1. Department of Chemistry University of Cambridge Cambridge UK
2. Department of Geography University of Cambridge Cambridge UK
3. Atmospheric Chemistry Observations and Modeling Laboratory National Center for Atmospheric Research Boulder CO USA
4. Atmospheric Sciences and Global Change Division Pacific Northwest National Laboratory Richland WA USA
5. NCAS‐Climate University of Reading Reading UK
6. Department of Meteorology University of Reading Reading UK
7. National Centre for Earth Observation Reading UK
8. Met Office Exeter UK
9. School of Earth and Environment University of Leeds Leeds UK
10. Chemical Sciences Division NOAA Earth Systems Research Laboratory Boulder CO USA
11. Department of Earth, Atmospheric, and Planetary Sciences Massachusetts Institute of Technology Cambridge MA USA
12. Department of Atmospheric and Oceanic Sciences, Laboratory for Atmospheric and Space Physics University of Colorado Boulder CO USA