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2021

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    The DTM is produced with Kongsberg multibeam echosounder survey, acquired in August 2021 by Marine Research Ltd. The resolution is 1/256 arc-minutes (~7.2m). It is located at Agigea, Romania, on the coastal region of the Black Sea. Depths are referenced to the Local Sea Level - Marea Neagra 1975 and the coordinates are expressed into the WGS84 reference frame.

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    The DTM is produced with Kongsberg multibeam echosounder survey, acquired in August 2021 by Marine Research Ltd. The resolution is 1/256 arc-minutes (~7.2m). It is located at Constanta Harbour, Romania, on the coastal region of the Black Sea. Depths are referenced to the Local Sea Level - Marea Neagra 1975 and the coordinates are expressed into the WGS84 reference frame.

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    EMODnet Chemistry aims to provide access to marine chemistry data sets and derived data products concerning eutrophication, acidity and contaminants. The chemicals chosen reflect importance to the Marine Strategy Framework Directive (MSFD). ITS-90 water temperature and Water body salinity variables have been also included (as-is) to complete the Eutrophication and Acidity data. If you use these variables for calculations, please refer to SeaDataNet for having the quality flags: https://www.seadatanet.org/Products/Aggregated-datasets . This aggregated dataset contains all unrestricted EMODnet Chemistry data on Eutrophication and Acidity (15 parameters with quality flag indicators), and covers the Mediterranean Sea with 187722 CDI records (180932 Vertical profiles and 6790 Time series). Vertical profiles temporal range is from 1911-08-17 to 2020-10-16. Time series temporal range is from 1974-06-04 to 2018-02-20. Data were aggregated and quality controlled by 'Hellenic Centre for Marine Research, Hellenic National Oceanographic Data Centre (HCMR/HNODC)' from Greece. Regional datasets concerning eutrophication and acidity are automatically harvested and resulting collections are aggregated and quality controlled using ODV Software and following a common methodology for all Sea Regions ( https://doi.org/10.6092/9f75ad8a-ca32-4a72-bf69-167119b2cc12). When not present in original data, Water body nitrate plus nitrite was calculated by summing up the Nitrates and Nitrites. Same procedure was applied for Water body dissolved inorganic nitrogen (DIN) which was calculated by summing up the Nitrates, Nitrites and Ammonium. Parameter names are based on P35, EMODnet Chemistry aggregated parameter names vocabulary, which is available at: https://www.bodc.ac.uk/resources/vocabularies/vocabulary_search/P35/. Detailed documentation is available at: https://dx.doi.org/10.6092/4e85717a-a2c9-454d-ba0d-30b89f742713 Explore and extract data at: https://emodnet-chemistry.webodv.awi.de/eutrophication%3EMediterranean The aggregated dataset can also be downloaded as ODV collection and spreadsheet, which is composed of metadata header followed by tab separated values. This spreadsheet can be imported to ODV Software for visualisation (More information can be found at: https://www.seadatanet.org/Software/ODV ). The original datasets can be searched and downloaded from EMODnet Chemistry Download Service: https://emodnet-chemistry.maris.nl/search

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    Description of measurements/samples, purpose for which they were collected, and the platforms/instrumentation and methods in collection RV Mallet 2019-2020 Legs Celtic Sea Cork 14m Globe DTM WGS 1984 projection Lowest Astronomical Tide (LAT). The GSI has been permitted to utilise the UKHO VORF (Vertical Offshore Reference Frame) sea surface model. This model allows the use of ‘GPS tides’ and the GSI has gridded this model to a 1km resolution around Ireland to 15km offshore for reducing all soundings to Lowest Astronomical Tide - LAT (VORF). By utilising ‘GPS tides’ there is no requirement to adjust for draft or squat as the water level is modelled over the seabed as measured to the WGS84 ellipsoid. This area was surveyed as part of the ongoing INFOMAR project (formerly Irish National Seabed Survey), a joint seabed mapping project between the Geological Survey Ireland and the Marine Institute. Survey work was conducted to standards and recommendations set out by INFOMAR, the International Hydrographic Organisation (IHO), the United Kingdom Hydrographic Office (UKHO) and the UK’s Maritime and Coastguard Agency (MCA). Please note the following: Data acquired prior to March 2011 were levelled to Lowest Astronomical Tide (LAT) using shifts derived from Proudman Oceanographic tidal model. Tidal height was derived using a network of offshore and onshore tide gauges. As such data are on average 0.54m deeper than the more recent UKHO Vertical Offshore Reference Frame (VORF) levelled data. We are currently updating the older datasets. Statement on the level of data processed and quality control, limitations on reliability INFOMAR bathymetry products generated to meet International Hydrographic Organization (IHO) standards to ensure gridded data positional accuracy in the horizontal (XY) and vertical (Z) frame. Arrangement of data Data has been processed and arranged into a GLOBE DTM grid using XYZ data. Spatial and temporal resolution of data within the dataset Image resolution is a 14m DTM grid. Length of time series Image created from data collected between 2019-07-17 and 2020-10-31 Amount of data expressed in number of stations, sites, observations, cores, months of recordings, miles of track or other units as appropriate Bathymetry image meets GLOBE DTM standard. Data provided under Creative Commons licence access and use conditions. Users of this data should provide the following attribution statement "Contains Irish Public Sector Data (INFOMAR, Geological Survey Ireland; Marine Institute) licensed under a Creative Commons Attribution 4.0 International (CC BY 4.0) licence"

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    Description of measurements/samples, purpose for which they were collected, and the platforms/instrumentation and methods in collection RV Celtic Explorer 2019 Leg 1 Celtic Sea North Cork 14m Globe DTM WGS 1984 projection Lowest Astronomical Tide (LAT). The GSI has been permitted to utilise the UKHO VORF (Vertical Offshore Reference Frame) sea surface model. This model allows the use of ‘GPS tides’ and the GSI has gridded this model to a 1km resolution around Ireland to 15km offshore for reducing all soundings to Lowest Astronomical Tide - LAT (VORF). By utilising ‘GPS tides’ there is no requirement to adjust for draft or squat as the water level is modelled over the seabed as measured to the WGS84 ellipsoid. This area was surveyed as part of the ongoing INFOMAR project (formerly Irish National Seabed Survey), a joint seabed mapping project between the Geological Survey Ireland and the Marine Institute. Survey work was conducted to standards and recommendations set out by INFOMAR, the International Hydrographic Organisation (IHO), the United Kingdom Hydrographic Office (UKHO) and the UK’s Maritime and Coastguard Agency (MCA). Please note the following: Data acquired prior to March 2011 were levelled to Lowest Astronomical Tide (LAT) using shifts derived from Proudman Oceanographic tidal model. Tidal height was derived using a network of offshore and onshore tide gauges. As such data are on average 0.54m deeper than the more recent UKHO Vertical Offshore Reference Frame (VORF) levelled data. We are currently updating the older datasets. Statement on the level of data processed and quality control, limitations on reliability INFOMAR bathymetry products generated to meet International Hydrographic Organization (IHO) standards to ensure gridded data positional accuracy in the horizontal (XY) and vertical (Z) frame. Arrangement of data Data has been processed and arranged into a GLOBE DTM grid using XYZ data. Spatial and temporal resolution of data within the dataset Image resolution is a 14m DTM grid. Length of time series Image created from data collected between 2019-09-21 and 2019-10-08 Amount of data expressed in number of stations, sites, observations, cores, months of recordings, miles of track or other units as appropriate Bathymetry image meets GLOBE DTM standard. Data provided under Creative Commons licence access and use conditions. Users of this data should provide the following attribution statement “Contains Irish Public Sector Data (Geological Survey Ireland; Marine Institute) licensed under a Creative Commons Attribution 4.0 International (CC BY 4.0) licence”

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    Description of measurements/samples, purpose for which they were collected, and the platforms/instrumentation and methods in collection RV Keary 2019 and 2020 legs Celtic Sea Cork 14m Globe DTM WGS 1984 projection Lowest Astronomical Tide (LAT). The GSI has been permitted to utilise the UKHO VORF (Vertical Offshore Reference Frame) sea surface model. This model allows the use of ‘GPS tides’ and the GSI has gridded this model to a 1km resolution around Ireland to 15km offshore for reducing all soundings to Lowest Astronomical Tide - LAT (VORF). By utilising ‘GPS tides’ there is no requirement to adjust for draft or squat as the water level is modelled over the seabed as measured to the WGS84 ellipsoid. This area was surveyed as part of the INFOMAR joint mapping project by the Geological Survey Ireland and the Marine Institute. Survey work was conducted to standards and recommendations set out by INFOMAR, the International Hydrographic Organisation (IHO), the United Kingdom Hydrographic Office (UKHO) and the UK’s Maritime and Coastguard Agency (MCA). Please note the following: Data acquired prior to March 2011 were levelled to Lowest Astronomical Tide (LAT) using shifts derived from Proudman Oceanographic tidal model. Tidal height was derived using a network of offshore and onshore tide gauges. As such data are on average 0.54m deeper than the more recent UKHO Vertical Offshore Reference Frame (VORF) levelled data. We are currently updating the older datasets. Statement on the level of data processed and quality control, limitations on reliability INFOMAR bathymetry products generated to meet International Hydrographic Organization (IHO) standards to ensure gridded data positional accuracy in the horizontal (XY) and vertical (Z) frame. Arrangement of data Data has been processed and arranged into a GLOBE DTM grid using XYZ data. Spatial and temporal resolution of data within the dataset Image resolution is a 14m DTM grid. Length of time series Image created from data collected between 2019-07 and 2020-10-17 Amount of data expressed in number of stations, sites, observations, cores, months of recordings, miles of track or other units as appropriate Bathymetry image meets GLOBE DTM standard. Data provided under Creative Commons licence access and use conditions. Users of this data should provide the following attribution statement "Contains Irish Public Sector Data (INFOMAR; Geological Survey Ireland; Marine Institute) licensed under a Creative Commons Attribution 4.0 International (CC BY 4.0) licence"

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    Description of measurements/samples, purpose for which they were collected, and the platforms/instrumentation and methods in collection RV Keary 2018 Leg 3 Irish Sea and St. George's Channel Anglesey Wales 14m Globe DTM WGS 1984 projection Lowest Astronomical Tide (LAT). The GSI has been permitted to utilise the UKHO VORF (Vertical Offshore Reference Frame) sea surface model. This model allows the use of ‘GPS tides’ and the GSI has gridded this model to a 1km resolution around Ireland to 15km offshore for reducing all soundings to Lowest Astronomical Tide - LAT (VORF). By utilising ‘GPS tides’ there is no requirement to adjust for draft or squat as the water level is modelled over the seabed as measured to the WGS84 ellipsoid. This area was surveyed as part of the ongoing CHERISH project by the Geological Survey Ireland. Survey work was conducted to standards and recommendations set out by INFOMAR, the International Hydrographic Organisation (IHO), the United Kingdom Hydrographic Office (UKHO) and the UK’s Maritime and Coastguard Agency (MCA). Please note the following: Data acquired prior to March 2011 were levelled to Lowest Astronomical Tide (LAT) using shifts derived from Proudman Oceanographic tidal model. Tidal height was derived using a network of offshore and onshore tide gauges. As such data are on average 0.54m deeper than the more recent UKHO Vertical Offshore Reference Frame (VORF) levelled data. We are currently updating the older datasets. Statement on the level of data processed and quality control, limitations on reliability INFOMAR bathymetry products generated to meet International Hydrographic Organization (IHO) standards to ensure gridded data positional accuracy in the horizontal (XY) and vertical (Z) frame. Arrangement of data Data has been processed and arranged into a GLOBE DTM grid using XYZ data. Spatial and temporal resolution of data within the dataset Image resolution is a 14m DTM grid. Length of time series Image created from data collected between 2018-06-26 and 2018-08-03 Amount of data expressed in number of stations, sites, observations, cores, months of recordings, miles of track or other units as appropriate Bathymetry image meets GLOBE DTM standard. Data provided under Creative Commons licence access and use conditions. Users of this data should provide the following attribution statement "Contains Irish Public Sector Data (CHERISH) licensed under a Creative Commons Attribution 4.0 International (CC BY 4.0) licence"

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    Description of measurements/samples, purpose for which they were collected, and the platforms/instrumentation and methods in collection GEO19_04 Celtic Sea Cork 14m Globe DTM WGS 1984 projection Lowest Astronomical Tide (LAT). The GSI has been permitted to utilise the UKHO VORF (Vertical Offshore Reference Frame) sea surface model. This model allows the use of ‘GPS tides’ and the GSI has gridded this model to a 1km resolution around Ireland to 15km offshore for reducing all soundings to Lowest Astronomical Tide - LAT (VORF). By utilising ‘GPS tides’ there is no requirement to adjust for draft or squat as the water level is modelled over the seabed as measured to the WGS84 ellipsoid. This area was surveyed as part of the ongoing INFOMAR project (formerly Irish National Seabed Survey), a joint seabed mapping project between the Geological Survey Ireland and the Marine Institute. Survey work was conducted to standards and recommendations set out by INFOMAR, the International Hydrographic Organisation (IHO), the United Kingdom Hydrographic Office (UKHO) and the UK’s Maritime and Coastguard Agency (MCA). Please note the following: Data acquired prior to March 2011 were levelled to Lowest Astronomical Tide (LAT) using shifts derived from Proudman Oceanographic tidal model. Tidal height was derived using a network of offshore and onshore tide gauges. As such data are on average 0.54m deeper than the more recent UKHO Vertical Offshore Reference Frame (VORF) levelled data. We are currently updating the older datasets. Statement on the level of data processed and quality control, limitations on reliability INFOMAR bathymetry products generated to meet International Hydrographic Organization (IHO) standards to ensure gridded data positional accuracy in the horizontal (XY) and vertical (Z) frame. Arrangement of data Data has been processed and arranged into a GLOBE DTM grid using XYZ data. Spatial and temporal resolution of data within the dataset Image resolution is a 14m DTM grid. Length of time series Image created from data collected between 2019-07-18 and 2019-08-20 Amount of data expressed in number of stations, sites, observations, cores, months of recordings, miles of track or other units as appropriate Bathymetry image meets GLOBE DTM standard. Data provided under Creative Commons licence access and use conditions. Users of this data should provide the following attribution statement "Contains Irish Public Sector Data (INFOMAR; Geological Survey Ireland; Marine Institute) licensed under a Creative Commons Attribution 4.0 International (CC BY 4.0) licence"

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    Description of measurements/samples, purpose for which they were collected, and the platforms/instrumentation and methods in collection GEO15_04 Irish Sea Drogheda 14m Globe DTM WGS 1984 projection Lowest Astronomical Tide (LAT). The GSI has been permitted to utilise the UKHO VORF (Vertical Offshore Reference Frame) sea surface model. This model allows the use of ‘GPS tides’ and the GSI has gridded this model to a 1km resolution around Ireland to 15km offshore for reducing all soundings to Lowest Astronomical Tide - LAT (VORF). By utilising ‘GPS tides’ there is no requirement to adjust for draft or squat as the water level is modelled over the seabed as measured to the WGS84 ellipsoid. This area was surveyed as part of the ongoing INFOMAR project (formerly Irish National Seabed Survey), a joint seabed mapping project between the Geological Survey Ireland and the Marine Institute. Survey work was conducted to standards and recommendations set out by INFOMAR, the International Hydrographic Organisation (IHO), the United Kingdom Hydrographic Office (UKHO) and the UK’s Maritime and Coastguard Agency (MCA). Please note the following: Data acquired prior to March 2011 were levelled to Lowest Astronomical Tide (LAT) using shifts derived from Proudman Oceanographic tidal model. Tidal height was derived using a network of offshore and onshore tide gauges. As such data are on average 0.54m deeper than the more recent UKHO Vertical Offshore Reference Frame (VORF) levelled data. We are currently updating the older datasets. Statement on the level of data processed and quality control, limitations on reliability INFOMAR bathymetry products generated to meet International Hydrographic Organization (IHO) standards to ensure gridded data positional accuracy in the horizontal (XY) and vertical (Z) frame. Arrangement of data Data has been processed and arranged into a GLOBE DTM grid using XYZ data. Spatial and temporal resolution of data within the dataset Image resolution is a 14m DTM grid. Length of time series Image created from data collected between 2015-10-01 and 2015-10-20 Amount of data expressed in number of stations, sites, observations, cores, months of recordings, miles of track or other units as appropriate Bathymetry image meets GLOBE DTM standard. Data provided under Creative Commons licence access and use conditions. Users of this data should provide the following attribution statement "Contains Irish Public Sector Data (Geological Survey Ireland; Marine Institute) licensed under a Creative Commons Attribution 4.0 International (CC BY 4.0) licence"