David F Baker, Colorado State University, CIRA, Fort Collins, United States, Sourish Basu, NASA Goddard Space Flight Center, Global Modeling and Assimilation Office, Greenbelt, United States; University of Maryland College Park, College Park, United States, Frederic Chevallier, Institut Pierre Simon Laplace, LSCE, Gif-sur-Yvette Cedex, France, Andrew R Jacobson, NOAA, Global Monitoring Laboratory, Boulder, United States, Fei Jiang, Nanjing University, Nanjing, China, Zhe Jin, Peking University, Beijing, China, Matthew S Johnson, Earth Science Division, NASA Ames Research Center, Moffett Field, CA, United States, Junjie Liu, Jet Propulsion Laboratory, California Institute of Technology, Pasadena, United States, Shamil S Maksyutov, NIES, Tsukuba, Japan, Scot Miller, Johns Hopkins University, Environmental Health and Engineering, Baltimore, United States, Kristan Morgan, Johns Hopkins University, Balitmore, United States and Sajeev Philip, Centre for Atmospheric Sciences, Indian Institute of Technology Delhi, New Delhi, India