1. Department of Atmospheric Science, Colorado State University, Fort Collins, CO 80523, USA
2. Environmental Sciences Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831-6335, USA
3. Met Office, Hadley Centre for Climate Prediction and Research, Bracknell, Berkshire RG12 2SY, UK
4. Cooperative Institute for Research in Environmental Sciences and Department of Geography, CB 216, University of Colorado, Boulder, CO 80309, USA
5. Energy and Resources Group, 310 Barrows Hall, University of California, Berkeley, CA 94720-2050, USA
6. Department of Marine, Earth and Atmospheric Sciences, North Carolina State University, Raleigh, NC 27695-7236, USA
7. Numerical Terradynamic Simulation Group, University of Montana, Missoula, MT 59812, USA