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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
pointOfContact
  HELCOM Secretariat

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
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Begin date
2016-01-01 Unknown
End date
2021-12-31 Now
Unique resource identifier
EPSG:3035
Distribution format
  • 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
pointOfContact
  HELCOM Secretariat
 
 

Overviews

Spatial extent

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S
E
W
thumbnail


Keywords

GEMET - INSPIRE themes, version 1.0
Oceanographic geographical features

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