1. Science Applications International Corporation, McLean, Virginia, and Hydrological Sciences Laboratory, NASA Goddard Space Flight Center, Greenbelt, Maryland
2. Hydrological Sciences Laboratory, NASA Goddard Space Flight Center, Greenbelt, Maryland
3. Science Applications International Corporation, McLean, Virginia, and Global Modeling and Assimilation Office, and Hydrological Sciences Laboratory, NASA Goddard Space Flight Center, Greenbelt, Maryland
4. Global Modeling and Assimilation Office, NASA Goddard Space Flight Center, Greenbelt, Maryland
5. Earth System Science Interdisciplinary Center, University of Maryland, College Park, College Park, and Hydrological Sciences Laboratory, NASA Goddard Space Flight Center, Greenbelt, Maryland
6. I. M. Systems Group, Inc., and NOAA/NCEP/Environmental Modeling Center, College Park, Maryland
7. NOAA/NCEP/Environmental Modeling Center, College Park, Maryland
8. Science Systems and Applications, Inc., Lanham, and Cryospheric Sciences Branch, NASA Goddard Space Flight Center, Greenbelt, Maryland
9. Cooperative Institute for Research in Environmental Sciences, Boulder, Colorado
10. Hydrology and Remote Sensing Laboratory, Agricultural Research Service, USDA, McLean, Virginia