Department of Physics, University of Helsinki, P.O. Box 48, University of Helsinki, 00014, Helsinki, Finland

Institute of Meteorology and Climate Research, Atmospheric Environmental Research (IMK-IFU), Karlsruhe Institute of Technology, Garmisch-Partenkirchen, Germany

Institute of Meteorology and Climate Research, Atmospheric Environmental Research (IMK-IFU), Karlsruhe Institute of Technology, Garmisch-Partenkirchen, Germany

Institute of Meteorology and Climate Research, Atmospheric Environmental Research (IMK-IFU), Karlsruhe Institute of Technology, Garmisch-Partenkirchen, Germany

Department of Physics, University of Helsinki, P.O. Box 48, University of Helsinki, 00014, Helsinki, Finland

Finnish Meteorological Institute, P.O. Box 503, 00101, Helsinki, Finland

Finnish Meteorological Institute, P.O. Box 503, 00101, Helsinki, Finland

Department of Physics, University of Helsinki, P.O. Box 48, University of Helsinki, 00014, Helsinki, Finland

Department of Forest Ecology, University of Helsinki, P.O. Box 27, University of Helsinki, 00014, Helsinki, Finland

Finnish Forest Research Institute, Vantaa Unit, Finland

Institute of Meteorology and Climate Research, Atmospheric Environmental Research (IMK-IFU), Karlsruhe Institute of Technology, Garmisch-Partenkirchen, Germany

Meteorological Institute, Albert-Ludwigs-University Freiburg, Freiburg, Germany

Department of Physics, University of Helsinki, P.O. Box 48, University of Helsinki, 00014, Helsinki, Finland