AUTHOR=Le Traon Pierre Yves , Reppucci Antonio , Alvarez Fanjul Enrique , Aouf Lotfi , Behrens Arno , Belmonte Maria , Bentamy Abderrahim , Bertino Laurent , Brando Vittorio Ernesto , Kreiner Matilde Brandt , Benkiran Mounir , Carval Thierry , Ciliberti Stefania A. , Claustre Hervé , Clementi Emanuela , Coppini Giovanni , Cossarini Gianpiero , De Alfonso Alonso-Muñoyerro Marta , Delamarche Anne , Dibarboure Gerald , Dinessen Frode , Drevillon Marie , Drillet Yann , Faugere Yannice , Fernández Vicente , Fleming Andrew , Garcia-Hermosa M. Isabel , Sotillo Marcos García , Garric Gilles , Gasparin Florent , Giordan Cedric , Gehlen Marion , Gregoire Marilaure L. , Guinehut Stephanie , Hamon Mathieu , Harris Chris , Hernandez Fabrice , Hinkler Jørgen B. , Hoyer Jacob , Karvonen Juha , Kay Susan , King Robert , Lavergne Thomas , Lemieux-Dudon Benedicte , Lima Leonardo , Mao Chongyuan , Martin Matthew J. , Masina Simona , Melet Angelique , Buongiorno Nardelli Bruno , Nolan Glenn , Pascual Ananda , Pistoia Jenny , Palazov Atanas , Piolle Jean Francois , Pujol Marie Isabelle , Pequignet Anne Christine , Peneva Elisaveta , Pérez Gómez Begoña , Petit de la Villeon Loic , Pinardi Nadia , Pisano Andrea , Pouliquen Sylvie , Reid Rebecca , Remy Elisabeth , Santoleri Rosalia , Siddorn John , She Jun , Staneva Joanna , Stoffelen Ad , Tonani Marina , Vandenbulcke Luc , von Schuckmann Karina , Volpe Gianluca , Wettre Cecilie , Zacharioudaki Anna TITLE=From Observation to Information and Users: The Copernicus Marine Service Perspective JOURNAL=Frontiers in Marine Science VOLUME=6 YEAR=2019 URL=https://www.frontiersin.org/journals/marine-science/articles/10.3389/fmars.2019.00234 DOI=10.3389/fmars.2019.00234 ISSN=2296-7745 ABSTRACT=

The Copernicus Marine Environment Monitoring Service (CMEMS) provides regular and systematic reference information on the physical and biogeochemical ocean and sea-ice state for the global ocean and the European regional seas. CMEMS serves a wide range of users (more than 15,000 users are now registered to the service) and applications. Observations are a fundamental pillar of the CMEMS value-added chain that goes from observation to information and users. Observations are used by CMEMS Thematic Assembly Centres (TACs) to derive high-level data products and by CMEMS Monitoring and Forecasting Centres (MFCs) to validate and constrain their global and regional ocean analysis and forecasting systems. This paper presents an overview of CMEMS, its evolution, and how the value of in situ and satellite observations is increased through the generation of high-level products ready to be used by downstream applications and services. The complementary nature of satellite and in situ observations is highlighted. Long-term perspectives for the development of CMEMS are described and implications for the evolution of the in situ and satellite observing systems are outlined. Results from Observing System Evaluations (OSEs) and Observing System Simulation Experiments (OSSEs) illustrate the high dependencies of CMEMS systems on observations. Finally future CMEMS requirements for both satellite and in situ observations are detailed.