1. Atmospheric Chemistry Observations and Modeling Laboratory and Mesoscale and Microscale Meteorology Laboratory National Center for Atmospheric Research Boulder Colorado USA
2. Department of Atmospheric and Oceanic Sciences University of Colorado Boulder Boulder Colorado USA
3. Laboratory for Atmospheric and Space Physics University of Colorado Boulder Boulder Colorado USA
4. Institute for Arctic and Alpine Research University of Colorado Boulder Boulder CO USA
5. Division of Geology and Planetary Sciences California Institute of Technology Pasadena California USA
6. Joint Center for Earth Systems Technology University of Maryland, Baltimore County/NASA Goddard Space Flight Center Greenbelt Maryland USA
7. Department of Chemistry University of California Irvine California USA
8. School of Meteorology University of Oklahoma Norman Oklahoma USA
9. Department of Meteorology Pennsylvania State University University Park Pennsylvania USA
10. Program in Atmospheric and Oceanic Sciences Princeton University Princeton New Jersey USA
11. Geophysical Fluid Dynamics Laboratory, NOAA Princeton New Jersey USA
12. NOAA‐Air Resources Laboratory College Park Maryland USA
13. Chemical Sciences Division, Earth System Research Laboratory National Oceanic and Atmospheric Administration Boulder Colorado USA
14. Atmospheric Sciences Department Colorado State University Fort Collins Colorado USA
15. Cooperative Institute for Research in Environmental Sciences University of Colorado Boulder Boulder Colorado USA
16. University of California Berkeley California USA
17. Now at Department of Chemistry and Biochemistry and Cooperative Institute for Research in Environmental Sciences University of Colorado Boulder Boulder Colorado USA
18. Georgia Institute of Technology Atlanta Georgia USA