@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 """Active layer is measured in the vicinity of the Automatic chambers in 'Rylekæret' in the Zackenberg valley. The reported active layer depths are in relation to the ground surface, the position of which changes over the season due to swelling and drying of the peat. Active layer is measured to the top of a metal rod that has been fixed in the permafrost. After the season the active layer in relation to the ground surface is computed based on relative levels between fix metal rods and the ground surface.\r Measurements were initiated in 2006. From 2006 - 2010 the active layer was only measured between chamber 1 and 2. In 2011 the active layer was also measured between chamber 5 and 6. From 2012 and onwards measurements have been conducted in the vicinity of each chamber at the site.\r No active layer measurements are published for 2014, due to poor data quality.""" ; dct:identifier "https://data.g-e-m.dk/datasets/10.17897/4QSZ-VN74" ; dct:issued "2026-05-20T13:19:13.838366"^^xsd:dateTime, "2026-05-20T16:14:49.516351"^^xsd:dateTime ; dct:modified "2026-05-20T16:14:49.507194"^^xsd:dateTime, "2026-05-20T16:14:49.509531"^^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 ((-20.5557 74.4791, -20.5557 74.4791, -20.5557 74.4791, -20.5557 74.4791))"^^gsp:wktLiteral ] ; dct:temporal [ a dct:PeriodOfTime ; dcat:endDate "2022-09-15"^^xsd:date ; dcat:startDate "2006-07-13"^^xsd:date ], [ a dct:PeriodOfTime ; dcat:endDate "2022-09-15"^^xsd:date ; dcat:startDate "2006-07-13"^^xsd:date ] ; dct:title "AC_Active_layer" ; schema:about [ a schema:Thing ; schema:name "zackenberg-research-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/10.17897/4QSZ-VN74" ] ; schema:name "University of Copenhagen (UCPH - Partner 3)" ] ; schema:dateModified "2026-05-20T16:14:49.507194" ; schema:datePublished "2020-01-01", "2020-01-01T00:00:00" ; schema:description """Active layer is measured in the vicinity of the Automatic chambers in 'Rylekæret' in the Zackenberg valley. The reported active layer depths are in relation to the ground surface, the position of which changes over the season due to swelling and drying of the peat. Active layer is measured to the top of a metal rod that has been fixed in the permafrost. After the season the active layer in relation to the ground surface is computed based on relative levels between fix metal rods and the ground surface.\r Measurements were initiated in 2006. From 2006 - 2010 the active layer was only measured between chamber 1 and 2. In 2011 the active layer was also measured between chamber 5 and 6. From 2012 and onwards measurements have been conducted in the vicinity of each chamber at the site.\r No active layer measurements are published for 2014, due to poor data quality.""" ; schema:distribution ; schema:identifier "https://data.g-e-m.dk/datasets/10.17897/4QSZ-VN74" ; schema:keywords "ARCTIC", "ARCTIC TUNDRA", "CLIMATE INDICATORS", "ECOSYSTEMS", "GEOGRAPHY", "GREENLAND", "PHYSICAL GEOGRAPHY", "SOILS" ; schema:license "https://creativecommons.org/licenses/by-sa/4.0/" ; schema:name "AC_Active_layer" ; 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\": [[[-20.555688858032227, 74.47914123535156], [-20.555688858032227, 74.47914123535156], [-20.555688858032227, 74.47914123535156], [-20.555688858032227, 74.47914123535156]]]}" ] ] ; schema:temporalCoverage "2006-07-13/2022-09-15" ; schema:url "https://data.g-e-m.dk/datasets/10.17897/4QSZ-VN74" ; schema:variableMeasured [ a schema:PropertyValue ; schema:description "Active layer measured between chamber 9 and 10 (see description of datasheet)" ; schema:name "Fix 9-10" ; schema:propertyID ; schema:unitText "Cm" ; schema:url ], [ a schema:PropertyValue ; schema:name "Date" ; schema:propertyID ; schema:unitText "YYYY-MM-DD" ; schema:url ], [ a schema:PropertyValue ; schema:name "Time" ; schema:propertyID ; schema:unitText "HH:MM" ; schema:url ], [ a schema:PropertyValue ; schema:description "Active layer measured between chamber 3 and 4 (see description of datasheet)" ; schema:name "Fix 3-4" ; schema:propertyID ; schema:unitText "Cm" ; schema:url ], [ a schema:PropertyValue ; schema:description "Active layer measured between chamber 5 and 6 (see description of datasheet)" ; schema:name "Fix 5-6" ; schema:propertyID ; schema:unitText "Cm" ; schema:url ], [ a schema:PropertyValue ; schema:description "Active layer measured near chamber 8 (see description of datasheet)" ; schema:name "Fix 8" ; schema:propertyID ; schema:unitText "Cm" ; schema:url ], [ a schema:PropertyValue ; schema:description "Active layer measured near chamber 7 (see description of datasheet)" ; schema:name "Fix 7" ; schema:propertyID ; schema:unitText "Cm" ; schema:url ], [ a schema:PropertyValue ; schema:description "Active layer measured near diver installed next to chamber 1 (see description of datasheet)" ; schema:name "Fix diver 1" ; schema:propertyID ; schema:unitText "Cm" ; schema:url ], [ a schema:PropertyValue ; schema:description "Active layer measured near diver installed next to chamber 6 (see description of datasheet)" ; schema:name "Fix diver 6" ; schema:propertyID ; schema:unitText "Cm" ; schema:url ], [ a schema:PropertyValue ; schema:description "Active layer measured between chamber 1 and 2 (see description of datasheet)" ; schema:name "Fix 1-2" ; schema:propertyID ; schema:unitText "Cm" ; 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", "CLIMATE INDICATORS", "ECOSYSTEMS", "GEOGRAPHY", "GREENLAND", "PHYSICAL GEOGRAPHY", "SOILS" ; dcat:landingPage ; dcat:theme "zackenberg-research-station" .