1. Department of Earth and Environmental Sciences University of Illinois at Chicago Chicago Illinois USA
2. College of Earth, Ocean and Atmospheric Sciences Oregon State University Corvallis Oregon USA
3. Department of Applied Mathematics University of Colorado Boulder Boulder Colorado USA
4. Cooperative Institute for Research in Environmental Sciences University of Colorado Boulder Boulder Colorado USA
5. Department of Geography University of Colorado Boulder Boulder Colorado USA
6. National Center for Atmospheric Research Boulder Colorado USA
7. Institute of Arctic and Alpine Research University of Colorado Boulder Boulder Colorado USA
8. Department of Atmospheric and Oceanic Sciences University of Colorado Boulder Boulder Colorado USA