1. Flathead Lake Biological Station, The University of Montana, Polson, MT 59860, USA
2. Numerical Terradynamic Simulation Group, The University of Montana, Missoula, MT 59812, USA
3. Department of Organismic and Evolutionary Biology, Harvard University, Cambridge, MA 02138, USA
4. Department of Electrical and Computer Engineering, The University of Arizona, Tucson, AZ 85721, USA
5. Earth System Science, The University of California, Irvine, CA 92697, USA
6. Earth and Atmospheric Sciences, The City College of New York, New York, NY 10031, USA
7. Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA 91109, USA