1. Scripps Institution of Oceanography; University of California, San Diego; La Jolla California USA
2. Earth, Atmospheric, and Planetary Sciences; Massachusetts Institute of Technology; Cambridge Massachusetts USA
3. Empa, Swiss Federal Laboratories for Materials Science and Technology; Laboratory for Air Pollution and Environmental Technology; Dubendorf Switzerland
4. Centre for Australian Weather and Climate Research; CSIRO Marine and Atmospheric Research; Aspendale Victoria Australia
5. School of Earth and Atmospheric Sciences; Georgia Institute of Technology; Atlanta Georgia USA
6. Atmospheric Chemistry Research Group, School of Chemistry; University of Bristol; Bristol UK
7. Norwegian Institute for Air Research; Kjeller Norway
8. Korea Polar Research Institute; Incheon South Korea
9. Center for Global Change Science; Massachusetts Institute of Technology; Cambridge Massachusetts USA