Chemistry

Data & products on marine water quality

Data Products

EMODnet Chemistry provides access to data products based on harmonized, standardized, validated datasets coming from all EU basins. Data products concern eutrophication, ocean acidification, contaminants and marine litter.

EMODnet Chemistry data products can be synthesized as follows:

Eutrophication

Gridded climatologies

These products display water body chlorophyll-a, dissolved oxygen, dissolved inorganic nitrogen (DIN), phosphate and silicate concentration. They are spatially interpolated maps produced as averages over a 6-year moving range at distinct depth layers. Maps can be customized selecting both depth and time ranges. An animation of the evolution over time of the parameters is also available.

Main characteristics are listed below:
Temporal coverage: 1980 - 2017;
Temporal resolution: seasonal;
Spatial resolution: 0.1 degree;
Depth coverage: -1000 - 0 m;
Unit: mg/m3 or umol/l;
Available to download as: NetCDF, PNG, PDF, EPS, SVG, WebM (animation), MP4 (animation), KML;
Web services: WMS, OPeNDAP

Eutrophication and Ocean Acidification

Spatial distribution and dynamic plots

As a first step, these products display location of sampling stations for a single parameter (e.g. water body pH) and give information on the number of observations. Maps can be customized selecting both depth and time ranges. As a second step, the data spatial distribution gives access to dynamic plots, time series or vertical profiles, by clicking on the dots representing the sampling stations. Users can easily customize the plots as well. These maps are available for many different parameters included in the macro categories: Acidity, Chlorophyll, Dissolved gases, Fertilisers, Organic matter, and Silicates.

Marine Litter

Spatial distribution, composition and abundance

Products for beach litter are divided in two macro categories, depending on the origin of data: official monitoring and other sources.

The maps allow users to visualize the following information:

  • Beaches locations and litter list used;
  • Number of surveys and temporal coverage;
  • Composition of litter according to material categories in percent;
  • Total litter abundance and specific litter group abundances.

Products for seafloor litter allow users to visualize the following information:

  • Survey locations and fishing gears used;
  • Composition of litter according to material categories in percent;
  • Total litter density and specific litter group densities.
For abundance and density maps an animation of the change over time is also available.

Main characteristics are listed below:
Temporal coverage of beach litter official monitoring: 2001-2018;
Temporal coverage of beach litter other sources: 2012-2017;
Temporal coverage of seafloor litter: 2006 to 2018;
Temporal resolution: annual;
Available to download as: Shapefile;
Web services: WFS

Contaminants

Spatial distribution and MSFD focused data evaluation

These products display location of sampling stations and contribute to the evaluation of data quality and adequacy for environmental quality assessment in seawater, biota and sediment. The maps are available for ten selected substances included in the macro categories: Antifoulants, Hydrocarbons, Heavy metals, Polychlorinated biphenyls, Pesticides and biocides.

These products allow users to visualize the following information:

  • Data below and above Limit of Quantification (LOQ);
  • Data with LOQ above or below 30 percent of EQSD threshold values;
  • Sampled matrix.

Main characteristics are listed below:
Temporal coverage: 1970 - 2017;
Temporal resolution: annual;
Available to download as: shapefile and PNG;
Web services: WMS, WFS

Map Viewer

Map Viewer allows users to browse, interact and visualize all maps. It gives access to the on-line visualization of the products. The HELP tab provides practical information about the characteristics and functionalities of the system.

Catalogue service

Browsing the product catalogue allows users to search for one or more available products as well as the related data collections. Users can also retrieve the full set of metadata, originators and distributors. The catalogue is integrated with the Map viewer, is compliant with ISO19139 metadata standards and fulfils INSPIRE Directive requirements.