1. Chemical Sciences Division; National Oceanic and Atmospheric Administration; Boulder Colorado USA
2. Global Monitoring Division; National Oceanic and Atmospheric Administration; Boulder Colorado USA
3. Cooperative Institute for Research in Environmental Sciences; University of Colorado; Boulder CO USA
4. Pacific Marine Environmental Laboratory; National Oceanic and Atmospheric Administration; Seattle Washington USA
5. Goddard Institute for Space Studies; National Aeronautics and Space Administration; Greenbelt Maryland USA
6. Department of Chemistry; University of California; Berkeley California USA
7. Langley Research Center, National Aeronautics and Space Administration; Hampton Virginia USA
8. Environmental Energy Technologies Division; Lawrence Berkeley National Laboratory; Berkeley California USA
9. Department of Chemical Engineering; California Institute of Technology; Pasadena California USA
10. Department of Civil and Environmental Engineering; University of California; Berkeley California USA
11. Department of Chemistry and Biochemistry; University of Colorado; Boulder Colorado USA
12. Atmospheric Processes Research Section; California Air Resources Board; Sacramento California USA
13. Department of Earth, Atmospheric, and Planetary Sciences; Massachusetts Institute of Technology; Cambridge MA USA
14. Molina Center for Energy and the Environment; La Jolla CA USA
15. School of Earth and Atmospheric Sciences; Georgia Institute of Technology; Atlanta Georgia USA
16. National Environmental Satellite, Data, and Information Service, National Oceanic and Atmospheric Administration; Madison Wisconsin USA
17. Department of Chemistry and Biochemistry; University of California; San Diego California USA
18. Chemical and Environmental Engineering; University of Arizona; Tucson Arizona USA
19. Department of Atmospheric and Oceanic Sciences; University of California; Los Angeles California USA
20. Environmental Sciences and Engineering; University of North Carolina; Chapel Hill North Carolina USA
21. Atmospheric and Environmental Chemistry; Harvard University; Boston Massachusetts USA