1. Institute for Atmospheric and Climate Science ETHZ Zurich Switzerland
2. Now at Atmospheric Aerosol Research Institute for Meteorology and Climate Research, KIT Karlsruhe Germany
3. Department of Atmospheric Science Colorado State University Fort Collins CO USA
4. Now at Pacific Northwest National Laboratory Richland WA USA
5. Now at Institute for Atmospheric Physics German Aerospace Center Oberpfaffenhofen‐Wessling Germany
6. Institute for Earth Science Hebrew University Jerusalem Israel
7. Now at Department of Earth and Planetary Sciences Weizmann Institute of Science Rehovot Israel
8. Laboratory of Atmospheric Chemistry Paul Scherrer Institute Villigen Switzerland
9. Empa, Swiss Federal Laboratories for Materials Science and Technology Duebendorf Switzerland
10. Department of Chemistry University of Toronto Toronto Ontario Canada