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Oceans

49 record(s)
 
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From 1 - 10 / 49
  • This dataset represents main data about the cores of Belgian boreholes that are stored by the Royal Belgian Institute of Natural Sciences. Data is distributed as shapefile with multiple meta-infomations such as unique borehole reference, depth, location, lithology and a link to access the core and lithological descriptions.

  • This dataset is part of the 2018 Belgian submission for the Marine Strategy Framework Directive (MSFD) linked to descriptor 5, criterion 1. This dataset contains the nutrient concentrations (ammonia, nitrate, nitrite, total nitrogen, phosphorus) measured on water samples taken in the BPNS between 2011 and 2016. The analysis of nutrients (N and P) is ensured by the national monitoring programme at ten sampling locations that are representative for the surrounding water masses. Based on all 2011-2016 results, the relationship with the salt content was calculated and, for each year, the value derived corresponding to a salt content of 33.5. The surface of the area where the nutrient concentrations exceed the respective thresholds was calculated on the basis of the relationship with the winter salt content and a climatology of the spatial distribution of the salt content (see annex D5 of the Belgian MSFD report). The resulting maps give a good overview of nutrient concentrations in the Belgian zone. In order to take into account the coastal-sea gradient and to illustrate the temporal trends in detail, the concentrations were also evaluated in three different areas of the BPNS: the coastal zone, the territorial zone and the open-sea zone. The long-term trends of nutrient concentrations in the three zones were assessed statistically.

  • This dataset is part of the 2018 Belgian submission for the Marine Strategy Framework Directive (MSFD) linked to descriptor 1, criterion 1. Stranded porpoises often show traces of incidental catch in fishing nets (bycatch), a major cause of death for this cetacean in the North Sea. Based on the number of stranded animals showing traces of bycatch, it can be estimated that up to a few dozen porpoises are caught per year. For extrapolation of bycatch data to effects at population level, reference is made to (future) initiatives at regional level.

  • This dataset is part of the 2018 Belgian submission for the Marine Strategy Framework Directive (MSFD) linked to descriptor 4, criterion 2. Three distinct datasets are published for this criterion.'Occurrence of breeding seabirds' describes the observation of eight seabird species (Common tern, Black-headed Gull, Herring Gull, Common Gull, Small Black-backed Gull, Yellow-legged gull, Big Stern and Little Stern) on the Belgian coast between 1992 and 2015. 'Density of seabirds' describes the density of seabirds (N birds/km) observed at large in the Belgian part of the North Sea between 1987 and 2016 (three surveys a year). Thirteen species are monitored and the evolution of each species density is shown as diagrams.'Occurrence of important benthic species' describes the results of Van Veen sampling campaigns performed between 2009 and 2014 in the Belgian part of the North Sea. Benthic species are counted and identified (e.g. Annelida, Echinodermata,..).

  • The Royal Decree of 22 May 2019 establishing a marine spatial plan defines 5 commercial and industrial zones: Zone A for commercial and industrial activities (Art. 23§1), Zone B for commercial and industrial activities (Art. 23§1), Zone C for commercial and industrial activities (Art. 23§1), Zone D for commercial and industrial activities (Art. 23§1), Zone E for commercial and industrial activities (Art. 23§1). Please refer to the Belgian official gazette (\"Moniteur belge/Belgisch Staatsblad\") for official reference information.

  • This dataset is part of the 2018 Belgian submission for the Marine Strategy Framework Directive (MSFD) linked to descriptor 6, criterion 5. It comprises three datasets used to assess the sea floor integrity for ensuring a proper functioning of the ecosystem.The dataset on the study of the fauna associated with cobble fields (hard substrates) describes the gravel analysis performed in the Belgian part of the North Sea between 2015 and 2017. Information on the location, date and procedure used for the sediment sampling is provided as well as the description of species found in the samples.The occurrence of important benthic species. The status of benthic habitats (soft substrates).

  • The Royal Decree of 22 May 2019 establishing a marine spatial plan defines 1 radar tower: Radar Oostdyck (Art. 21§3). Please refer to the Belgian official gazette (\"Moniteur belge/Belgisch Staatsblad\") for official reference information.

  • The Royal Decree of 22 May 2019 establishing a marine spatial plan defines 7 fishery management zones: Professional fisheries (Art. 13), Passive fisheries area (Noordhinder Noord) (Art. 14§4), Passive fisheries area (Noordhinder Zuid) (Art. 14§4), Passive fisheries (Fairybank) (Art. 14§4), Search area 1 for fisheries techniques (Art. 6§1), Search area 2 for fisheries techniques (Art. 6§1), Search area 3 for fisheries techniques (Art. 6§1). It replaces the 2014 Marine Spatial Plan, which is included for completeness. The Royal Decree of 20 March 2014 establishing a marine spatial plan defines in its Art. 6, six fisheries management areas: Regular regime, Art. 6 § 1; Fisheries management area 1, Art. 6 § 1.1°; Fisheries management area 2, Art. 6 § 1.2°; Fisheries management area 3, Art. 6 § 1.3°; Fisheries management area 4, Art. 6 § 1.4°; Fisheries management area 5, Art. 6 § 3. These zones are made available digitally in the resource described by this metadata document. Please refer to the Belgian official gazette (\"Moniteur belge/Belgisch Staatsblad\") for official reference information.

  • This dataset is part of the 2018 Belgian submission for the Marine Strategy Framework Directive (MSFD) linked to descriptor 5, criterion 2. This dataset contains the average of the 90th percentile chlorophyll a concentration during the growing season (march-october) in the Belgian part of the North Sea for the years 2011-2016. Chlorophyll a concentration (Chl) was generated from satellite daily data from ocean colour sensors. Data is supplied at approximately 1 km resolution on a geographical grid with equal spacing in longitude and latitude covering the described region.

  • This dataset is part of the 2018 Belgian submission for the Marine Strategy Framework Directive (MSFD) linked to descriptor 11, criterion 1. This dataset describes the impulsive noise generated during percussion pile emplacement for offshore wind farm construction and unexploded ordnance (UxO) explosions. Impulsive underwater sound (pressure) was measured during pile driving operations in Belgian waters, for different types of foundations (monopiles of different diameters, foundations of ducts with a smaller diameter) and hydraulic hammers with different energy powers. The results of measurements at Bligh Bank and Thornton Bank, with a resulting extrapolation of zero to peak noise level (Lz-p) at 750m and Sound Exposure Level (SEL) (no mitigation measures deployed), are presented (Norro et al., 2013).