Robert L Hawley, Dartmouth College, Hanover, NH, United States, Tom Neumann, NASA Goddard Space Flight Ctr., Greenbelt, MD, United States, Kelly M Brunt, Goddard Earth Science Technology and Research, Greenbelt, MD, United States, C. Max Stevens, University of Washington, Seattle, WA, United States and Tyler C Sutterley, University of California Irvine, Irvine, CA, United States