1. Department of Civil and Environmental Engineering, Princeton University, Princeton, New Jersey
2. Global Modeling and Assimilation Office, NASA Goddard Space Flight Center, Greenbelt, Maryland
3. Research Applications Laboratory, NCAR, Boulder, Colorado
4. Hydrological Sciences Laboratory, NASA Goddard Space Flight Center, Greenbelt, Maryland
5. NOAA/NCEP/Climate Prediction Center, College Park, Maryland
6. NOAA/OAR/Climate Program Office, Silver Spring, Maryland
7. NOAA/OAR/Climate Program Office, Silver Spring, Maryland, and NOAA/ESRL/Physical Sciences Division, Boulder, Colorado