1. SRON Netherlands Institute for Space Research; Utrecht Netherlands
2. Institute for Marine and Atmospheric Research Utrecht; Utrecht Netherlands
3. CIRA; Colorado State University; Boulder Colorado USA
4. NOAA ESRL; Boulder Colorado USA
5. Department of Physics and Astronomy; University of Leicester; Leicester UK
6. Karlsruhe Institute of Technology; Karlsruhe Germany
7. Le Laboratoire des Sciences du Climat et l'Environnement; Gif-Sur-Yvette France
8. Department of Physics; University of Toronto; Toronto Ontario Canada
9. School of GeoSciences; University of Edinburgh; Edinburgh UK
10. Central Aerological Observatory; Dolgoprudny Russia
11. National Institute for Environmental Studies; Tsukuba Japan
12. Max Planck Institute for Biogeochemistry; Jena Germany
13. NASA Goddard Space Flight Center; Greenbelt Maryland USA
14. Goddard Earth Sciences Technology and Research (GESTAR); Columbia USA
15. Department of Atmospheric Science; Colorado State University; Fort Collins Colorado USA
16. Climmod; Orsay France