1. School of Environmental Sciences; University of East Anglia; Norwich UK
2. Facility for Airborne Atmospheric Measurements; Cranfield University; Cranfield UK
3. Department of Chemistry; University of York; York UK
4. Department of Meteorology; University of Reading; Reading UK
5. Department of Chemistry; University of California; Irvine California USA
6. Rosenstiel School of Marine and Atmospheric Science, Division of Marine and Atmospheric Chemistry; University of Miami; Miami Florida USA