@prefix dcat: . @prefix dct: . @prefix foaf: . @prefix gsp: . @prefix locn: . @prefix owl: . @prefix schema: . @prefix vcard: . @prefix xsd: . a schema:DataDownload, schema:Dataset, dcat:Dataset, dcat:Distribution, foaf:Document ; dct:bibliographicCitation "Read the documentation, GEM terms of use and how to cite: https://data.g-e-m.dk/guides. Please get in touch with the GEM secretariat if you need help to cite correctly." ; dct:description "Eddy covariance flux measurements started in 2012. The mast (2 m high) is located about 100 m east of Arctic Station in a moist tundra site called Østerlien. It is a gentle south sloping area covered by low vegetation/dwarf shrubs. The system consist of a LICOR 7200 RS enclosed gas analyzer and a Gill HS-50 sonic anemometer. Data were logged at 20 Hz and fluxes processed on a 30 minute basis using EddyPro software. The time stamp refer to UTC-3. This data-set runs from September 2019 onwards. In September 2019 a SmartFlux System was installed to synchronize measured gas concentrations and anomometer data. At the same site (10 meter north of the eddy covariance mast) there is an automatic weather station AWS2. Data from AWS2 are found under Meteorology (AWS2-Meteorology) and under Soil (AWS2-GroundTemperatureP1, P2, AWS2-SoilMoisture, AWS2-SoilHeatFlux) and under Snow (AWS2-SnowDepth, AWS2-SnowTemperature)." ; dct:identifier "https://data.g-e-m.dk/datasets/10.17897/0D1B-2F33" ; dct:issued "2026-05-20T13:17:04.815831"^^xsd:dateTime, "2026-05-20T16:13:59.096372"^^xsd:dateTime ; dct:modified "2026-05-20T16:13:59.087271"^^xsd:dateTime, "2026-05-20T16:13:59.089824"^^xsd:dateTime ; dct:publisher [ a foaf:Agent ; foaf:homepage ; foaf:name "Greenland Ecosystem Monitoring" ], [ a foaf:Agent ; foaf:homepage ; foaf:name "Greenland Ecosystem Monitoring" ] ; dct:spatial [ a dct:Location ; locn:geometry "POLYGON ((-53.5141 69.2535, -53.5141 69.2535, -53.5141 69.2535, -53.5141 69.2535))"^^gsp:wktLiteral ] ; dct:temporal [ a dct:PeriodOfTime ; dcat:endDate "2023-12-14"^^xsd:date ; dcat:startDate "2019-09-06"^^xsd:date ], [ a dct:PeriodOfTime ; dcat:endDate "2023-12-14"^^xsd:date ; dcat:startDate "2019-09-06"^^xsd:date ] ; dct:title "Gas flux (EC1-Smart)" ; schema:about [ a schema:Thing ; schema:name "arctic-station" ] ; schema:citation "Read the documentation, GEM terms of use and how to cite: https://data.g-e-m.dk/guides. Please get in touch with the GEM secretariat if you need help to cite correctly." ; schema:creator [ a schema:Organization ; schema:contactPoint [ a schema:ContactPoint ; schema:contactType "customer service" ; schema:name "University of Copenhagen (UCPH - Partner 3)" ; schema:url "https://data.g-e-m.dk/datasets/10.17897/0D1B-2F33" ] ; schema:name "University of Copenhagen (UCPH - Partner 3)" ] ; schema:dateModified "2026-05-20T16:13:59.087271" ; schema:datePublished "2020-01-01", "2020-01-01T00:00:00" ; schema:description "Eddy covariance flux measurements started in 2012. The mast (2 m high) is located about 100 m east of Arctic Station in a moist tundra site called Østerlien. It is a gentle south sloping area covered by low vegetation/dwarf shrubs. The system consist of a LICOR 7200 RS enclosed gas analyzer and a Gill HS-50 sonic anemometer. Data were logged at 20 Hz and fluxes processed on a 30 minute basis using EddyPro software. The time stamp refer to UTC-3. This data-set runs from September 2019 onwards. In September 2019 a SmartFlux System was installed to synchronize measured gas concentrations and anomometer data. At the same site (10 meter north of the eddy covariance mast) there is an automatic weather station AWS2. Data from AWS2 are found under Meteorology (AWS2-Meteorology) and under Soil (AWS2-GroundTemperatureP1, P2, AWS2-SoilMoisture, AWS2-SoilHeatFlux) and under Snow (AWS2-SnowDepth, AWS2-SnowTemperature)." ; schema:distribution ; schema:identifier "https://data.g-e-m.dk/datasets/10.17897/0D1B-2F33" ; schema:keywords "ARCTIC", "ARCTIC TUNDRA", "CARBON FLUX", "CLIMATE INDICATORS", "ECOSYSTEMS", "GEOGRAPHY", "GREENLAND", "PHYSICAL GEOGRAPHY" ; schema:license "https://creativecommons.org/licenses/by-sa/4.0/" ; schema:name "Gas flux (EC1-Smart)" ; schema:publisher [ a schema:Organization ; schema:contactPoint [ a schema:ContactPoint ; schema:contactType "customer service" ; schema:name "Greenland Ecosystem Monitoring" ; schema:url "https://data.g-e-m.dk" ] ; schema:name "Greenland Ecosystem Monitoring" ] ; schema:spatialCoverage [ a schema:Place ; schema:geo [ a schema:GeoShape ; schema:polygon "{\"type\": \"Polygon\", \"coordinates\": [[[-53.514129638671875, 69.25348663330078], [-53.514129638671875, 69.25348663330078], [-53.514129638671875, 69.25348663330078], [-53.514129638671875, 69.25348663330078]]]}" ] ] ; schema:temporalCoverage "2019-09-06/2023-12-14" ; schema:url "https://data.g-e-m.dk/datasets/10.17897/0D1B-2F33" ; schema:variableMeasured [ a schema:PropertyValue ; schema:name "Date" ; schema:propertyID ; schema:unitText "YYYY-MM-DD" ; schema:url ], [ a schema:PropertyValue ; schema:description "UTC-3. Time stamp refer to the end of the 30 min averaging period" ; schema:name "Time" ; schema:propertyID ; schema:unitText "HH:MM" ; schema:url ], [ a schema:PropertyValue ; schema:description "30-minutes maximum wind speed" ; schema:name "WS_MAX_m_s-1" ; schema:propertyID ; schema:unitText "m s-1" ; schema:url ], [ a schema:PropertyValue ; schema:description "Latent heat flux" ; schema:name "LE_W_m-2" ; schema:propertyID ; schema:unitText "W m-2" ; schema:url ], [ a schema:PropertyValue ; schema:description "30-minutes average wind speed" ; schema:name "WS_m_s-1" ; schema:propertyID ; schema:unitText "m s-1" ; schema:url ], [ a schema:PropertyValue ; schema:description "CO2 flux" ; schema:name "FC_umol_m-2_s-1" ; schema:propertyID ; schema:unitText "µmol m-2 s-1" ; schema:url ], [ a schema:PropertyValue ; schema:description "Quality flag for CO2 gas flux: 0, 1, 2 (Mauder and Foken, 2004)" ; schema:name "FC_SSITC_TEST" ; schema:propertyID ; schema:url ], [ a schema:PropertyValue ; schema:description "Sensible heat flux" ; schema:name "H_W_m-2" ; schema:propertyID ; schema:unitText "W m-2" ; schema:url ], [ a schema:PropertyValue ; schema:description "Friction velocity" ; schema:name "USTAR_m_s-1" ; schema:propertyID ; schema:unitText "m s-1" ; schema:url ], [ a schema:PropertyValue ; schema:description "CO2-concentration (moles of gas per mole of dry air)" ; schema:name "CO2_MIXING_RATIO_umol_mol-1" ; schema:propertyID ; schema:unitText "µmol mol-1" ; schema:url ], [ a schema:PropertyValue ; schema:description "30-minutes average wind direction (true north)" ; schema:name "WD_deg" ; schema:propertyID ; schema:unitText "Deg" ; schema:url ], [ a schema:PropertyValue ; schema:description "H2O-concentration (moles of gas per mole of dry air)" ; schema:name "H2O_MIXING_RATIO_mmol_mol-1" ; schema:propertyID ; schema:unitText "mmol mol-1" ; schema:url ], [ a schema:PropertyValue ; schema:description "Quality flag for sensible heat flux: 0, 1, 2 (Mauder and Foken, 2004)" ; schema:name "H_SSITC_TEST" ; schema:propertyID ; schema:url ], [ a schema:PropertyValue ; schema:description "Quality flag for latent heat flux: 0, 1, 2 (Mauder and Foken, 2004)" ; schema:name "LE_SSITC_TEST" ; schema:propertyID ; schema:url ] ; schema:version "1" ; owl:versionInfo "1" ; dcat:accessURL ; dcat:contactPoint [ a vcard:Organization ; vcard:fn "[{\"author_name\": \"Greenland Ecosystem Monitoring\"}]" ] ; dcat:distribution ; dcat:keyword "ARCTIC", "ARCTIC TUNDRA", "CARBON FLUX", "CLIMATE INDICATORS", "ECOSYSTEMS", "GEOGRAPHY", "GREENLAND", "PHYSICAL GEOGRAPHY" ; dcat:landingPage ; dcat:theme "arctic-station" .