Mercator Ocean is the French Ocean Monitoring and Forecasting Centre. Owned by public institutions (CNRS, Ifremer, IRD, Météo-France, SHOM), Mercator Ocean is a non-profit company (Société Civile), based in Toulouse, employing a team of ~ 50 persons, entirely devoted to ocean monitoring and forecasting, and tasked by French authorities to take an active part in the Copernicus marine implementation and operation. Mercator Ocean delivers worldwide marine core services based on its high resolution global ocean and European seas capacity for real time monitoring and forecasting, its work on ocean multi-year reanalyses and the strong expertise of its oceanographers. Computer resources are dedicated for operational production of the oceanic forecasting systems and R&D activities including production of inter-annual simulations and reanalysis on Mercator Ocean own computing facility and on Météo-France supercomputing center. The computing capacity allows the use and the production of simulations with the global high resolution system developed by Mercator Océan which will be used in the context of the AtlantOS project. This complex system assimilates satellite and in situ observations to produce high resolution ocean states resolving large and meso scale ocean processes. Eddy-resolving ocean modelling, multi-data assimilation, product quality assessment, multi-year variability, expertise on physical ocean & ice, biogeochemistry, data management and core service to users are the main fields of expertise. Over the last 15 years, Mercator Ocean has been playing a leading role in operational oceanography at international level and European level, and is currently the coordinator of the EC/FP7 MyOcean project (Copernicus Marine Service). In AtlantOS, Mercator Ocean will contribute to WP1 (task 1.3) and will lead Task 7.4. Main activities will be on design (task 1.3) and impact (task 7.4) studies related to the different AtlantOS observing systems. These works will use MyOcean/Mercator Ocean global and Atlantic modelling and data assimilation systems (physics and biogeochemistry). Key personnels for Mercator Ocean include Y. Drillet and E. Remy. Y. Drillet is head of the Mercator Ocean R&D department. Dr. E. Remy is an expert in variational data assimilation and observation impact and design studies.
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