HELCOM Metadata catalogue
Chlorophyll-a 2018
This core indicator evaluates the average chlorophyll-a concentration in surface water (0 – 10 m) during summer (June – September) during the assessment period 2011-2016. The measured average chlorophyll-a is a combined estimate of two types of data:
1) in-situ measurements from oceanographic monitoring data (surface water 0-10 m) and
2) earth observation data.
More detailed description on methodology can be found at
HELCOM Core indicator report and http://www.helcom.fi/Documents/Eutrophication%20assessment%20manual.pdf
This dataset displays the result of the indicator in HELCOM Assessment Scale 4 (Division of the Baltic Sea into 17 open sea sub-basins and division of coastal areas to WFD water types or water bodies). The open sea areas have been assessed based on HELCOM Monitoring data and earth observation data for year 2011 (ENVISAT/MERIS instrument observations with FUB bio-optical model). Results for coastal areas are based on national WFD results.
Attribute information:
"HELCOM_ID" = Code of the HELCOM scale 4 assessment unit
"Country" = Country/ Opensea
"level_2" = name of the subbasin
"level_4" = Name of the HELCOM scale 4 assessment unit
"Area (km2)" = Area of the HELCOM scale 4 assessment unit
"Indicator" = Name of indicator
“Season” = Season of the indicator (Summer = June-September)
“Period” = Assessment period (20112016 = 2011 – 2016)
Indicator value (ES) = Indicator value calculated for the assessment unit
"Standard deviation (STD)" = Standard deviation of data used for calculating ES
"Number of samples " = Number of samples by assessment unit
"Theshold value (ET)" = Commonly agreed thershold value
"Ratio between ES and ET (ER)" = Eutrophication ratio: Ratio between ES and ET (in case of indicator with positive response to eutrophication)
"ES_SCORE” = Confidence based on the data used for calculating ES
"ET_SCORE” = Confidence of target-setting procedure
"I_SCORE” = Confidence (%) = average of ES-Score and ET-Score
"Indicator Weight" = Indicator Weight in integrated eutrophication assessment
“Status” = Status of the indicator (“Good”, “Not good”, “Not assessed” or "Not applicable")
“Confidence” = Confidence of result based on I-SCORE (“High”, “Moderate” or “Low”)
"AULEVEL" = Assessment unit level used for the indicator
Simple
- Date (Publication)
- 2018-06-28
- Unique resource identifier
- https://metadata.helcom.fi/geonetwork/srv/eng/catalog.search#/metadata/efaf6c9b-1f57-4c4d-b268-dfed0b3907e4
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GEMET - INSPIRE themes, version 1.0
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Oceanographic geographical features
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- Keywords
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MADS
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HOLAS2 2018 Core indicator
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Core indicator
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- Use constraints
- Other restrictions
- Other constraints
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Use constraints: The data and resulting data products (tables, figures and maps) available on the indicator web page can be used freely given that the source is cited. The indicator should be cited as following: HELCOM (2018) Chlorophyll-a. 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
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- Environment
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- Begin date
- 2011-01-01
- End date
- 2016-12-31
- Unique resource identifier
- EPSG:3035
- Distribution format
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ESRI Shapefile
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1.0
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ESRI Shapefile
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1.0
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- 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
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The dataset was created in June 2018
Data source: The average chlorophyll-a was combined estimate of two types of data:
1) In-situ monitoring data provided by the HELCOM Contracting Parties, and kept in the HELCOM COMBINE
database, hosted by ICES (www.ices.dk), added with data from the Gulf of Finland year database, hosted by
the Finnish Environment Institute.
2) The original source of the satellite-based EO-chl-a dataset is calculated at SYKE using ENVISAT/MERIS
instrument data (2011). It has been validated by SYKE, and kept at the eutrophication assessment database
hosted by ICES. For the assessment period 2011-2016, data was available only during 2011.
3) FerryBox flow-through data is reported to ICES by Contracting Parties, to be included into the
eutrophication assessment database. It is reported according to the QA/QC guidance for FerryBox Flowthrough information, providing adequate metadata and quality information, including the following:
• (arithmetic and) geometric mean
• mode (most frequently occurring value in dataset)
• standard deviation
• percentiles (5,25, 50, 75, 95)
• N of observations that were used to derive statistics
Additional information:
http://www.helcom.fi/baltic-sea-trends/indicators/chlorophyll-a
- File identifier
- efaf6c9b-1f57-4c4d-b268-dfed0b3907e4 XML
- Metadata language
- English
- Character set
- UTF8
- Hierarchy level
- Dataset
- Date stamp
- 2021-09-24T12:50:28
Overviews
Spatial extent
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