1. Department of Earth, Atmospheric, and Planetary Science Massachusetts Institute of Technology Cambridge MA USA
2. Atmospheric Chemistry Observations and Modeling Laboratory National Center for Atmospheric Research Boulder CO USA
3. NASA Langley Research Center Hampton VA USA
4. Science Systems and Applications Hampton VA USA
5. School of Earth and Environment University of Leeds Leeds UK
6. Department of Chemistry University of Cambridge Cambridge UK
7. Department of Geography University of Cambridge Cambridge UK
8. National Centre for Atmospheric Science University of Leeds Leeds UK
9. Jet Propulsion Laboratory California Institute of Technology Pasadena CA USA
10. NOAA/ESRL Global Monitoring Division Boulder CO USA
11. Bureau of Meteorology Melbourne Victoria Australia
12. Australian Antarctic Division Hobart Tasmania Australia
13. Antarctic Climate and Ecosystems Cooperative Research Centre Hobart Tasmania Australia
14. Alfred Wegener Institute for Polar and Marine Research Bremerhaven Germany
15. Meteorological Instrument Center Japan Meteorological Agency Tsukuba Japan