Zhe Peng, University of Colorado at Boulder, Boulder, CO, United States, Julia M Lee-Taylor, National Center for Atmospheric Research, Boulder, CO, United States; CIRES, Boulder, CO, United States, Bernard Aumont, University Paris-Est Créteil Val de Marne, Créteil Cedex, France and Jose L Jimenez, University of Colorado at Boulder, Department of Chemistry, Boulder, CO, United States