Fenjuan Wang, Shamil Maksyutov, Rajesh Janardanan, NIES, Japan; Aki Tsuruta, Finnish Meteorological Institute, Finland; Akihiko Ito, Isamu Morino, Yukio Yoshida, NIES, Japan; Johannes W. Kaiser, Deutscher Wetterdienst, Germany; Greet Janssens Maenhout, European Commission Joint Research Centre, Italy; Ed Dlugokencky, NOAA, United States; Ivan Mammarella, University of Helsinki, Finland; Jost V. Lavric, Max Planck Institute for Biogeochemistry, Germany; Tsuneo Matsunaga, NIES, Japan