Vilma Mannisenaho will defense her thesis “Modelling seasonal cycle and trends of atmospheric methane by utilizing isotopic observations, and insights of methane emissions” on Friday 31 May at 12, in Exactum CK112. She works in Finnish Meteorological Institute and her supervisors are Tuula Aalto and Aki Tsuruta. The opponent is Sourish Basu from Global Modeling and Assimilation Office, NASA Goddard Space Flight Center.