1. Centre for Atmospheric Science Department of Earth and Environmental Science University of Manchester Manchester UK
2. Now at School of Chemistry University of Bristol Bristol UK
3. Wolfson Atmospheric Chemistry Laboratories Department of Chemistry University of York York UK
4. Facility for Airborne Atmospheric Measurements FAAM 125 Cranfield University Cranfield UK
5. National Centre for Atmospheric Science University of York York UK
6. Department of Earth Sciences University of Oxford Oxford UK
7. School of GeoSciences University of Edinburgh Edinburgh UK
8. School of Geographical Sciences University of Bristol Bristol UK
9. Geological Survey of Zambia Ministry of Mines and Mineral Development Lusaka Zambia
10. Department of Earth Sciences Royal Holloway University of London Surrey UK
11. British Antarctic Survey Natural Environment Research Council Cambridge UK
12. Now at Environmental Defense Fund London UK
13. National Centre for Earth Observation University of Edinburgh Edinburgh UK
14. Battelle, National Ecological Observatory Network Boulder CO USA
15. Department of Atmospheric and Oceanic Sciences University of Wisconsin‐Madison Madison WI USA
16. National Centre for Earth Observation University of Leicester Leicester UK
17. Earth Observation Science School of Physics and Astronomy University of Leicester Leicester UK
18. Met Office Hadley Centre Joint Centre for Hydrometeorological Research Crowmarsh Gifford UK
19. Environmental Change Institute School of Geography and the Environment University of Oxford Oxford UK
20. Now at Centre for Environment and Agricultural Informatics Cranfield University Cranfield UK
21. SRON Netherlands Institute for Space Research Utrecht Netherlands