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. As part of the Copernicus Marine Environment Monitoring Service(CMEMS), a physical–biogeochemical coupled model system has been developedto monitor and forecast the ocean dynamics and marine ecosystem of theEuropean waters and more specifically on the Iberia–Biscay–Ireland (IBI)area. The CMEMS IBI coupled model covers the north-east Atlantic Ocean fromthe Canary Islands to Iceland, including the North Sea and the westernMediterranean, with a NEMO-PISCES 1∕36 ∘ model application. Thecoupled system has been providing 7 d weekly ocean forecasts for CMEMS sinceApril 2018. Prior to its operational launch, a pre-operational qualificationsimulation (2010–2016) has allowed assessing the model's capacity toreproduce the main biogeochemical and ecosystem features of the IBI area.The objective of this paper is then to describe the consistency and skillassessment of the PISCES biogeochemical model using this 7-yearqualification simulation. The model results are compared with availablesatellite estimates as well as in situ observations (ICES, EMODnet and BGC-Argo). The simulation successfully reproduces the spatial distribution and seasonalcycles of oxygen, nutrients, chlorophyll  a and net primary production, andconfirms that PISCES is suitable at such a resolution and can be used foroperational analysis and forecast applications. This model system can be auseful tool to better understand the current state and changes in the marinebiogeochemistry of European waters and can also provide key variables fordeveloping indicators to monitor the health of marine ecosystems. Theseindicators may be of interest to scientists, policy makers, environmentalagencies and the general public.

Modelling the marine ecosystem of Iberia–Biscay–Ireland (IBI) European waters for CMEMS operational applications