5490da33-8df5-4280-a980-e939a589dc8b English HELCOM Secretariat data@helcom.fi 2023-03-03T14:06:26 EPSG:3035 Bottom habitats not influenced by permanent anoxia 2016-2021 (HOLAS 3) 2023-02-14 https://metadata.helcom.fi/geonetwork/srv/eng/catalog.search#/metadata/5490da33-8df5-4280-a980-e939a589dc8b 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. HELCOM Secretariat data@helcom.fi Bio-geographical regions GEMET - INSPIRE themes, version 1.0 2008-06-01 geonetwork.thesaurus.external.theme.httpinspireeceuropaeutheme-theme oxygen deficiency GEMET 2018-08-16 geonetwork.thesaurus.external.theme.gemet-en MADS HOLAS3 ecosystem component deep water habitat 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: No limitations on public access. English environment oceans 7.530661 33.849351 52.45589 66.438436 ESRI Shapefile 1.0 https://maps.helcom.fi/website/MADS/download/?id=5490da33-8df5-4280-a980-e939a589dc8b WWW:LINK-1.0-http--link Download dataset https://maps.helcom.fi/website/mapservice/?datasetID=5490da33-8df5-4280-a980-e939a589dc8b WWW:LINK-1.0-http--link Open in Map Viewer https://www.io-warnemuende.de/msr-2016-0100.html WWW:LINK-1.0-http--link Original downloadable resource Commission Regulation (EU) No 1089/2010 of 23 November 2010 implementing Directive 2007/2/EC of the European Parliament and of the Council as regards interoperability of spatial data sets and services 2010-12-08 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.