1. Department of Chemistry, University of York, York, YO10 5DD, UK
2. National Centre for Atmospheric Science, University of York, YO10 5DD, York, UK
3. FAAM Airborne Laboratory, National Centre for Atmospheric Sciences, Cranfield University, Building 146, Central Avenue, Cranfield, Bedfordshire, MK43 0AL, UK
4. School of Earth and Environmental Sciences, University of Manchester, Manchester, M13 9PL, UK
5. NASA Jet Propulsion Laboratory: Pasadena, CA, USA
6. School of Chemistry, University of Leeds, Leeds, LS2 9JT, UK
7. National Centre for Atmospheric Science, University of Leeds, Leeds, LS2 9JT, UK
8. Universities Space Research Association, Columbia, MD, USA
9. NASA Goddard Space Flight Center, Greenbelt, MD, USA
10. Department of Earth Sciences, Royal Holloway, University of London, Egham, UK