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Global Attributes:	id: no.niva:abf9ccdb-0c4a-4c69-945b-a64409028946 featureType: timeSeries title: Climate monitoring at Langtjern - buoy summary: This dataset contains water temperature and oxygen saturation measurements from sensors mounted on the buoy at Langtjern. The dataset is usually updated daily. Data has been through automatic quality control, and changes to previously published data may occur. About Langtjern: Climate change will lead to warming and changes in snowmelt and precipitation patterns. Such changes can affect lake ice cover and water temperatures, with possible consequences for fish and water-dwelling insects, food webs and oxygen availability. Also, greenhouse gas production, water color and acidity may be impacted. There are few lake ecosystems in Norway where such processes are studied in a comprehensive manner, while it is important both for research and policy to be able to study and document impacts of climate change on lakes. Therefore, NIVA initiated the establishment of a highly instrumented site for the study of climate impacts on lake processes. The existing long-term field site of Langtjern was chosen, which was established in the 1970s for monitoring of acid rain impacts on water quality and aquatic biology. Other research topics include mercury pollution effects, dissolved organic matter and production of greenhouse gases. title_no: Klimaovervåking ved Langtjern - bøye summary_no: Dette datasettet inneholder målinger av vanntemperatur og oksygenmetning fra sensorer montert på bøyen ved Langtjern. Datasettet oppdateres vanligvis daglig. Data har gjennomgått automatisk kvalitetskontroll, og endringer i tidligere publiserte data kan forekomme. Om Langtjern: Klimaendringer vil føre til oppvarming og endringer i snøsmelting og nedbørsmønstre. Slike endringer kan påvirke islegging og vanntemperatur i innsjøer, med mulige konsekvenser for fisk og vannlevende insekter, næringsnett og oksygentilgang. I tillegg kan produksjon av klimagasser, vannfarge og surhet bli påvirket. Det finnes få innsjøøkosystemer i Norge der slike prosesser studeres på en helhetlig måte, men det er viktig både for forskning og forvaltning å kunne studere og dokumentere klimaendringers effekt på innsjøer. NIVA har derfor etablert et høyinstrumentert feltanlegg for studier av klimaeffekter på innsjøprosesser. Det langsiktige feltanlegget Langtjern ble valgt, etablert på 1970-tallet for overvåking av sur nedbørs effekter på vannkvalitet og vannbiologi. Andre forskningstemaer inkluderer kvikksølvforurensning, løst organisk materiale og produksjon av klimagasser. date_created: 2026-04-15T08:58:26Z keywords: GCMDSK:EARTH SCIENCE > TERRESTRIAL HYDROSPHERE > SURFACE WATER > LAKES,GCMDLOC:CONTINENT > EUROPE > NORTHERN EUROPE > SCANDINAVIA > NORWAY,GEMET:Hydrography,NORTHEMES:Weather and climate keywords_vocabulary: GCMDSK:GCMD Science Keywords:https://gcmd.earthdata.nasa.gov/kms/concepts/concept_scheme/sciencekeywords,GCMDPLA:GCMD Platforms:https://gcmd.earthdata.nasa.gov/kms/concepts/concept_scheme/platforms,GCMDLOC:GCMD Locations:https://gcmd.earthdata.nasa.gov/kms/concepts/concept_scheme/locations,GEMET:INSPIRE Themes:http://inspire.ec.europa.eu/theme,NORTHEMES:GeoNorge Themes:https://register.geonorge.no/metadata-kodelister/nasjonal-temainndeling time_coverage_start: 2010-05-26T10:00:00Z geospatial_lat_min: 60.36983 geospatial_lat_max: 60.36983 geospatial_lon_min: 9.72997 geospatial_lon_max: 9.72997 spatial_representation: point project: Økofersk naming_authority: no.niva creator_type: institution creator_institution: Norwegian Institute for Water Research institution: Norwegian Institute for Water Research (NIVA) creator_email: heleen.de.wit@niva.no creator_url: https://niva.no creator_name: Norwegian Institute for Water Research data_owner: Norwegian Institute for Water Research processing_level: Operational Conventions: CF-1.7, ACDD-1.3 netcdf_version: 4 publisher_name: Norwegian Institute for Water Research publisher_institution: Norwegian Institute for Water Research publisher_email: miljoinformatikk@niva.no publisher_url: https://niva.no license: http://spdx.org/licenses/CC-BY-4.0(CC-BY-4.0) iso_topic_category: inlandWaters history: Built with dscreator collection: ADC THREDDSMetadata_services_opendap_service: https://thredds.niva.no/thredds/dodsC/datasets/loggers/langtjern-boye.nc

Variables:	longitude: 64 bit Real longitude standard_name: longitude long_name: longitude units: degree_east valid_min: -180.0 valid_max: 180.0 axis: X coordinate_reference_frame: urn:ogc:def:crs:EPSG::4326
	latitude: 64 bit Real latitude standard_name: latitude long_name: latitude units: degree_north valid_min: -90.0 valid_max: 90.0 axis: Y coordinate_reference_frame: urn:ogc:def:crs:EPSG::4326
	station_name: String station_name cf_role: timeseries_id coordinates: latitude longitude
	oxygensat_6m: Array of 64 bit Reals [time = 0..84819] time: _FillValue: NaN long_name: Oxygen Saturation at 6 m Depth units: % short_name: oxygen_saturation coordinates: latitude longitude _ChunkSizes: 512
	oxygensat_1m: Array of 64 bit Reals [time = 0..84819] time: long_name: Oxygen Saturation at 1 m Depth units: % short_name: oxygen_saturation coordinates: latitude longitude _FillValue: NaN _ChunkSizes: 512
	temp_0_5m: Array of 64 bit Reals [time = 0..84819] time: _FillValue: NaN long_name: Water Temperature at 0.5 m Depth units: degree_Celsius short_name: water_temperature coordinates: latitude longitude _ChunkSizes: 12
	temp_1_5m: Array of 64 bit Reals [time = 0..84819] time: _FillValue: NaN long_name: Water Temperature at 1.5 m Depth units: degree_Celsius short_name: water_temperature coordinates: latitude longitude _ChunkSizes: 12
	temp_1m: Array of 64 bit Reals [time = 0..84819] time: _FillValue: NaN long_name: Water Temperature at 1 m Depth units: degree_Celsius short_name: water_temperature coordinates: latitude longitude _ChunkSizes: 12
	temp_2m: Array of 64 bit Reals [time = 0..84819] time: _FillValue: NaN long_name: Water Temperature at 2 m Depth units: degree_Celsius short_name: water_temperature coordinates: latitude longitude _ChunkSizes: 12
	temp_3m: Array of 64 bit Reals [time = 0..84819] time: short_name: water_temperature coordinates: latitude longitude long_name: Water Temperature at 3 m Depth units: degree_Celsius _FillValue: NaN _ChunkSizes: 12
	temp_4m: Array of 64 bit Reals [time = 0..84819] time: _FillValue: NaN units: degree_Celsius long_name: Water Temperature at 4 m Depth short_name: water_temperature coordinates: latitude longitude _ChunkSizes: 12
	temp_6m: Array of 64 bit Reals [time = 0..84819] time: _FillValue: NaN long_name: Water Temperature at 6 m Depth units: degree_Celsius short_name: water_temperature coordinates: latitude longitude _ChunkSizes: 12
	temp_8m: Array of 64 bit Reals [time = 0..84819] time: short_name: water_temperature _FillValue: NaN long_name: Water Temperature at 8 m Depth units: degree_Celsius coordinates: latitude longitude _ChunkSizes: 12
	time: Array of 32 bit Integers [time = 0..84819] time: standard_name: time long_name: Time of measurement axis: T units: seconds since 1970-01-01 calendar: proleptic_gregorian _ChunkSizes: 12

For questions or comments about this dataset, contact the administrator of this server [Support] at: miljoinformatikk@niva.no

For questions or comments about the OPeNDAP service bundled with the TDS, email THREDDS support at: support-thredds@unidata.ucar.edu

DDS:

Dataset {
    Float64 longitude;
    Float64 latitude;
    String station_name;
    Float64 oxygensat_6m[time = 84820];
    Float64 oxygensat_1m[time = 84820];
    Float64 temp_0_5m[time = 84820];
    Float64 temp_1_5m[time = 84820];
    Float64 temp_1m[time = 84820];
    Float64 temp_2m[time = 84820];
    Float64 temp_3m[time = 84820];
    Float64 temp_4m[time = 84820];
    Float64 temp_6m[time = 84820];
    Float64 temp_8m[time = 84820];
    Int32 time[time = 84820];
} datasets/loggers/langtjern-boye.nc;

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