1. Barcelona Supercomputing Center, Barcelona, Spain;
2. Met Office, Exeter, United Kingdom;
3. Norwegian Meteorological Institute, Oslo, Norway;
4. Georges Lemaître Centre for Earth and Climate Research, Earth and Life Institute, Université Catholique de Louvain, Louvain-la-Neuve, Belgium;
5. European Centre for Medium-Range Weather Forecasts, Reading, United Kingdom;
6. Department of Meteorology, Stockholm University, Stockholm, Sweden;
7. CNRM, Université de Toulouse, Météo-France, CNRS, Toulouse, France;
8. Météo-France, Toulouse, France;
9. National Centre for Atmospheric Science, Department of Meteorology, University of Reading, Reading, United Kingdom;
10. Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Bremerhaven, Germany;
11. Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Bremerhaven, and Department of Physics and Electrical Engineering, University of Bremen, Bremen, Germany