1. Department of Atmospheric Sciences; University of Arizona; Tucson Arizona USA
2. National Center for Atmospheric Research; Boulder Colorado USA
3. Department of Hydrology and Water Resources; University of Arizona; Tucson Arizona USA
4. Biosphere 2, University of Arizona; Tucson Arizona USA
5. Department of Geosciences; Georgia State University; Atlanta Georgia USA
6. Department of Geosciences; University of Arizona; Tucson Arizona USA