Atmospheric Chemistry Division, National Center for Atmospheric Research, PO Box 3000, Boulder, CO 80305-5000, United States ; Department of Physics, University of Helsinki, Gustaf Hallstromin katu 2, Univ Helsinki, 00014, Finland
Atmospheric Chemistry Division, National Center for Atmospheric Research, PO Box 3000, Boulder, CO 80305-5000, United States
Department of Atmospheric and Oceanic Sciences, UCB 311 University of Colorado, Boulder, CO 80309-0311, ; Atmospheric Chemistry Division, National Center for Atmospheric Research, PO Box 3000, Boulder, CO 80305-5000, United States
Atmospheric Chemistry Division, National Center for Atmospheric Research, PO Box 3000, Boulder, CO 80305-5000, United States
Department of Physics, University of Helsinki, Gustaf Hallstromin katu 2, Univ Helsinki, 00014, Finland
Atmospheric Science Progam, Department of Geography, Indiana University, 701 E. Kirkwood Ave., Bloomington, IN 47405, United States