Sourish Basu, NASA Goddard Space Flight Center, Global Modeling and Assimilation Office, Greenbelt, MD, United States, Frédéric Chevallier, LSCE Laboratoire des Sciences du Climat et de l'Environnement, Gif-Sur-Yvette Cedex, France, Junjie Liu, Jet Propulsion Laboratory, Pasadena, CA, United States, Prabir Kumar Patra, Res. Inst. for Global Change, Yokohama, Japan, Susan Sund Kulawik, Bay Area Environmental Research Institute/NASA Ames Research Center, Mountain View, CA, United States and David Baker, NOAA, Boulder, United States