• HELCOM Metadata catalogue
  •  
  •  
  •  

Radioactive substances Cesium-137 in seawater 2018

This core indicator evaluates the status of the marine environment based on concentrations of radioactive substances (Cs-137) in seawater and biota. Quantitative thresholds are used to evaluate if core indicators status is "Achieve", "Fail" or "Not assessed". Good status is achieved when concentrations reach levels measured before the Chernobyl accident in 1986.


This dataset displays the result of the indicator in HELCOM Assessment Scale 2 (Division of the Baltic Sea into 17 sub-basins) for seawater.


Attribute information:

"HELCOM_ID" = Code of the HELCOM scale 2 assessment unit

"level_2" = name of the HELCOM scale 2 assessment unit (subbasin)

"area_km2" = Area of HELCOM assessment unit

"Indicator" = name of the indicator

"Unit" = Unit used for the measured parameter

"Type" = type of the indicator

"Threshold value" = Threshold value for the subbasin

"Indicator value" = Indicator value (result) for the subbasin

"STATUS" = Status of the indicator in seawater (“Achieve”, “Fail” or “Not assessed”)

Simple

Date (Publication)
2018-06-28
Unique resource identifier
https://metadata.helcom.fi/geonetwork/srv/eng/catalog.search#/metadata/7fa49a39-02ac-4605-b06e-be515bdb247a
pointOfContact
  HELCOM Secretariat

GEMET - INSPIRE themes, version 1.0

  • Oceanographic geographical features

Keywords
  • MADS

  • HOLAS2 2018 Core indicator

  • Core indicator

Use constraints
Other restrictions
Other constraints

Use constraints: The data and resulting data products (tables, figures and maps) available on the indicator web pages can be used freely given that the source is cited. The indicator should be cited as following: HELCOM (2018) Radioactive substances: Cesium-137 in fish and surface water. HELCOM core indicator report. Online. [Date Viewed], [Web link].

Access constraints
Other restrictions
Other constraints
Access constraints: No limitations on public access.
Spatial representation type
Vector
Metadata language
English
Topic category
  • Environment
N
S
E
W
thumbnail


Begin date
2011-01-01
End date
2016-12-31
Unique resource identifier
EPSG:3035
Distribution format
  • ESRI Shapefile ( 1.0 )

OnLine resource
Download dataset ( WWW:LINK-1.0-http--link )
OnLine resource
Open in Map Viewer ( WWW:LINK-1.0-http--link )
Hierarchy level
Dataset

Conformance result

Date (Publication)
2010-12-08
Statement

The pre-Chernobyl values used to derive the threshold value have been calculated based on data in the HELCOM MORS database. The data used for defining the threshold value for 137Cs concentrations in herring, flatfish (plaice and flounder) and surface waters were collected between 1984 and 1985. The mean pre-Chernobyl 137Cs concentrations have been used as threshold values.

The evaluation of whether the threshold is achieved or not is carried out by calculating the mean value for all samples during the assessed year in each assessment unit and comparing this against the threshold values.


Data covers most of the Baltic Sea. Data of each matrix (herring, plaice and flounder and sea water) have been averaged by sub-basin and by year. The data is collected by national authorities and reported annually to the HELCOM MORS Database. In addition to national quality assurance procedures, manual quality assurance is applied to the reported data and data entries are verified annually by the HELCOM MORS Expert Group.


Additional information:

http://www.helcom.fi/baltic-sea-trends/indicators/radioactive-substances-cesium-137-in-fish-and-surface-seawater/


Link to metadata of dataset used for indicator calculation:

http://metadata.helcom.fi/geonetwork/srv/eng/catalog.search#/metadata/78d40993-eff7-4398-983d-dda8a2e45cbc

File identifier
7fa49a39-02ac-4605-b06e-be515bdb247a XML
Metadata language
English
Character set
UTF8
Hierarchy level
Dataset
Date stamp
2021-09-23T15:43:22
pointOfContact
  HELCOM Secretariat
 
 

Overviews

Spatial extent

N
S
E
W
thumbnail


Keywords

GEMET - INSPIRE themes, version 1.0
Oceanographic geographical features

Provided by

logo

Share on social sites

Access to the portal
Read here the full details and access to the data.

Associated resources

Not available


  •  
  •  
  •