1. School of Earth and Atmospheric Sciences Georgia Institute of Technology Atlanta Georgia USA
2. Department of Atmospheric Science Colorado State University Fort Collins Colorado USA
3. School of Civil and Environmental Engineering Georgia Institute of Technology Atlanta Georgia USA
4. Cooperative Institute for Research in Environmental Sciences University of Colorado Boulder Colorado USA
5. Chemical Sciences Division, Earth System Research Laboratory NOAA Boulder Colorado USA
6. Marine and Atmospheric Chemistry, Rosenstiel School of Marine and Atmospheric Science University of Miami Miami Florida USA
7. Atmospheric Research and Analysis, Inc. Cary North Carolina USA