no.niva:9a4f6a41-bf08-4ba3-8dbb-cf62f3544129 English utf8 Norwegian dataset service Areti Balkoni Norwegian Institute for Water Research (NIVA) areti.balkoni@niva.no https://www.niva.no/en/employees/areti-balkoni WWW:LINK web browser information pointOfContact 2026-05-14 ISO 19115:2003/19139 1.0 4 column 0.02517899222995924 row 0.02517899222995924 vertical 1.3352204448954523E-4 temporal 84122.0 area Oslofjord Marine Water Chemistry 1990-2025 - Cleaned and Standardised Dataset Oslofjord marin vannkjemi 1990-2025 - renset og standardisert datasett 2026-05-06T06:21:24Z creation no.niva Areti Balkoni Norwegian Institute for Water Research (NIVA) areti.balkoni@niva.no https://www.niva.no/en/employees/areti-balkoni WWW:LINK web browser information originator Long-term marine water chemistry monitoring at multiple stations in the Oslofjord region (Norway), spanning 1990-2025. Measurements include nutrients, organic carbon, chlorophyll-a, salinity, temperature, turbidity and Secchi depth at discrete depths (0-10 m) from fixed stations. Data have been harmonised and cleaned using percentile-based filtering. Langsiktige marine vannkjemiske målinger ved flere stasjoner i Oslofjordregionen (Norge), for perioden 1990-2025. Målingene inkluderer næringssalter, organisk karbon, klorofyll-a, salinitet, temperatur, turbiditet og siktdyp på diskrete dyp (0-10 m) fra faste stasjoner. Dataene er harmonisert og renset ved hjelp av persentilbasert filtrering. Areti Balkoni Norwegian Institute for Water Research (NIVA) areti.balkoni@niva.no https://www.niva.no/en/employees/areti-balkoni WWW:LINK web browser information originator Norwegian Institute for Water Research (NIVA) Norwegian Institute for Water Research (NIVA) miljoinformatikk@niva.no https://niva.no WWW:LINK web browser information publisher EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > NUTRIENTS theme OCEAN > ATLANTIC OCEAN > NORTH ATLANTIC OCEAN > NORWEGIAN SEA CONTINENT > EUROPE > NORWAY theme Norwegian Institute for Water Research (NIVA) dataCenter volume_absorption_coefficient_of_radiative_flux_in_sea_water_due_to_dissolved_organic_matter mass_concentration_of_chlorophyll_a_in_sea_water mole_concentration_of_dissolved_inorganic_nitrogen_in_sea_water mole_concentration_of_ammonium_in_sea_water mole_concentration_of_nitrite_in_sea_water mole_concentration_of_nitrate_in_sea_water mole_concentration_of_phosphate_in_sea_water sea_water_practical_salinity sea_water_temperature mass_concentration_of_suspended_matter_in_sea_water secchi_depth_of_sea_water latitude longitude time depth theme otherRestrictions CC-BY-4.0 AquaINFRA largerWorkCitation project eng oceans 1 8.06667 11.369158 58.17167 59.909018 seconds 1990-01-08T00:00:00Z 2024-11-27T00:00:00Z -0 -10 Oslofjord Marine Water Chemistry 1990-2025 - Cleaned and Standardised Dataset 2026-05-06T06:21:24Z creation Areti Balkoni Norwegian Institute for Water Research (NIVA) areti.balkoni@niva.no https://www.niva.no/en/employees/areti-balkoni WWW:LINK web browser information originator Long-term marine water chemistry monitoring at multiple stations in the Oslofjord region (Norway), spanning 1990-2025. Measurements include nutrients, organic carbon, chlorophyll-a, salinity, temperature, turbidity and Secchi depth at discrete depths (0-10 m) from fixed stations. Data have been harmonised and cleaned using percentile-based filtering. THREDDS OPeNDAP 1 8.06667 11.369158 58.17167 59.909018 1990-01-08T00:00:00Z 2024-11-27T00:00:00Z -0 -10 tight OPeNDAP Client Access https://thredds.niva.no/thredds/dodsC/datasets/samples/oslofjord_cleaned_standardized_data.nc OPeNDAP:OPeNDAP OPeNDAP THREDDS OPeNDAP download Oslofjord Marine Water Chemistry 1990-2025 - Cleaned and Standardised Dataset 2026-05-06T06:21:24Z creation Areti Balkoni Norwegian Institute for Water Research (NIVA) areti.balkoni@niva.no https://www.niva.no/en/employees/areti-balkoni WWW:LINK web browser information originator Long-term marine water chemistry monitoring at multiple stations in the Oslofjord region (Norway), spanning 1990-2025. Measurements include nutrients, organic carbon, chlorophyll-a, salinity, temperature, turbidity and Secchi depth at discrete depths (0-10 m) from fixed stations. Data have been harmonised and cleaned using percentile-based filtering. THREDDS HTTP Service 1 8.06667 11.369158 58.17167 59.909018 1990-01-08T00:00:00Z 2024-11-27T00:00:00Z -0 -10 tight FileHTTPService https://thredds.niva.no/thredds/fileServer/datasets/samples/oslofjord_cleaned_standardized_data.nc file THREDDS_HTTP_Service THREDDS HTTP Service download station_code String Station Code stationIndex int Index of station this profile belongs to rowSize int Number of observations in this profile CDOM_abs_443_1perm float CDOM Absorption Coefficient at 443 nm (volume_absorption_coefficient_of_radiative_flux_in_sea_water_due_to_dissolved_organic_matter) Chl_a_ugperl float Chlorophyll-a Concentration (mass_concentration_of_chlorophyll_a_in_sea_water) DIN_ugperl float Dissolved Inorganic Nitrogen (mole_concentration_of_dissolved_inorganic_nitrogen_in_sea_water) DIN_to_DIP float Dissolved Inorganic Nitrogen to Dissolved Inorganic Phosphorus Ratio DOC_mgperl float Dissolved Organic Carbon DOC_to_DIN float Dissolved Organic Carbon to Dissolved Inorganic Nitrogen Ratio DOC_to_TOTN float Dissolved Organic Carbon to Total Nitrogen Ratio NH4_N_ugperl float Ammonium-N Concentration (mole_concentration_of_ammonium_in_sea_water) NO2_N_ugperl float Nitrite-N Concentration (mole_concentration_of_nitrite_in_sea_water) NO3_plus_NO2_N_ugperl float Nitrate plus Nitrite Nitrogen Concentration NO3_N_ugperl float Nitrate-N Concentration (mole_concentration_of_nitrate_in_sea_water) PO4_P_ugperl float Phosphate-P Concentration (mole_concentration_of_phosphate_in_sea_water) SSS_PSU float Sea Water Practical Salinity (sea_water_practical_salinity) SST_degC float Sea Water Temperature (sea_water_temperature) TOC_mgperl float Total Organic Carbon TOTN_ugperl float Total Nitrogen TOTN_to_TOTP float Total Nitrogen to Total Phosphorus Ratio TOTP_ugperl float Total Phosphorus TSM_mgperl float Total Suspended Matter (mass_concentration_of_suspended_matter_in_sea_water) secchi_depth_m float Secchi Disk Depth (secchi_depth_of_sea_water) lat float Station Latitude (latitude) lon float Station Longitude (longitude) station_name String Station Name time int Time of profile (time) depth float Depth of observation (depth) Norwegian Institute for Water Research (NIVA) miljoinformatikk@niva.no https://niva.no WWW:LINK web browser URL for the data publisher This URL provides contact information for the publisher of this dataset information publisher OPeNDAP https://thredds.niva.no/thredds/dodsC/datasets/samples/oslofjord_cleaned_standardized_data.nc.html WWW:LINK File Information This URL provides a standard OPeNDAP html interface for selecting data from this dataset. download dataset Harmonized and cleaned from raw NIVA monitoring data using percentile-based filtering. Standardised to common variable names and units. This record was translated from NcML using ncml-to-iso.xsl version 1.0.0. (2026-05-14T07:26:31.424Z). ncml-to-iso.xsl was addapted from UnidataDD2MI.xsl V2.3.4 with inspiration from metno mmd stylesheets