1. Environment and Climate Change Canada, Toronto, Ontario, Canada
2. University of Illinois at Urbana–Champaign, Urbana, Illinois
3. Met Office, Exeter, United Kingdom
4. University of Leeds, Leeds, United Kingdom
5. Bureau of Meteorology, Melbourne, Victoria, Australia
6. Stratton Park Engineering Corporation, Boulder, Colorado
7. University of Wyoming, Laramie, Wyoming
8. Massachusetts Institute of Technology, Cambridge, Massachusetts
9. National Center for Atmospheric Research, Boulder, Colorado
10. Max Planck Institute for Chemistry, Mainz, Germany
11. School of Earth and Environment, University of Manchester, Manchester, United Kingdom
12. National Centre for Atmospheric Science, University of Manchester, Manchester, United Kingdom
13. Institute for Atmospheric Physics, University of Mainz, Mainz, Germany
14. Forschungszentrum Jülich, Jülich, Germany
15. ETH Zurich, Institute for Atmospheric and Climate Science, Zurich, Switzerland
16. Karlsruhe Institute of Technology, Karlsruhe, Germany
17. University of Leipzig, Leipzig, Germany