1. NOAA Chemical Sciences Laboratory, Boulder, Colorado 80305, United States
2. Cooperative Institute for Research in Environmental Sciences, University of Colorado Boulder, Boulder, Colorado 80309, United States
3. Department of Chemistry, University of Colorado Boulder, Boulder, Colorado 80309, United States
4. Department of Chemical and Environmental Engineering and College of Engineering-Center for Environmental Research and Technology (CE-CERT), University of California, Riverside, Riverside, California 92507, United States
5. Atmospheric Chemistry Observations and Modeling Laboratory, National Center for Atmospheric Research, Boulder, Colorado 80301, United States
6. Department of Atmospheric Sciences, University of Washington, Seattle, Washington 98195, United States
7. Department of Earth, Ocean and Atmospheric Science, Florida State University, Tallahassee, Florida 32306, United States
8. Space Science and Engineering Center, University of Wisconsin−Madison, Madison, Wisconsin 53715, United States
9. Graduate School of Nanobioscience, Yokohama City University, Yokohama, Kanagawa 236-0027, Japan
10. Department of Chemistry and Biochemistry, University of Montana, Missoula, Montana 59812, United States