Devon R Dunmire, University of Colorado Boulder, Department of Atmospheric and Oceanic Sciences, Boulder, CO, United States, Jan Lenaerts, University of Colorado, Boulder, ATOC, Boulder, United States, Alison F Banwell, University of Colorado Boulder, CIRES, Boulder, United States, Jeffrey C Shragge, Colorado School of Mines, Golden, CO, United States and Frank Pattyn, Université Libre de Bruxelles, Brussel, Belgium