David W Gallaher¹, Richard Arthur McAllister², Christopher K Pankratz³, James Craft³, Glenn Grant⁴ and Kevin M Schaefer⁵, (1)National Snow and Ice Data Center, Boulder, CO, United States, (2)Montana State University, Computer Science, Bozeman, MT, United States, (3)University of Colorado, Laboratory for Atmospheric and Space Physics, Boulder, CO, United States, (4)CIRES, Port Townsend, WA, United States, (5)National Snow and Ice Data Center, Cooperative Institute for Research in the Environmental Sciences, University of Colorado at Boulder, Boulder, Colorado, U.S.A, Boulder, CO, United States