Cristina Miño, IOC/UNESCO, GOOS, Paris, France, Emma Heslop, IOC/UNESCO, GOOS, Paris Cedex 15, France, Bernadette Sloyan, Commonwealth Scientific and Industrial Research Organisation (CSIRO), Hobart, TAS, Australia, David M Legler, NOAA, Climate Observations, Silver Spring, MD, United States, Ann-Christine Zinkann, NOAA, Global Ocean Monitoring and Observing, Silver Spring, United States and Jun She, Danish Meteorological Institute, Copenhagen, Denmark