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  <attribute name="title" value="Oslofjord Marine Water Chemistry 1990-2025 - Cleaned and Standardised Dataset" />
  <attribute name="title_no" value="Oslofjord marin vannkjemi 1990-2025 - renset og standardisert datasett" />
  <attribute name="summary" value="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." />
  <attribute name="summary_no" value="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." />
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  <attribute name="Conventions" value="CF-1.13, ACDD-1.3" />
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  <attribute name="creator_institution" value="Norwegian Institute for Water Research (NIVA)" />
  <attribute name="institution" value="Norwegian Institute for Water Research (NIVA)" />
  <attribute name="institution_short_name" value="NIVA" />
  <attribute name="creator_name" value="Areti Balkoni" />
  <attribute name="creator_email" value="areti.balkoni@niva.no" />
  <attribute name="creator_url" value="https://www.niva.no/en/employees/areti-balkoni" />
  <attribute name="data_owner" value="Norwegian Institute for Water Research (NIVA)" />
  <attribute name="processing_level" value="Harmonized and cleaned" />
  <attribute name="publisher_name" value="Norwegian Institute for Water Research (NIVA)" />
  <attribute name="publisher_email" value="miljoinformatikk@niva.no" />
  <attribute name="publisher_institution" value="Norwegian Institute for Water Research (NIVA)" />
  <attribute name="publisher_url" value="https://niva.no" />
  <attribute name="license" value="http://spdx.org/licenses/CC-BY-4.0(CC-BY-4.0)" />
  <attribute name="keywords" value="GCMDSK:EARTH SCIENCE &gt; OCEANS &gt; OCEAN CHEMISTRY &gt; NUTRIENTS, GCMDSK:EARTH SCIENCE &gt; OCEANS &gt; OCEAN OPTICS &gt; CHLOROPHYLL, GCMDSK:EARTH SCIENCE &gt; OCEANS &gt; SALINITY/DENSITY &gt; SALINITY, GCMDSK:EARTH SCIENCE &gt; OCEANS &gt; OCEAN TEMPERATURE &gt; WATER TEMPERATURE, GCMDLOC:OCEAN &gt; ATLANTIC OCEAN &gt; NORTH ATLANTIC OCEAN &gt; NORWEGIAN SEA, GCMDLOC:CONTINENT &gt; EUROPE &gt; NORWAY" />
  <attribute name="keywords_vocabulary" value="GCMDSK:GCMD Science Keywords, GCMDLOC:GCMD Locations" />
  <attribute name="date_created" value="2026-05-06T06:21:24Z" />
  <attribute name="history" value="Harmonized and cleaned from raw NIVA monitoring data using percentile-based filtering. Standardised to common variable names and units." />
  <attribute name="time_coverage_start" value="1990-01-08T00:00:00Z" />
  <attribute name="time_coverage_end" value="2025-12-07T00:00:00Z" />
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  <attribute name="collection" value="ADC" />
  <attribute name="_CoordSysBuilder" value="ucar.nc2.internal.dataset.conv.CF1Convention" />
  <dimension name="station" length="70" />
  <dimension name="profile" length="13088" />
  <dimension name="obs" length="74895" />
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    <group name="services">
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    <attribute name="geospatial_lat_min" value="58.17167" type="float" />
    <attribute name="geospatial_lon_max" value="11.36916" type="float" />
    <attribute name="geospatial_lat_max" value="59.90902" type="float" />
    <attribute name="geospatial_lon_units" value="degrees_east" />
    <attribute name="geospatial_lat_units" value="degrees_north" />
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    <attribute name="time_coverage_end" value="2024-11-27T00:00:00Z" />
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    <attribute name="time_coverage_duration" value="P0Y0M12742DT0H0M0.000S" />
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  <group name="NCISOMetadata">
    <attribute name="metadata_creation" value="2026-05-14" />
    <attribute name="nciso_version" value="2.4.8" />
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  <variable name="station_code" shape="station" type="String">
    <attribute name="long_name" value="Station Code" />
  </variable>
  <variable name="stationIndex" shape="profile" type="int">
    <attribute name="long_name" value="Index of station this profile belongs to" />
    <attribute name="instance_dimension" value="station" />
  </variable>
  <variable name="rowSize" shape="profile" type="int">
    <attribute name="long_name" value="Number of observations in this profile" />
    <attribute name="sample_dimension" value="obs" />
  </variable>
  <variable name="CDOM_abs_443_1perm" shape="obs" type="float">
    <attribute name="long_name" value="CDOM Absorption Coefficient at 443 nm" />
    <attribute name="standard_name" value="volume_absorption_coefficient_of_radiative_flux_in_sea_water_due_to_dissolved_organic_matter" />
    <attribute name="comment" value="Coloured dissolved organic matter absorption coefficient at 443 nm" />
    <attribute name="coordinates" value="time lat lon depth station_name" />
    <attribute name="units" value="m-1" />
  </variable>
  <variable name="Chl_a_ugperl" shape="obs" type="float">
    <attribute name="long_name" value="Chlorophyll-a Concentration" />
    <attribute name="coordinates" value="time lat lon depth station_name" />
    <attribute name="standard_name" value="mass_concentration_of_chlorophyll_a_in_sea_water" />
    <attribute name="units" value="ug L-1" />
  </variable>
  <variable name="DIN_ugperl" shape="obs" type="float">
    <attribute name="long_name" value="Dissolved Inorganic Nitrogen" />
    <attribute name="coordinates" value="time lat lon depth station_name" />
    <attribute name="standard_name" value="mole_concentration_of_dissolved_inorganic_nitrogen_in_sea_water" />
    <attribute name="units" value="ug L-1" />
    <attribute name="comment" value="Sum of nitrate-N, nitrite-N and ammonium-N" />
  </variable>
  <variable name="DIN_to_DIP" shape="obs" type="float">
    <attribute name="long_name" value="Dissolved Inorganic Nitrogen to Dissolved Inorganic Phosphorus Ratio" />
    <attribute name="coordinates" value="time lat lon depth station_name" />
    <attribute name="units" value="1" />
    <attribute name="comment" value="Molar ratio DIN:DIP" />
  </variable>
  <variable name="DOC_mgperl" shape="obs" type="float">
    <attribute name="long_name" value="Dissolved Organic Carbon" />
    <attribute name="coordinates" value="time lat lon depth station_name" />
    <attribute name="short_name" value="mass_concentration_of_dissolved_organic_carbon_in_sea_water" />
    <attribute name="units" value="mg L-1" />
  </variable>
  <variable name="DOC_to_DIN" shape="obs" type="float">
    <attribute name="long_name" value="Dissolved Organic Carbon to Dissolved Inorganic Nitrogen Ratio" />
    <attribute name="coordinates" value="time lat lon depth station_name" />
    <attribute name="units" value="1" />
  </variable>
  <variable name="DOC_to_TOTN" shape="obs" type="float">
    <attribute name="long_name" value="Dissolved Organic Carbon to Total Nitrogen Ratio" />
    <attribute name="coordinates" value="time lat lon depth station_name" />
    <attribute name="units" value="1" />
  </variable>
  <variable name="NH4_N_ugperl" shape="obs" type="float">
    <attribute name="long_name" value="Ammonium-N Concentration" />
    <attribute name="coordinates" value="time lat lon depth station_name" />
    <attribute name="standard_name" value="mole_concentration_of_ammonium_in_sea_water" />
    <attribute name="units" value="ug L-1" />
  </variable>
  <variable name="NO2_N_ugperl" shape="obs" type="float">
    <attribute name="long_name" value="Nitrite-N Concentration" />
    <attribute name="coordinates" value="time lat lon depth station_name" />
    <attribute name="standard_name" value="mole_concentration_of_nitrite_in_sea_water" />
    <attribute name="units" value="ug L-1" />
  </variable>
  <variable name="NO3_plus_NO2_N_ugperl" shape="obs" type="float">
    <attribute name="long_name" value="Nitrate plus Nitrite Nitrogen Concentration" />
    <attribute name="coordinates" value="time lat lon depth station_name" />
    <attribute name="units" value="ug L-1" />
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    <attribute name="long_name" value="Nitrate-N Concentration" />
    <attribute name="units" value="ug L-1" />
    <attribute name="standard_name" value="mole_concentration_of_nitrate_in_sea_water" />
    <attribute name="coordinates" value="time lat lon depth station_name" />
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    <attribute name="long_name" value="Phosphate-P Concentration" />
    <attribute name="units" value="ug L-1" />
    <attribute name="standard_name" value="mole_concentration_of_phosphate_in_sea_water" />
    <attribute name="coordinates" value="time lat lon depth station_name" />
  </variable>
  <variable name="SSS_PSU" shape="obs" type="float">
    <attribute name="long_name" value="Sea Water Practical Salinity" />
    <attribute name="comment" value="Reported in practical salinity units (PSU)" />
    <attribute name="standard_name" value="sea_water_practical_salinity" />
    <attribute name="coordinates" value="time lat lon depth station_name" />
    <attribute name="units" value="1" />
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  <variable name="SST_degC" shape="obs" type="float">
    <attribute name="long_name" value="Sea Water Temperature" />
    <attribute name="units_metadata" value="temperature: on_scale" />
    <attribute name="standard_name" value="sea_water_temperature" />
    <attribute name="units" value="degree_Celsius" />
    <attribute name="coordinates" value="time lat lon depth station_name" />
  </variable>
  <variable name="TOC_mgperl" shape="obs" type="float">
    <attribute name="long_name" value="Total Organic Carbon" />
    <attribute name="short_name" value="mass_concentration_of_organic_carbon_in_sea_water" />
    <attribute name="units" value="mg L-1" />
    <attribute name="coordinates" value="time lat lon depth station_name" />
  </variable>
  <variable name="TOTN_ugperl" shape="obs" type="float">
    <attribute name="long_name" value="Total Nitrogen" />
    <attribute name="short_name" value="mole_concentration_of_dissolved_inorganic_nitrogen_in_sea_water" />
    <attribute name="coordinates" value="time lat lon depth station_name" />
    <attribute name="units" value="ug L-1" />
  </variable>
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    <attribute name="long_name" value="Total Nitrogen to Total Phosphorus Ratio" />
    <attribute name="units" value="1" />
    <attribute name="coordinates" value="time lat lon depth station_name" />
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  <variable name="TOTP_ugperl" shape="obs" type="float">
    <attribute name="long_name" value="Total Phosphorus" />
    <attribute name="coordinates" value="time lat lon depth station_name" />
    <attribute name="units" value="ug L-1" />
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  <variable name="TSM_mgperl" shape="obs" type="float">
    <attribute name="long_name" value="Total Suspended Matter" />
    <attribute name="coordinates" value="time lat lon depth station_name" />
    <attribute name="standard_name" value="mass_concentration_of_suspended_matter_in_sea_water" />
    <attribute name="units" value="mg L-1" />
  </variable>
  <variable name="secchi_depth_m" shape="obs" type="float">
    <attribute name="long_name" value="Secchi Disk Depth" />
    <attribute name="coordinates" value="time lat lon depth station_name" />
    <attribute name="standard_name" value="secchi_depth_of_sea_water" />
    <attribute name="units" value="m" />
  </variable>
  <variable name="lat" shape="station" type="float">
    <attribute name="long_name" value="Station Latitude" />
    <attribute name="standard_name" value="latitude" />
    <attribute name="units" value="degrees_north" />
    <attribute name="_CoordinateAxisType" value="Lat" />
  </variable>
  <variable name="lon" shape="station" type="float">
    <attribute name="long_name" value="Station Longitude" />
    <attribute name="units" value="degrees_east" />
    <attribute name="standard_name" value="longitude" />
    <attribute name="_CoordinateAxisType" value="Lon" />
  </variable>
  <variable name="station_name" shape="station" type="String">
    <attribute name="long_name" value="Station Name" />
    <attribute name="cf_role" value="timeseries_id" />
  </variable>
  <variable name="time" shape="profile" type="int">
    <attribute name="long_name" value="Time of profile" />
    <attribute name="standard_name" value="time" />
    <attribute name="units" value="seconds since 1970-01-01 00:00:00" />
    <attribute name="calendar" value="standard" />
    <attribute name="_CoordinateAxisType" value="Time" />
  </variable>
  <variable name="depth" shape="obs" type="float">
    <attribute name="long_name" value="Depth of observation" />
    <attribute name="standard_name" value="depth" />
    <attribute name="units" value="m" />
    <attribute name="positive" value="down" />
    <attribute name="_CoordinateAxisType" value="Height" />
    <attribute name="_CoordinateZisPositive" value="down" />
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