HELCOM Metadata catalogue
Cyanobacterial bloom index HOLAS 3
This pre-core indicator evaluates the eutrophication status of the Baltic Sea area based on cyanobacterial bloom index. The index is calculated using two types of data: biomass data and Earth observation data. More detailed description on methodology can be found at HELCOM pre-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), but applicable only to certain open sea assessment units.
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 2 assessment unit
“Season” = Season of the indicator (Summer = June-September)
“Period” = Assessment unit period start and end year (20162021 = 2016 – 2021)
"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 (not applicable for cyanobacterial bloom index)
"Threshold value (ET)" = Commonly agreed threshold value
"Ratio between ES and ET (ER)" = 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 (“Achieve”, “Fail”, “Not assessed” or "Not applicable")
"AULEVEL" = Assessment unit level used for the indicator
"FID_12" =
"Indicator" = Indicator name
“CONFIDENCE” = Confidence of result based on I-SCORE (“High”, “Moderate”, “Low” or "Not assessed")
Simple
- Date (Creation)
- 2023-03-18
- Unique resource identifier
- https://metadata.helcom.fi/geonetwork/srv/eng/catalog.search#/metadata/72854fcb-4739-46db-a595-d120c27dda4f
-
GEMET - INSPIRE themes, version 1.0
-
-
Oceanographic geographical features
-
- Keywords
-
-
MADS
-
HOLAS3
-
Pre-Core indicator
-
- Use constraints
- Other restrictions
- Other constraints
-
Use constraints: Data can be used freely given that the source is cited (following creative commons license CC-BY). The source should be cited as: “HELCOM HOLAS 3 Dataset (2023)"
- Access constraints
- Other restrictions
- Other constraints
- Access constraints: No limitations on public access.
- Spatial representation type
- Vector
- Metadata language
- English
- Topic category
-
- Environment
))
- Begin date
- 2016-01-01 Unknown
- End date
- 2021-12-31 Now
- Unique resource identifier
- EPSG:3035
- Distribution format
-
-
ESRI Shapefile
(
1.0
)
-
ESRI Shapefile
(
1.0
)
- OnLine resource
- Download Cyanobacterial bloom index HOLAS 3 ( WWW:LINK-1.0-http--link )
- OnLine resource
- View Cyanobacterial bloom index HOLAS 3 ( WWW:LINK-1.0-http--link )
- Hierarchy level
- Dataset
Conformance result
- Date (Publication)
- 2010-12-08
- Statement
-
The remote sensing data source was the daily surface algae products of the Finnish Environment Institute
(SYKE) from the years 2003-2014 (operative version of the product can be found on
www.syke.fi/surfacealgalblooms), which are in turn based on the respective chlorophyll a and turbidity
products. The remote sensing data used in this study were produced with same methods as the operative
version but reprocessed in order to provide as harmonized data set as possible.
Chlorophyll a concentrations were derived for the MERIS observations using BEAM plug-in processor MERIS
Case-2 Water Properties Processor (FUB) according to Schroeder et al. (2007) and Schroeder et al. (2007a;
2007b). The MERIS turbidity estimations applied the BEAM plug-in processor Case 2 Regional (C2R; version
1.6.2) according to Doerffer and Schiller (2007). The use of this processor for MERIS data is supported also
by other studies conducted in the Baltic Sea by Kratzer et al. (2008), Beltrán-Abaunza et al. (2014) and Harvey
et al. (2015). The MODIS chlorophyll a and turbidity were derived according to Maritorena et al. (2002; 2010)
and O’Reilly et al. (1998; 2000). In the case of MODIS data, the algorithms for chlorophyll a and turbidity were
adjusted to the best performance when compared to in situ data (available monitoring programme
observations).
The cyanobacteria biomass was collected and analysed by the HELCOM PEG group.
Additional information:
http://www.helcom.fi/baltic-sea-trends/indicators/cyanobacterial-bloom-index
- File identifier
- 72854fcb-4739-46db-a595-d120c27dda4f XML
- Metadata language
- English
- Character set
- UTF8
- Hierarchy level
- Dataset
- Date stamp
- 2023-04-14T14:11:12
Overviews
Spatial extent
Provided by
