1. Department of Chemistry and Biochemistry University of Montana Missoula MT USA
2. Guizhou Provincial Key Laboratory of Geographic State Monitoring of Watershed Guizhou Education University Guiyang China
3. Atmospheric Chemistry Observations & Modeling Laboratory National Center for Atmospheric Research Boulder CO USA
4. Department of Atmospheric Science Colorado State University Fort Collins CO USA
5. Air Resources Division National Park Service Denver CO USA
6. Department of Atmospheric Sciences University of Washington Seattle WA USA
7. Department of Chemistry Colorado State University Fort Collins CO USA
8. Handix Scientific Boulder CO USA