Junjie Liu, NASA Jet Propulsion Laboratory, Pasadena, CA, United States, Jeongmin Yun, Jet Propulsion Laboratory, California Institute of Technology, Pasadena, United States, Sourish Basu, NOAA, Global Monitoring Laboratory, Boulder, United States, Frederic Chevallier, Institut Pierre Simon Laplace, LSCE, Gif-sur-Yvette Cedex, France, Matthew S Johnson, Earth Science Division, NASA Ames Research Center, Moffett Field, CA, United States, Fei Jiang, Nanjing University, Nanjing, China, Zhe Jin, Peking University, Beijing, China, Shamil S Maksyutov, NIES, Tsukuba, Japan, Kristan Morgan, Johns Hopkins University, Balitmore, United States, Scot Miller, Johns Hopkins University, Environmental Health and Engineering, Baltimore, United States and Sajeev Philip, Indian Institute of Technology Delhi, Centre for Atmospheric Sciences, New Delhi, India