[1] Indiana Univ, Dept Geog, Bloomington, IN 47405 USA
[2] Columbia Univ, Earth Inst, Ctr Climate Syst Res, New York, NY USA
[3] NASA, Goddard Inst Space Studies, New York, NY 10025 USA
[4] Univ Reading, Natl Ctr Earth Observ, Reading, Berks, England
[5] NASA, Goddard Space Flight Ctr, Global Modeling & Assimilat Off, Greenbelt, MD USA
[6] Sci Syst & Applicat Inc, Lanham, MD USA
[7] UCAR, Joint Ctr Satellite Data Assimilat, Boulder, CO USA