1. NASA Goddard Institute for Space Studies, New York, and Department of Applied Physics and Applied Mathematics, Columbia University, New York, New York
2. NASA Goddard Institute for Space Studies, New York, and Center for Climate Systems Research, Columbia University, New York, New York
3. NASA Goddard Institute for Space Studies, New York, New York, and Department of Earth, Atmospheric and Planetary Sciences, Massachusetts Institute of Technology, Cambridge, Massachusetts
4. Nansen Environmental and Remote Sensing Center, Bjerknes Centre for Climate Research, Bergen, Norway