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Blue Cloud 2026: webinar on biogeochemical data quality control

19 June 2023

As part of the ongoing webinars organised by the Blue-Cloud 2026 Partnership, NODC described EMODnet Chemistry's approach to data quality control, duplicate checking and product generation this morning, Monday 19 June.
The Blue-Cloud 2026 project aims to develop a thematic marine extension of EOSC for open web-based science that meets the needs of the EU Blue Economy, Marine Environment and Marine Knowledge Agendas.
EMODnet Chemistry is the marine water quality data infrastructure of the European Marine Observation and Data Network: the long-term initiative to share HQ marine data funded by the EC Directorate- General for Maritime Affairs and Fisheries EC. The webinar was held jointly with IFREMER and HCMR.

The first part of the webinar focused on the data quality control process that EMODnet Chemistry uses to obtain standardised, harmonised and validated regional data collections on eutrophication and ocean acidification. EMODnet Chemistry collects data on nutrients, chlorophyll, oxygen and pH for all European ocean basins: the Mediterranean Sea, the Black Sea, the Arctic region, the Baltic Sea, the Greater North Sea and the Northeast Atlantic. This "quality control loop" involves data originators, data managers and regional sea coordinators, and relies on semi-automated quality controls as well as expert knowledge.

The second part of the presentation focused on the duplication check approach, an additional quality control step applied to identify and eliminate repetitive observations within the EMODnet Chemistry prior to the release and publication of the final regional data collections. Finally, speakers also described the methodology for producing gridded climatologies for eutrophication data at different spatial and temporal scales for the European seas.

Experts on 3 main data infrastructures, namely EMODnet Chemistry, Copernicus Marine Service and World Ocean Database, compared and discussed data access and metadata description as well as tools for duplicate analysis and quality control.

Watch the presentation from NODC.