1. Department of Chemistry, Northwestern University, 2145 Sheridan
Road, Evanston, Illinois 60208, United States
2. Scripps Institution of Oceanography, University of California, San Diego, La Jolla, California
92093, United States
3. Max Planck Institute for Chemistry, 55128 Mainz, Germany
4. Department of Environmental
Science, Policy and Management, University of California, Berkeley, California 94720, United States
5. Aerosol Dynamics, Inc., Berkeley, California 94710, United States
6. Department of Physics, FI-00014 University of Helsinki, Finland
7. Department of Civil
and Environmental Engineering, University of California, Berkeley, California 94720, United States
8. Institute of Physics, University of São Paolo, Rua do Matão,
Travessa R, 187, 05508-090, São Paolo, Brazil
9. School of Engineering and Applied Sciences & Department of Earth and Planetary Sciences, Harvard University, 29 Oxford Street, Cambridge, Massachusetts 02138, United States