Aki Tsuruta defends her doctoral thesis "Application of the Ensemble Kalman filter in the estimation of global methane balance" on Thursday, 21 December 2017 at 12 o'clock in the Auditorium Brainstorm at the Finnish Meteorological Institute (Erik Palmenin aukio 1), Helsinki. The opponent is Dr. Shamil Maksyutov from National Institute for Environmental Studies. Published 13.12.2017