*AMM Olaf¹、VANHAMAKI Heikki¹、KAURISTIE Kirsti¹、STOLLE Claudia²、CHRISTIANSEN Freddy³、HAAGMANS Roger⁴、MASSON Arnaud⁵、TAYLOR Matt⁴、FLOBERGHAGEN Rune⁶、ESCOUBET Philippe⁴ (1.Finnish Meteorological Institute, Arctic Research Unit, Helsinki, Finland.、2.Helmholtz-Centre Potsdam, GFZ German Research Center for Geosciences, Germany、3.Technical University of Denmark, DTU Space, Lyngby, Denmark、4.ESTEC, Noordwijk, The Netherlands、5.ESAC, Madrid, Spain、6.Directorate of Earth Observation Programmes, ESRIN, Frascati, Italy)