1. Laboratory for Air Pollution and Environmental Technology; Empa, Swiss Federal Laboratories for Materials Science and Technology; Dubendorf Switzerland
2. Scripps Institution of Oceanography; University of California, San Diego; La Jolla California USA
3. CSIRO Oceans and Atmosphere; Aspendale Victoria Australia
4. Atmospheric Chemistry Research Group, School of Chemistry; University of Bristol; Bristol UK
5. Earth System Research Laboratory; NOAA; Boulder Colorado USA
6. Cooperative Institute for Research in Environmental Sciences; University of Colorado Boulder; Boulder Colorado USA
7. Department of Pure and Applied Sciences; University of Urbino; Urbino Italy
8. Institute of Atmospheric Sciences and Climate; Italian National Research Council; Bologna Italy
9. Meteorological Observation Centre (MOC); China Meteorological Administration (CMA); Beijing China
10. Kyungpook Institute of Oceanography; Kyungpook National University; Daegu South Korea
11. JENSEN HUGHES; Baltimore Maryland USA
12. Norwegian Institute for Air Research; Kjeller Norway
13. Korea Polar Research Institute; KIOST; Incheon South Korea
14. School of Earth and Atmospheric Sciences; Georgia Institute of Technology; Atlanta Georgia USA
15. Chinese Academy of Meteorological Sciences (CAMS); China Meteorological Administration (CMA); Beijing China
16. Center for Ice and Climate, Niels Bohr Institute; University of Copenhagen; Copenhagen Denmark
17. Climate and Environmental Physics, Physics Institute and Oeschger Centre for Climate Change Research; University of Bern; Bern Switzerland
18. Center for Global Change Science; Massachusetts Institute of Technology; Cambridge Massachusetts USA