1. GEOMAR Helmholtz Centre for Ocean Research Kiel, Kiel, Germany
2. Kiel University, Kiel, Germany
3. National Oceanography Centre (NOC), Southampton, UK
4. Ocean Frontier Institute, Dalhousie University, Halifax, Canada
5. Mercator Océan, Toulouse, France
6. European Centre for Medium-Range Weather Forecasts (ECMWF), Reading, UK