Yunqian Zhu, University of Colorado at Boulder, Boulder, CO, United States, Brian Toon, University of Colorado at Boulder, ATOC/LASP, Boulder, CO, United States, Eric J Jensen, National Center for Atmospheric Research, Atmospheric Chemistry Observations and Modeling Laboratory, Boulder, CO, United States, Charles Bardeen, National Center for Atmospheric Research, Boulder, CO, United States and Michael J Mills, National Center for Atmospheric Research, Atmospheric Chemistry, Observations, and Modeling Laboratory, Boulder, CO, United States