Bottom oxygen concentrations are crucial indicators of hypoxia and ecosystem stress in the Baltic Sea, where restricted water exchange and stratification frequently lead to oxygen depletion at depth — conditions that can impact marine life and water quality. This animation depicts a forecast of bottom dissolved oxygen concentrations in the Baltic Sea, derived from daily integrated biogeochemical model output of the Copernicus Marine Environment Monitoring Service (CMEMS) Baltic Sea Monitoring and Forecasting Centre (BAL MFC) ERGOM/NEMO system — a coupled physical–biogeochemical model operated within CMEMS. The biogeochemical model ERGOM (Ecosystem model for the Baltic Sea) is one-way coupled to the 3D physical ocean model NEMO on the model's native grid at approximately 1 nautical mile

Note: The current visualization was produced within the PrimePrevention project as an initial demonstration product. It serves as a placeholder for future higher-resolution and higher-accuracy products under development within PrimePrevention that will integrate enhanced local observations and improved modelling techniques to provide more detailed and reliable assessments of biological hazards in the Baltic Sea.

Data source & contact: CMEMS BAL MFC ERGOM model output; contact servicedesk.cmems@mercator-ocean.eu.