1. Department of Meteorology; University of Reading; Reading UK
2. National Centre for Atmospheric Science, Department of Meteorology; University of Reading; Reading UK
3. Department of Physics; New Mexico Tech; Socorro New Mexico USA
4. Department of Environmental Sciences; Columbia University; New York New York USA
5. Department of Applied Physics and Applied Mathematics; Columbia University; New York New York USA
6. Department of Atmospheric Sciences; University of Washington; Seattle Washington USA
7. Climate Science Branch, NASA Langley Research Centre; Hampton Virginia USA
8. The Department of Physics; University of Auckland; Auckland New Zealand
9. Meteo France; Toulouse France
10. Royal Netherlands Meteorological Institute; De Bilt Netherlands
11. Delft University of Technology; Delft Netherlands