1. Aerosol Dynamics Inc., Berkeley, California 94710, United States
2. Department
of Environmental Sciences and Engineering, Gillings School
of Global Public Health, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, United States
3. Now at Atmospheric
Earth and Energy Division, Lawrence Livermore National Laboratory, Livermore, California 94550, United States
4. Now at Institute of Arctic and Alpine Research, University of Colorado, Boulder, Colorado 80309, United States
5. NOAA Earth System Research Laboratory, Boulder, Colorado 80305, United States
6. Department of Atmospheric Sciences, Texas A&M University, College Station, Texas 77843, United States
7. Now
at Department of Atmospheric Environmental Sciences, Pusan National University, Busan, South Korea
8. California Institute of Technology, Pasadena, California 91125, United States
9. Now
at National Exposure Research Laboratory, Environmental Protection Agency, Research Triangle Park, North Carolina 27711, United States
10. Department
of Chemistry, University of Washington, Seattle, Washington 98195, United States
11. Now
at Joint Center for Earth Systems Technology, University of Maryland and NASA Goddard Space Flight Center, Greenbelt, Maryland 20771, United States
12. Now
at Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523, United States
13. Now at ToFWerk AG, Thun, CH-3600, Switzerland
14. Now
at Environmental Alion Science and Technology, EPA Office
of Research and Development, EPA Research and Development, Research Triangle Park, North Carolina 27703, United States
15. Scripps Institution of Oceanography, University of California, San Diego, La Jolla, California 92037, United States
16. Department
of Chemistry, University of Aarhus, Aarhus, DK-8000, Denmark
17. Department
of Atmospheric and Oceanic Sciences, Princeton University, Princeton, New Jersey 08544, United States
18. Geophysical
Fluid Dynamics Laboratory, NOAA, Princeton, New Jersey 08540, United States
19. Air
Resources Laboratory, NOAA, College Park, Maryland 20740, United States
20. Department
of Meteorology, Pennsylvania State University, University Park, Pennsylvania 16802, United States
21. Now at Department
of Civil and Environmental Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
22. Departments
of Environmental Science and Engineering and Chemical Engineering, California Institute of Technology, Pasadena, California 91125, United States
23. Department
of Civil and Environmental Engineering, University of California, Berkeley, California 94720, United States