The opponent is Dr. Birgit Wehner (remotely) from Leibniz Institute for Tropospheric Research and the custos is Prof. Tuukka Petäjä. The defense can be followed remotely on Zoom via the link https://helsinki.zoom.us/j/65811948133 (Webinar ID: 658 1194 8133). The electronic version of the dissertation will be available before the defense in the Helda digital repository (http://urn.fi/URN:ISBN:978-952-7276-79-2)