(2019-03-26) Leino, Katri; Lampilahti, Janne; Poutanen, Pyry; Väänänen, Riikka; Manninen, Antti; Buenrostro Mazon, Stephany; Dada, Lubna; Franck, Anna; Wimmer, Daniela; Aalto, Pasi P; Ahonen, Lauri; Enroth, Joonas; Kangasluoma, Juha; Keronen, Petri; Korhonen, Frans; Laakso, Heikki; Matilainen, Teemu; Siivola, Erkki; Manninen, Hanna E; Lehtipalo, Katrianne; Kerminen, Veli-Matti; Petäjä, Tuukka; Kulmala, Markku; Institute for Atmospheric and Earth System Research/Physics, Faculty of Science, P.O. Box 64, FI-00014 University of Helsinki, Finland - Leino, Katri; Institute for Atmospheric and Earth System Research/Physics, Faculty of Science, P.O. Box 64, FI-00014 University of Helsinki, Finland - Lampilahti, Janne; Institute for Atmospheric and Earth System Research/Physics, Faculty of Science, P.O. Box 64, FI-00014 University of Helsinki, Finland - Poutanen, Pyry; Institute for Atmospheric and Earth System Research/Physics, Faculty of Science, P.O. Box 64, FI-00014 University of Helsinki, Finland - Väänänen, Riikka; Institute for Atmospheric and Earth System Research/Physics, Faculty of Science, P.O. Box 64, FI-00014 University of Helsinki, Finland - Manninen, Antti; Institute for Atmospheric and Earth System Research/Physics, Faculty of Science, P.O. Box 64, FI-00014 University of Helsinki, Finland - Buenrostro Mazon, Stephany; Institute for Atmospheric and Earth System Research/Physics, Faculty of Science, P.O. Box 64, FI-00014 University of Helsinki, Finland - Dada, Lubna; Institute for Atmospheric and Earth System Research/Physics, Faculty of Science, P.O. Box 64, FI-00014 University of Helsinki, Finland - Franck, Anna; Institute for Atmospheric and Earth System Research/Physics, Faculty of Science, P.O. Box 64, FI-00014 University of Helsinki, Finland - Wimmer, Daniela; Institute for Atmospheric and Earth System Research/Physics, Faculty of Science, P.O. Box 64, FI-00014 University of Helsinki, Finland - Aalto, Pasi P; Institute for Atmospheric and Earth System Research/Physics, Faculty of Science, P.O. Box 64, FI-00014 University of Helsinki, Finland - Ahonen, Lauri; Institute for Atmospheric and Earth System Research/Physics, Faculty of Science, P.O. Box 64, FI-00014 University of Helsinki, Finland - Enroth, Joonas; Institute for Atmospheric and Earth System Research/Physics, Faculty of Science, P.O. Box 64, FI-00014 University of Helsinki, Finland - Kangasluoma, Juha; Institute for Atmospheric and Earth System Research/Physics, Faculty of Science, P.O. Box 64, FI-00014 University of Helsinki, Finland - Keronen, Petri; Institute for Atmospheric and Earth System Research/Physics, Faculty of Science, P.O. Box 64, FI-00014 University of Helsinki, Finland - Korhonen, Frans; Institute for Atmospheric and Earth System Research/Physics, Faculty of Science, P.O. Box 64, FI-00014 University of Helsinki, Finland - Laakso, Heikki; Institute for Atmospheric and Earth System Research/Physics, Faculty of Science, P.O. Box 64, FI-00014 University of Helsinki, Finland - Matilainen, Teemu; Institute for Atmospheric and Earth System Research/Physics, Faculty of Science, P.O. Box 64, FI-00014 University of Helsinki, Finland - Siivola, Erkki; CERN, CH-1211Geneva 23, Switzerland - Manninen, Hanna E; Institute for Atmospheric and Earth System Research/Physics, Faculty of Science, P.O. Box 64, FI-00014 University of Helsinki, Finland - Lehtipalo, Katrianne; Institute for Atmospheric and Earth System Research/Physics, Faculty of Science, P.O. Box 64, FI-00014 University of Helsinki, Finland - Kerminen, Veli-Matti; Institute for Atmospheric and Earth System Research/Physics, Faculty of Science, P.O. Box 64, FI-00014 University of Helsinki, Finland - Petäjä, Tuukka; Institute for Atmospheric and Earth System Research/Physics, Faculty of Science, P.O. Box 64, FI-00014 University of Helsinki, Finland - Kulmala, Markku