1. Heidelberg Institute for Theoretical Studies (HITS); Heidelberg Germany
2. European Centre for Medium-Range Weather Forecasts (ECMWF); Reading UK
3. Physical Sciences Division; NOAA/ESRL; Boulder Colorado USA
4. College of Hydrology and Water Resources; Hohai University; Nanjing China
5. School of Geographical Sciences; University of Bristol; Bristol UK
6. Swiss Federal Institute for Forest; Snow and Landscape Research (WSL); Birmensdorf Switzerland