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Belgian Navy, Ministry of Defence, Research Centre of the Belgian Navy, Mine Warfare Datacentre

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    EMODnet Chemistry aims to provide access to marine chemistry datasets and derived data products concerning eutrophication, acidity and contaminants. The importance of the selected substances and other parameters relates to the Marine Strategy Framework Directive (MSFD). This aggregated dataset contains all unrestricted EMODnet Chemistry data on eutrophication and acidity, and covers the Greater North Sea and Celtic Seas. Data were aggregated and quality controlled by 'Aarhus University, Department of Bioscience, Marine Ecology Roskilde' in Denmark. ITS-90 water temperature and water body salinity variables have also been included ('as are') to complete the eutrophication and acidity data. If you use these variables for calculations, please refer to SeaDataNet for the quality flags: Regional datasets concerning eutrophication and acidity are automatically harvested, and the resulting collections are aggregated and quality controlled using ODV Software and following a common methodology for all sea regions ( Parameter names are based on P35 vocabulary, which relates to EMODnet Chemistry aggregated parameter names and is available at: When not present in original data, water body nitrate plus nitrite was calculated by summing all nitrate and nitrite parameters. The same procedure was applied for water body dissolved inorganic nitrogen (DIN), which was calculated by summing all nitrate, nitrite, and ammonium parameters. Concentrations per unit mass were converted to a unit volume using a constant density of 1.25 kg/L. The aggregated dataset can also be downloaded as an ODV collection and spreadsheet, which is composed of a metadata header followed by tab separated values. This spreadsheet can be imported to ODV Software for visualisation (more information can be found at:

  • Since 2006, the Belgian Navy operates 5 Hydroid REMUS 100 Autonomous underwater vehicles. Four more were acquired in 2012 and 2016. 880 missions have been undertaken in various European countries for port protection and mine hunting operations, for which the sidescan sonar images are used,. This datset contains data from 455 missions (inland and testing missions excluded) from 2006 until 2019, mostly in Europe (Baltic, North and Mediterranean Sea) and contains ADCP, CTD, chlorophyll and turbidity data.