1 Data information

This product displays the stations where anthracene has been measured and the values present in EMODnet Chemistry infrastructure are either above or below the limit of detection or quantification (LOD/LOQ), i.e for the substance, in that station, quality values found in EMODnet validated dataset can be equal to 6, Q or 1.

It is necessary to take into account that LOD/LOQ can change with time. These products aggregate data by station, producing only one final value for each station (above, below or above/below).

EMODnet Chemistry has included the gathering of contaminants data since the beginning of the project in 2009.

For the maps for EMODnet Chemistry Phase III, it was requested to plot data per matrix (water,sediment, biota), per biological entity and per chemical substance.

The series of relevant map products have been developed according to the criteria D8C1 of the MSFD Directive, specifically focusing on the requirements under the new Commission Decision 2017/848 (17th May 2017). The Commission Decision points to relevant threshold values that are specified in the WFD, as well as relating how these contaminants should be expressed (units and matrix etc.) through the related Directives i.e. Priority substances for Water. EU EQS Directive does not fix any threshold values in sediments. On the contrary Regional Sea Conventions provide some of them, and these values have been taken into account for the development of the visualization products.

To produce the maps the following process has been followed:

1. Data collection through SeaDataNet standards (CDI+ODV)
2. Harvesting, harmonization, validation and P01 code decomposition of data
3. SQL query on data sets from point 2
4. Production of map with each point representing at least one record that match the criteria.

The harmonization of all the data has been the most challenging task considering the heterogeneity of the data sources, sampling protocols.

Preliminary processing were necessary to harmonize all the data :

- For water: contaminants in the dissolved phase;
- For sediment: data on total sediment (regardless of size class) or size class < 2000 micro m
- For biota: contaminant data will focus on molluscs, on fish (only in the muscle), and on crustaceans
- Exclusion of data values equal to 0

1.1 Metadata

Access metadata from dataset’s landing page

2 Geographical extent

2.1 Coordinates

## [1] "West-Longitude: -7"
## [1] "South-Latitude: 46.2"
## [1] "East-Longitude: -0.5"
## [1] "North-Latitude: 50.1"

Add another dataset to dashboard for the defined geographical extent

2.2 Defined area

Map tiles by Stamen Design, under CC BY 3.0. Data by OpenStreetMap, under ODbL.

3 Anthracene: stations above/below LOQ/LOD

3.1 Access data

The Web Feature Service (WFS) of the EMODnet Chemistry portal allows collecting the data:
https://nodc.inogs.it/geoserver/Contaminants/wfs?service=WFS&request=GetCapabilities&version=1.1.0

Available labels:

##  [1] "FID"        "the_geom"   "OBJECTID"   "ID"         "Cruise"    
##  [6] "Station"    "Longitude"  "Latitude"   "EDMO_code"  "Bottom_dep"
## [11] "Instrument" "References" "Datum"      "Water_dept" "Depth_refe"
## [16] "Instrume_1" "Station_na" "Originator" "Project_na" "EDMED_refe"
## [21] "Access_res" "S27_prefla" "S27_altlab" "S26_prefla" "S25_prefla"


Download data for the defined geographical extent:

Excel file Geographic information
csv geojson

3.2 Map

3.3 Table

Browse table’s columns by using the left and right arrows. Turn the table’s pages with help of the previous/next buttons.

3.4 Map with id

3.5 Interactive map

Visualise and access data with Openlayer (click on the map)

4 Open-notebook

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This document produced by Marine-analyst.eu is licensed under CC BY-NC 4.0