1. Lancaster Environment Centre Lancaster University Lancaster UK
2. School of Earth and Environment University of Leeds Leeds UK
3. National Centre for Earth Observation University of Leeds Leeds UK
4. National Oceanic and Atmospheric Administration Boulder Colorado USA
5. Wolfson Atmospheric Chemistry Laboratories Department of Chemistry, University of York York UK
6. now at Eurofins Dr. Specht International GmbH Am Neuländer Gewerbepark 2 Hamburg
7. Scripps Institution of Oceanography, University of California San Diego CA USA
8. National Centre for Atmospheric Science School of Environmental Sciences, University of East Anglia Norwich UK
9. Kyungpook Institute of Oceanography Kyungpook National University Daegu South Korea
10. Rosenstiel School of Marine and Atmospheric Science University of Miami Miami FL USA
11. Deceased 19th December 2017
12. National Centre for Atmospheric Research Boulder CO USA
13. Nolan Sherry & Associates London UK
14. Laboratory for Air Pollution and Environmental Technology, Empa, Swiss Federal Laboratories for Materials Science and Technology Duebendorf Switzerland
15. Institute for Atmospheric and Environmental Sciences Goethe University Frankfurt Frankfurt Germany
16. Climate Science Centre, CSIRO Oceans and Atmosphere Aspendale Australia
17. Department of Pure and Applied Sciences University of Urbino Urbino Italy
18. National Institute for Environmental Studies Tsukuba Japan
19. Deceased 1st January 2020
20. School of Chemistry University of Bristol Bristol UK
21. Norwegian Institute for Air Research Kjeller Norway