he Copernicus Marine Environment Monitoring Service (CMEMS) supplies information about

the physical state and variability of the global ocean and regional seas (von Schukmann et al.,

2020; Le Traon et al., 2017). CMEMS distributes remote sensing and in situ observations, and

short-term model forecasts in response to the needs of European public and private users. The

quality of the numerical models’ products from CMEMS is crucial because they are used, together

with observations, to detect and analyze environmental variability and trends (von Schuckmann

et al., 2020). In order to produce a better forecast of the ocean we need to increase our

understanding of 2-D and 3-D ocean circulation, dynamics and interactions at different scales,

namely the mesoscale (10–100 km) and fine scale (1–10 km).

The objective of this proposal is to evaluate the performance of the operational sub-kilometric IBI

system, as part of the task T.6.1.2 within WP6 of IMMERSE H2020 research project.