Xuemeng Chen will defend her doctoral dissertation 'Observational Investigations on Air Ions in the Lower Troposphere’ on April 13th at 12:00 in CK112 Exactum (Gustaf Hällströmin katu 2b).

The opponent will be Prof. Erik Swietlicki from Lund University and Prof. Veli-Matti Kerminen will serve as the custos.