Mercator Ocean upgraded its ocean analysis and forecasting systems in 2010 to meet requirements for the GMES Marine service. A new 1/12 degree global system and 1/36 degree regional system for the northeast Atlantic were implemented. Product quality monitoring was improved through regular validation bulletins. A 17-year global ocean reanalysis at 1/4 degree resolution was also produced, incorporating more observations and model improvements. These system upgrades increased scientific performance and positioned Mercator Ocean as the coordinator of the MyOcean service.