1. Department of Chemistry and Biochemistry, Cooperative Institute for Research in the Environmental Sciences (CIRES), and Department of Atmospheric and Oceanic Sciences (ATOC), University of Colorado at Boulder, 216 UCB, Boulder, Colorado 80309, Aerodyne Research Inc., Billerica, Massachusetts 01821, Atmospheric Sciences Research Center, State University of New York, Albany, New York 12222, Department of Environmental Sciences, University of California, Riverside, California 92521, and Laboratory of...