1. SRON Netherlands Institute for Space Research; Utrecht The Netherlands
2. Now at Laboratoire de Météorologie Dynamique/IPSL/CNRS/UPMC; 4 Place Jussieu F-75252 Paris France
3. IMK-ASF; Karlsruhe Institute of Technology; Eggenstein-Leopoldshafen Germany
4. Japanese Aerospace Exploration Agency (JAXA); Tsukuba Japan
5. National Institute for Environmental Studies; Tsukuba Japan
6. Jet Propulsion Laboratory; California Institute of Technology; Pasadena California USA
7. Institute of Environmental Physics; University of Bremen; Bremen Germany
8. School of Chemistry; University of Wollongong; Wollongong New South Wales Australia
9. Arctic Research Center; Finnish Meteorological Institute; Helsinki Finland
10. National Institute of Water and Atmospheric Research; Wellington New Zealand
11. IMK-IFU; Karlsruhe Institute of Technology; Garmisch-Partenkirchen Germany