Center; Building 33, H102 Greenbelt MD 20771 USA