74f29924-ae6d-4e75-b8f1-56710043ac86 English HELCOM Secretariat data@helcom.fi 2023-04-14T14:04:08 EPSG:3035 Input of impulsive anthropogenic sound HOLAS 3 2023-03-15 https://metadata.helcom.fi/geonetwork/srv/eng/catalog.search#/metadata/74f29924-ae6d-4e75-b8f1-56710043ac86 Input of impulsive anthropogenic sound includes impulsive events from 2016-2021 • Seismic surveys (HELCOM-OSPAR Registry; national data call submissions as lines in the folder of data) • Explosions (HELCOM-OSPAR Registry) • Pile driving (HELCOM-OSPAR Registry) • Airguns (HELCOM-OSPAR Registry) For the different event types, numeric intensity value was used to represent the pressure as categorized in HELCOM-OSPAR Impulsive noise registry. All nationally reported seismic surveys were given intensity values “Very low” (0.25) - Very low (0.25) - Low (0.5) - Medium (0.75) - High (1) The impact distance has not been taken into account due to the different nature of separate datasets used for the pressure layer. We acknowledge that e.g. pile driving and airguns may impact up to 20 km from the source event. The spread of the sound wave depends on the sound frequency, water salinity, temperature and density. HELCOM Secretariat data@helcom.fi Bio-geographical regions GEMET - INSPIRE themes, version 1.0 2008-06-01 geonetwork.thesaurus.external.theme.httpinspireeceuropaeutheme-theme noise pollution GEMET 2018-08-16 geonetwork.thesaurus.external.theme.gemet-en MADS HOLAS3 Pressure layer 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 7.5348 33.8582 52.5021 66.4302 2016-01-01 2021-12-31 ESRI Shapefile 1.0 https://maps.helcom.fi/website/MADS/download/?id=74f29924-ae6d-4e75-b8f1-56710043ac86 WWW:LINK-1.0-http--link Download Input of impulsive anthropogenic sound HOLAS 3 https://maps.helcom.fi/website/mapservice/?datasetID=74f29924-ae6d-4e75-b8f1-56710043ac86 WWW:LINK-1.0-http--link View Input of impulsive anthropogenic sound HOLAS 3 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 Data source: HELCOM-OSPAR Impulsive noise register. Data quality: The pressure is not coherent across the Baltic Sea, due to lacking reporting Attribute information: Normalised Pressure value Data converted directly to 1km grid cells Data from HELCOM-OSPAR Database for impulsive sound and national data call (polygons, points) with sound values categorized from very low, low, medium, high, and very high. Sum of all events calculated per 1x1 km grid cell. Normalized. Sum of events based on sound value codes. Values were normalized.