1. School of Earth and Atmospheric Sciences; Georgia Institute of Technology; Atlanta Georgia USA
2. Department of Chemistry; University of Montana; Missoula Montana USA
3. Department of Chemistry and Biochemistry; University of Colorado Boulder; Boulder Colorado USA
4. Cooperative Institute for Research in Environmental Sciences; University of Colorado Boulder; Boulder Colorado USA
5. NASA Langley Research Center; Hampton Virginia USA
6. Department of Chemistry; University of California; Irvine California USA
7. Science Systems and Applications, Inc.; Hampton Virginia USA
8. Division of Geological and Planetary Sciences; California Institute of Technology; Pasadena California USA
9. Atmospheric Chemistry and Dynamics Laboratory; NASA Goddard Space Flight Center; Greenbelt Maryland USA
10. Joint Center for Earth Systems Technology; University of Maryland, Baltimore County; Catonsville Maryland USA
11. Institute for Arctic and Alpine Research; University of Colorado Boulder; Boulder Colorado USA
12. Atmospheric Chemistry Observations and Modeling Laboratory; National Center for Atmospheric Research; Boulder Colorado USA
13. Department of Chemistry; University of Oslo; Oslo Norway
14. Earth System Research Laboratory; National Oceanic and Atmospheric Administration; Boulder Colorado USA
15. Division of Engineering and Applied Science; California Institute of Technology; Pasadena California USA
16. Institute of Ion Physics and Applied Physics; University of Innsbruck; Innsbruck Austria