1. California Institute of Technology, 1200 E. California Blvd, Mail code 210-41, Pasadena, CA 91125;
2. Naval Postgraduate School, Monterey, CA;
3. University of Washington, Seattle, WA;
4. NASA Ames Research Center, Moffett Field, CA;
5. Bay Area Environmental Research Institute, San Fransisco, CA;
6. SRI International, Menlo Park, CA, USA;
7. UK Meteorological Office, Beaufort Park, UK;
8. Stockholm University, Sweden;
9. Princeton University, Princeton, NJ, USA;
10. Joint Research Centre, Ispra, Italy