Bottom habitats not influenced by permanent anoxia 2016-2021 (HOLAS 3)
The availability of deep water habitat is based on the occurrence of H2S and describes the suitability of the bottom areas for the Baltic Sea biota, with regard to oxygen conditions of the near-bottom waters. The data used to produce the layer was provided by the Leibniz-Institut für Ostseeforschung Warnemünde (IOW) for the years 2016-2021.
Simple
- Date (Publication)
- 2023-02-14
- Unique resource identifier
- https://metadata.helcom.fi/geonetwork/srv/eng/catalog.search#/metadata/5490da33-8df5-4280-a980-e939a589dc8b
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GEMET - INSPIRE themes, version 1.0
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Bio-geographical regions
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GEMET
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oxygen deficiency
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- Keywords
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MADS
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HOLAS3
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ecosystem component
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deep water habitat
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- Use constraints
- Other restrictions
- Other constraints
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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
- Grid
- Metadata language
- English
- Topic category
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- Environment
- Oceans
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- 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 )
- OnLine resource
- Original downloadable resource ( WWW:LINK-1.0-http--link )
- Hierarchy level
- Dataset
Conformance result
- Date (Publication)
- 2010-12-08
- Statement
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The data used to produce the layer was provided by the Leibniz-Institut für Ostseeforschung Warnemünde (IOW) in 2022:
- areas (polygons) with hydrogen sulfide (H2S) based on point measurements and modeling. Five time periods/year, for years 2016-2021 (altogether 30 layers).
The polygons were converted to raster layers in a way that for each time period (6 years, 5 time periods each year), the areas with H2S got the value 0, while the other areas got the value 1. All layers were summed, (representing 6 years, 5 time periods each year, maximum value 30) and data was normalised. For more detailed information on the data used, please see Feistel et al. 2016.
Data source:
Polygon data on sulfidic areas was kindly provided by Leibniz-Institut für Ostseeforschung Warnemünde (IOW). Separate maps can be viewed at http://www.io-warnemuende.de/msr-2016-0100.html.
Reference:
Feistel, S., Feistel, R., Nehring, D., Matthhäus, W., Nausch, G., Nauman n, M., 2016: Hypoxic and anoxic regions in the Baltic Sea, 1969-2015. Meereswiss. Ber, Warnemünde, 100. doi:10.12754/msr-2016-0100
Data quality: The data is based on monitoring data and modeling. For further information, see reference.
- File identifier
- 5490da33-8df5-4280-a980-e939a589dc8b XML
- Metadata language
- English
- Character set
- UTF8
- Hierarchy level
- Dataset
- Date stamp
- 2023-03-03T14:06:26
Overviews
Spatial extent
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