1. Norwegian Meteorological Institute Research Department Oslo Norway
2. Department of Geoscience University of Oslo Oslo Norway
3. Expert Analytics Oslo Norway
4. Laboratory of Environmental Chemistry Paul Scherrer Institute Villigen Switzerland
5. Oeschger Centre for Climate Change Research University of Bern Bern Switzerland
6. Department of Chemistry and Biochemistry University of Bern Bern Switzerland
7. Division of Hydrologic Sciences Desert Research Institute Reno NV USA
8. Department of Earth and Atmospheric Sciences University of Alberta Edmonton AB Canada
9. School of Earth and Climate Sciences University of Maine Orono ME USA
10. Climate Change Institute University of Maine Orono ME USA
11. Université Grenoble Alpes CNRS Institut des Géosciences de l’Environnement (IGE) Grenoble France
12. Laboratoire Interuniversitaire des Systèmes Atmosphériques Université de Paris and University Paris Est Creteil CNRS LISA France