1. Department of Atmospheric and Oceanic Sciences University of Colorado Boulder CO USA
2. Institute of Arctic and Alpine Research University of Colorado Boulder CO USA
3. School of Earth, Environmental, and Marine Sciences University of Texas Rio Grande Valley Port Isabel TX USA
4. Environmental Studies Program University of Colorado Boulder CO USA
5. Atmospheric Chemistry Observations and Modeling Laboratory, National Center for Atmospheric Research Boulder CO USA
6. Laboratory for Atmospheric and Space Physics University of Colorado Boulder CO USA
7. Department of Environmental Sciences Rutgers University New Brunswick NJ USA
8. Water Power Technologies Office, Department of Energy Washington DC USA
9. Bren School of Environmental Science and Management University of California Santa Barbara CA USA