1. Earth System Science Interdisciplinary Center; University of Maryland; College Park Maryland USA
2. Global Modeling and Assimilation Office, National Aeronautics and Space Administration; Goddard Space Flight Center; Greenbelt Maryland USA
3. I. M. Systems Group; Goddard Earth Sciences Technology and Research; College Park Maryland USA
4. Cryospheric Science Laboratory, National Aeronautics and Space Administration; Goddard Space Flight Center; Greenbelt Maryland USA
5. Universities Space Research Association; Goddard Earth Sciences Technology and Research; Columbia Maryland USA
6. Joint Center for Earth Systems Technology; University of Maryland, Baltimore County; Baltimore Maryland USA
7. Climate and Radiation Laboratory, National Aeronautics and Space Administration; Goddard Space Flight Center; Greenbelt Maryland USA