1. ECMWF, Reading, UK
2. Japan Meteorological Agency, Tokyo, Japan
3. I.M. Systems Group, National Centers for Environmental Prediction, College Park, USA
4. Systems Research Group, National Centers for Environmental Prediction, College Park, USA
5. Met Office, Exeter, UK
6. CNRM UMR 3589, Météo‐France/CNRS, Toulouse, France
7. Global Modelling and Assimilation Office, GSFC, NASA, Greenbelt, USA
8. Deutscher Wetterdienst, Offenbach, Germany