1. Empa, Laboratory for Air Pollution/Environmental Technology Dübendorf 8600 Switzerland
2. ETH Zürich, Department of Earth Sciences Zürich 8092 Switzerland
3. ETH Zurich, Laboratory of Physical Chemistry Zürich 8093 Switzerland
4. Aerodyne Research Inc., Center for Atmospheric and Environmental Chemistry Billerica MA 01821 USA
5. Tokyo Institute of Technology, Earth‐Life Science Institute (ELSI) Tokyo 152‐8550 Japan
6. Tokyo Institute of Technology, Department of Chemical Science and Engineering, School of Materials and Chemical Technology Yokohama 226‐8503 Japan