1. Earth System Research Laboratory, Chemical Sciences
Division, National Oceanic and Atmospheric Administration, Boulder, Colorado 80305-3337, United States
2. Cooperative
Institute for Research in Environmental Sciences, University of Colorado, Boulder, Colorado 80305, United States
3. Department of Chemistry, University of Warsaw, Warsaw, Poland
4. Deutsches Zentrum für Luft- und Raumfahrt, Institut für Physik der Atmosphäre, Oberpfaffenhofen, Germany
5. Laboratorium für Atmosphärenphysik, ETH-Zurich, CH-8093 Zurich, Switzerland