1. Faculty of Science, RECETOX, Masaryk University, Brno 602 00, Czech Republic
2. Laboratory of Chemistry and Environment (LCE), CNRS, Aix-Marseille University, Marseille 13003, France
3. Spanish Research Council (CSIC), Institute of Environmental Assessment and Water Research (IDAEA), Barcelona 08034, Spain
4. Centre for Ocean and Atmospheric Sciences, University of East Anglia, Norwich NR4 7TJ, United Kingdom
5. Laboratory of Atmospheric Chemistry, Paul Scherrer Institute, Villigen 5232, Switzerland
6. GeoSphere Austria, Wien 1190, Austria
7. Centre for Environmental and Climate Research, Lund University, Lund 223 62, Sweden
8. Norwegian Institute for Air Research (NILU), Kjeller 2007, Norway
9. School of Natural Sciences and Centre for Climate and Air Pollution Studies, Ryan Institute, University of Galway, Galway H91 CF50, Ireland
10. DRD/GES Observatoire Pérenne de l’Environnement, ANDRA, Bure 55290, France
11. German Environment Agency (UBA), Zugspitze 82475 Germany
12. Institute of Environmental Protection, National Research Institute, Warsaw 02-170, Poland
13. National Centre of Scientific Research “Demokritos”, Institute of Nuclear Radiological Science Technology, Energy and Safety, ENRACT, Agia Paraskevi 15310, Greece
14. National Centre for Atmospheric Sciences, University of East Anglia, Norwich NR4 7TJ, United Kingdom
15. Bavarian Environment Agency, Augsburg 86179, Germany
16. Laboratoire d’Aérologie, CNRS/IRD, University of Toulouse, Toulouse 31400, France
17. Finnish Meteorological Institute, Helsinki 00560, Finland
18. Swiss Federal Laboratories for Materials Science and Technology (Empa), Dübendorf 8600, Switzerland
19. Atmospheric Chemistry Department, Leibniz Institute for Tropospheric Research (TROPOS), Leipzig 04318, Germany
20. National Atmospheric Observatory Košetice, KošeticeCzech Hydrometeorological Institute, Košetice 395 01, Czech Republic
21. Institute of Physics, University of Tartu, Tartu 50411, Estonia
22. Department of Physics, Lund University, Lund 223 63, Sweden
23. Institute for Atmospheric and Earth System Research (INAR), University of Helsinki, Helsinki 00100, Finland
24. Slovak Hydrometeorological Institute, Bratislava 833 15, Slovakia
25. Department of Chemistry, University of Crete, Heraklion 715 00, Greece
26. Environment Agency Austria, Wien 1090, Austria
27. Institute of Forestry and Engineering, Estonian University of Life Sciences, Tartu 51014, Estonia
28. Environmental Research Station Schneefernerhaus (UFS), Zugspitze 82475, Germany
29. UK Centre for Ecology and Hydrology, Penicuik EH260QB; United Kingdom
30. Géosciences Environnement Toulouse, CNRS/IRD, University of Toulouse, Toulouse 31400, France
31. Atmospheric Sounding Station El Arenosillo, National Institute for Aerospace Technology (INTA), Huelva 21130, Spain
32. National Institute for Public Health and the Environment (RIVM), Bilthoven 3721, MA, the Netherlands
33. Institut des Géoscience de l’Environnement, University Grenoble Alpes, Grenoble 38058, France
34. Multiphase Chemistry Department, Max Planck Institute for Chemistry, Mainz 55128, Germany