1. Department of Geosciences, and Earth and Environmental Systems Institute The Pennsylvania State University University Park PA USA
2. Mathematics and Geoscience The Pennsylvania State University DuBois PA USA
3. Department of Earth and Planetary Sciences Washington University St. Louis MO USA
4. Department of Geoscience University of Wisconsin Madison WI USA
5. Cryospheric Sciences Lab NASA Goddard Space Flight Center Greenbelt MD USA
6. Department of Earth and Space Sciences University of Washington Seattle WA USA
7. Department of Earth and Environmental Science Temple University Philadelphia PA USA