1. Atmospheric Chemistry and Dynamics Laboratory NASA Goddard Space Flight Center Greenbelt Maryland USA
2. Universities Space Research Association, GESTAR Columbia Maryland USA
3. National Centre for Earth Observation, School of Earth and Environment University of Leeds Leeds UK
4. Science Systems and Applications, Inc Lanham Maryland USA
5. National Centre for Atmospheric Science Leeds UK
6. Department of Chemistry University of Cambridge Cambridge UK
7. Karlsruhe Institute of Technology Karlsruhe Germany
8. Chemical Sciences Division NOAA Earth System Research Laboratory Boulder Colorado USA
9. Climate Science Centre CSIRO Oceans and Atmosphere Aspendale Vic Australia
10. Met Office Hadley Centre Exeter UK
11. National Center for Atmospheric Research Boulder Colorado USA
12. Global Monitoring Division NOAA Earth System Research Laboratory Boulder Colorado USA
13. National Institute of Water and Atmospheric Research Wellington New Zealand
14. School of Chemistry University of Bristol Bristol UK
15. Scripps Institution of Oceanography University of California, San Diego La Jolla California USA
16. National Institute of Standards and Technology Gaithersburg Maryland USA
17. Department of Physical and Chemical Sciences Università dell'Aquila L'Aquila Italy
18. Massachusetts Institute of Technology Cambridge Massachusetts USA
19. Institute for Atmospheric and Climate Science ETH Zurich Zurich Switzerland
20. Physikalisch‐Meteorologisches Observatorium Davos World Radiation Centre Davos Dorf Switzerland
21. National Institute for Public Health and the Environment Bilthoven Netherlands
22. Institute for Marine and Atmospheric Research Utrecht University Utrecht Netherlands