1. Department of Physics & Applied Sciences and Technology North Carolina A&T State University Greensboro NC USA
2. Now at Department of Environmental Sciences and Engineering Gillings School of Global Public Health University of North Carolina at Chapel Hill NC USA
3. NOAA Chemical Sciences Laboratory Boulder CO USA
4. Cooperative Institute for Research in Environmental Sciences University of Colorado Boulder CO USA
5. Now at California Air Resources Board Sacramento CA USA
6. Now at Department of Energy Environmental and Chemical Engineering Washington University in St. Louis St. Louis MO USA
7. National Center of Atmospheric Research Boulder CO USA
8. University of Washington Seattle WA USA
9. NASA Langley Research Center Hampton VA USA
10. NASA Goddard Space Flight Center Atmospheric Chemistry and Dynamics Lab Greenbelt MD USA
11. Joint Center for Earth Systems Technology University of Maryland Baltimore MD USA
12. Department of Chemistry University of Colorado Boulder CO USA