Joshua Pettit, University of Colorado, Atmospheric and Oceanic Science, Boulder, CO, United States, Cora E Randall, Univ Colorado, Boulder, CO, United States, Xiaohua Fang, University of Colorado at Boulder, Boulder, CO, United States, Daniel Robert Marsh, National Center for Atmospheric Research, Boulder, CO, United States and Ethan D Peck, Columbia University of New York, Palisades, NY, United States