1. Alfred Wegener Institute, Bremerhaven, Germany
2. Institució Catalana de Recerca i Estudis Avançats (ICREA), Institut Català de Ciències del Clima (IC3), and Barcelona Supercomputing Center (BSC-CNS), Barcelona, Spain
3. Institut Català de Ciències del Clima (IC3), Barcelona, Spain, and Centre National de Recherches Météorologiques, Toulouse, France
4. Atmospheric Sciences Department, University of Washington, Seattle
5. MetOffice, Exeter, United Kingdom
6. Meteorological Institute, Stockholm University, Stockholm, Sweden
7. Tartu Observatory, Travere, Estonia
8. Max Planck Institute for Meteorology, Hamburg, Germany
9. Swedish Meteorological and Hydrological Institut, Norrkoeping, Sweden
10. NOAA/Pacific Marine Environmental Laboratory, Seattle; Washington
11. Geophysical Institute, University of Bergen, Bergen, Norway
12. Danish Meteorological Institute, Copenhagen, Denmark