affiliation not provided to SSRN, Institute of Environmental Assessment and Water Research (IDAEA-CSIC), affiliation not provided to SSRN, Institute of Environmental Assessment and Water Research (IDAEA-CSIC), Institute of Environmental Assessment and Water Research (IDAEA-CSIC), Institute of Environmental Assessment and Water Research (IDAEA-CSIC), University of Birmingham, Eötvös Lóránd University - Institute of Chemistry, affiliation not provided to SSRN, University of Granada, University of Granada, Empa Swiss Federal Laboratories for Materials Science and Technology, affiliation not provided to SSRN, CNRS-IRD-Collège de France UMR 34 CEREGE - Aix-Marseille Université, Agence régionale de surveillance de la qualité de l’air, National Observatory of Athens, National Observatory of Athens, Institute of Chemical Process Fundamentals of the CAS, Academy of Sciences of the Czech Republic - Laboratory of Aerosols Chemistry and Physics, Helsinki Region Environmental Services Authority, Helsinki Region Environmental Services Authority, Imperial College London - School of Public Health, Imperial College London, Environment and Health Administration, SLB-analys, Institute of Nuclear and Radiological Science and Technology, Institute of Nuclear and Radiological Science and Technology, CIEMAT - Department of Environment, CIEMAT - Department of Environment, German Environment Agency (UBA), Leibniz Institute for Tropospheric Research (TROPOS), Leibniz Institute for Tropospheric Research (TROPOS), Leibniz Institute for Tropospheric Research (TROPOS), Saxon State Office for Environment, Agriculture and Geology (LfULG), Laboratoire des Sciences du Climat et de l'Environnement (LSCE), Institut National de l'Environnement Industriel et des Risques (INERIS), University of Lille, affiliation not provided to SSRN, European Commission, Joint Research Centre (JRC), Ispra, Italy, European Commission, Joint Research Centre (JRC), Ispra, Italy, Government of the Republic of Finland - Finnish Meteorological Institute, University of Helsinki - Institute for Atmospheric and Earth System Research, affiliation not provided to SSRN, affiliation not provided to SSRN, affiliation not provided to SSRN, Laboratoire des Sciences du Climat et de l'Environnement (LSCE), Heinrich Heine University Düsseldorf, University of Rochester - School of Medicine and Dentistry, Institute of Environmental Assessment and Water Research (IDAEA-CSIC), University of Birmingham, University of Rochester, University of Helsinki - Institute for Atmospheric and Earth System Research, Institute of Environmental Assessment and Water Research (IDAEA-CSIC) and Institute of Environmental Assessment and Water Research (IDAEA-CSIC)

affiliation not provided to SSRN, affiliation not provided to SSRN, affiliation not provided to SSRN, Instituto de Ciencias del Mar, affiliation not provided to SSRN, affiliation not provided to SSRN, affiliation not provided to SSRN, affiliation not provided to SSRN, affiliation not provided to SSRN, affiliation not provided to SSRN, affiliation not provided to SSRN, University of Birmingham, University of Birmingham, affiliation not provided to SSRN, affiliation not provided to SSRN, Korea Polar Research Institute and affiliation not provided to SSRN

University of Birmingham, University of Leeds, University of Birmingham and University of Birmingham

Institute of Environmental Assessment and Water Research (IDAEA-CSIC), Institute of Environmental Assessment and Water Research (IDAEA-CSIC), Institute of Environmental Assessment and Water Research (IDAEA-CSIC), Institute of Environmental Assessment and Water Research (IDAEA-CSIC), Institute of Environmental Assessment and Water Research (IDAEA-CSIC), Institute of Environmental Assessment and Water Research (IDAEA-CSIC), University of Birmingham, Eötvös Lóránd University - Institute of Chemistry, affiliation not provided to SSRN, ELTE Eötvös Loránd University, Empa Swiss Federal Laboratories for Materials Science and Technology, National Observatory of Athens, National Observatory of Athens - Institute for Environmental Research and Sustainable Development, National Observatory of Athens, Institute of Chemical Process Fundamentals of the CAS, Academy of Sciences of the Czech Republic - Laboratory of Aerosols Chemistry and Physics, Helsinki Region Environmental Services Authority, Helsinki Region Environmental Services Authority, Imperial College London - School of Public Health, Imperial College London, Environment and Health Administration, SLB-analys, Institute of Nuclear and Radiological Science and Technology, Institute of Nuclear and Radiological Science and Technology, CIEMAT - Department of Environment, CIEMAT - Department of Environment, Leibniz Institute for Tropospheric Research (TROPOS), Leibniz Institute for Tropospheric Research (TROPOS), Leibniz Institute for Tropospheric Research (TROPOS), Saxon State Office for Environment, Agriculture and Geology (LfULG), Heinrich Heine University Düsseldorf, Laboratoire des Sciences du Climat et de l'Environnement (LSCE), Laboratoire des Sciences du Climat et de l'Environnement (LSCE), Institut National de l'Environnement Industriel et des Risques (INERIS), European Commission, Joint Research Centre (JRC), Ispra, Italy, European Commission, Joint Research Centre (JRC), Ispra, Italy, ISAC-CNR - Institute of Atmospheric Sciences and Climate of National Research Council, ISAC-CNR - Institute of Atmospheric Sciences and Climate of National Research Council, Government of the Republic of Finland - Finnish Meteorological Institute, University of Helsinki - Institute for Atmospheric and Earth System Research, University of Helsinki - Institute for Atmospheric and Earth System Research, Institute of Environmental Assessment and Water Research (IDAEA-CSIC), University of Rochester, University of Birmingham, Institute of Environmental Assessment and Water Research (IDAEA-CSIC) and Institute of Environmental Assessment and Water Research (IDAEA-CSIC)