1. Earth System Science Interdisciplinary Center, University of Maryland,College Park, Maryland,USA
2. NASA Goddard Space Flight Center,Greenbelt, Maryland,USA
3. Flathead Lake Biological Station, Division of Biological Sciences, University of Montana,Polson, Montana,USA
4. Numerical Terradynamic Simulation Group, College of Forestry and Conservation, University of Montana,Missoula, Montana,USA
5. Pacific Northwest National Laboratory,Richland, Washington,USA