1. School of Earth and EnvironmentUniversity of Leeds Leeds UK
2. Atmospheric Chemistry and Climate GroupInstitute of Physical Chemistry Rocasolano, CSIC Madrid Spain
3. National Centre for Earth Observation, Department of Physics and AstronomyUniversity of Leicester Leicester UK
4. Centre for Ocean and Atmospheric Sciences, School of Environmental SciencesUniversity of East Anglia Norwich UK
5. Now at Department of ChemistryUniversity of Leicester Leicester UK
6. Rosenstiel School of Marine and Atmospheric ScienceUniversity of Miami Miami Florida USA
7. National Ocean and Atmospheric Administration Boulder Colorado USA
8. National Centre for Atmospheric ScienceUniversity of Leeds Leeds UK
9. Scripps Institution of OceanographyUniversity of California San Diego California USA
10. Monitoring and Information Technology DepartmentNorwegian Institute for Air Research Kjeller Norway
11. Atmospheric Chemistry Research Group, School of ChemistryUniversity of Bristol Bristol UK
12. Swiss Federal Laboratories for Materials Science and Technology Dübendorf Switzerland
13. Oceans and Atmosphere FlagshipCSIRO Aspendale Victoria Australia
14. Department of Chemistry and BiochemistryOld Dominion University Norfolk Virginia USA