National Center for Atmospheric Research, P. O. Box 3000, Boulder, CO 80307 United States
National Center for Atmospheric Research, P. O. Box 3000, Boulder, CO 80307 United States ; Chemistry Department, University of Colorado, Boulder, CO 80309 United States ;
Chemistry Department, University of Colorado, Boulder, CO 80309 United States ;
Centro de Ciencias de la Atmósfera, Universidad Nacional Autónoma de México, México City, 04510 Mexico ;
Centro de Ciencias de la Atmósfera, Universidad Nacional Autónoma de México, México City, 04510 Mexico ;
Mechanical Engineering Department, University of Minnesota, Minneapolis, MN 55455 United States ;