1. Environmental Physics, Institute of Biogeochemistry and Pollutant Dynamics; ETH Zürich; Zürich; Switzerland
2. Institutes of Earth and Biosphere and Earth, Energy and Environment and School of Geography; University of Leeds; Leeds; UK
3. Program in Atmospheric and Oceanic Sciences; Princeton University; Princeton; New Jersey; USA
4. Marine Chemistry and Geochemistry; Woods Hole Oceanographic Institution; Woods Hole; Massachusetts; USA
5. Department of Earth, Atmosphere, and Planetary Sciences; Massachusetts Institute of Technology; Cambridge; Massachusetts; USA
6. Climate and Environmental Physics; Physics Institute, University of Bern; Bern; Switzerland
7. NOAA Earth System Research Laboratory; Global Monitoring Division; Boulder; Colorado; USA
8. Climate and Global Dynamics; National Center for Atmospheric Research; Boulder; Colorado; USA
9. Jet Propulsion Laboratory; California Institute of Technology; Pasadena; California; USA
10. Astrophysics and Geophysics Institute; University of Liege; Liege; Belgium
11. Lamont-Doherty Earth Observatory of Columbia University; Palisades; New York; USA