1. School of Earth and Atmospheric Sciences, Georgia Institute of Technology, Atlanta, Georgia 30332, United States
2. School of Chemical and Biomolecular Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332, United States
3. Now at Division of Geological and Planetary Sciences, California Institute of Technology, Pasadena, California 91125, United States
4. Department of Chemistry, Truman State University, Kirksville, Missouri 63501, United States
5. Department of Chemistry, University of Iowa, Iowa City, Iowa 52242, United States
6. School of Physics and Centre for Climate and Air Pollution Studies, Ryan Institute, National University of Ireland Galway, Galway H91 TK33, Ireland
7. Now at Institute for Environmental and Climate Research, Jinan University, Guangzhou, Guangdong 511443, China
8. Leibniz Institute for Tropospheric Research, Leipzig, Sachsen 04318, Germany
9. Department of Chemistry, University of Colorado, Boulder, Colorado 80309, United States
10. Cooperative Institute for Research in the Environmental Sciences (CIRES), University of Colorado, Boulder, Colorado 80309, United States