@prefix dcat: <http://www.w3.org/ns/dcat#> .
@prefix dct: <http://purl.org/dc/terms/> .
@prefix foaf: <http://xmlns.com/foaf/0.1/> .
@prefix gsp: <http://www.opengis.net/ont/geosparql#> .
@prefix locn: <http://www.w3.org/ns/locn#> .
@prefix owl: <http://www.w3.org/2002/07/owl#> .
@prefix schema: <http://schema.org/> .
@prefix vcard: <http://www.w3.org/2006/vcard/ns#> .
@prefix xsd: <http://www.w3.org/2001/XMLSchema#> .

<https://data.g-e-m.dk/datasets/10.17897/2Q7S-2876> 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 on a welldrained white arctic bell-heather, just north of the Climate station. The site consist of 121 measuring points in a 100m x 100 m grid (11 almost N-S oriented rows each with 11 points). There are 10 m between every point. The grid nodes are numbered from 1-121. Active layer is measured manually using a metal rod. The dataset was iniated in 1996. Measurements are started as soon as the one point is free of snow in the grid. Measurements are repeated every week until all grid nodes are snow free, thereafter measurements are repeated every second week until the upper part of the soil starts to freeze." ;
    dct:identifier "https://data.g-e-m.dk/datasets/10.17897/2Q7S-2876" ;
    dct:issued "2026-05-20T13:20:34.138818"^^xsd:dateTime,
        "2026-05-20T16:15:20.400901"^^xsd:dateTime ;
    dct:modified "2026-05-20T16:15:20.391934"^^xsd:dateTime,
        "2026-05-20T16:15:20.394836"^^xsd:dateTime ;
    dct:publisher [ a foaf:Agent ;
            foaf:homepage <https://data.g-e-m.dk> ;
            foaf:name "Greenland Ecosystem Monitoring" ],
        [ a foaf:Agent ;
            foaf:homepage <https://data.g-e-m.dk> ;
            foaf:name "Greenland Ecosystem Monitoring" ] ;
    dct:spatial [ a dct:Location ;
            locn:geometry "POLYGON ((-20.5700 74.4700, -20.5700 74.4700, -20.5700 74.4700, -20.5700 74.4700))"^^gsp:wktLiteral ] ;
    dct:temporal [ a dct:PeriodOfTime ;
            dcat:endDate "2024-09-05"^^xsd:date ;
            dcat:startDate "1996-06-22"^^xsd:date ],
        [ a dct:PeriodOfTime ;
            dcat:endDate "2024-09-05"^^xsd:date ;
            dcat:startDate "1996-06-22"^^xsd:date ] ;
    dct:title "ZEROCALM-1_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/10.17897/2Q7S-2876" ] ;
            schema:name "University of Copenhagen (UCPH - Partner 3)" ] ;
    schema:dateModified "2026-05-20T16:15:20.391934" ;
    schema:datePublished "2020-01-01",
        "2020-01-01T00:00:00" ;
    schema:description "Active layer is measured on a welldrained white arctic bell-heather, just north of the Climate station. The site consist of 121 measuring points in a 100m x 100 m grid (11 almost N-S oriented rows each with 11 points). There are 10 m between every point. The grid nodes are numbered from 1-121. Active layer is measured manually using a metal rod. The dataset was iniated in 1996. Measurements are started as soon as the one point is free of snow in the grid. Measurements are repeated every week until all grid nodes are snow free, thereafter measurements are repeated every second week until the upper part of the soil starts to freeze." ;
    schema:distribution <https://data.g-e-m.dk/datasets/10.17897/2Q7S-2876> ;
    schema:identifier "https://data.g-e-m.dk/datasets/10.17897/2Q7S-2876" ;
    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 "ZEROCALM-1_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\": [[[-20.57, 74.47], [-20.57, 74.47], [-20.57, 74.47], [-20.57, 74.47]]]}" ] ] ;
    schema:temporalCoverage "1996-06-22/2024-09-05" ;
    schema:url "https://data.g-e-m.dk/datasets/10.17897/2Q7S-2876" ;
    schema:variableMeasured [ a schema:PropertyValue ;
            schema:name "Northing_mN" ;
            schema:propertyID <https://data.g-e-m.dk/datasets/10.17897/2Q7S-2876#column=Northing_mN> ;
            schema:unitText "M" ;
            schema:url <https://data.g-e-m.dk/datasets/10.17897/2Q7S-2876#column=Northing_mN> ],
        [ a schema:PropertyValue ;
            schema:description "The active layer is measure every 10 meter in the ZEROCALM-1 grid. Measurement points are nummered according to the chart in the dataset description, the grid nodes denote where the active layer is measured." ;
            schema:name "Grid_node" ;
            schema:propertyID <https://data.g-e-m.dk/datasets/10.17897/2Q7S-2876#column=Grid_node> ;
            schema:unitText "-" ;
            schema:url <https://data.g-e-m.dk/datasets/10.17897/2Q7S-2876#column=Grid_node> ],
        [ a schema:PropertyValue ;
            schema:name "Easting_mE" ;
            schema:propertyID <https://data.g-e-m.dk/datasets/10.17897/2Q7S-2876#column=Easting_mE> ;
            schema:unitText "M" ;
            schema:url <https://data.g-e-m.dk/datasets/10.17897/2Q7S-2876#column=Easting_mE> ],
        [ a schema:PropertyValue ;
            schema:description "-" ;
            schema:name "Date" ;
            schema:propertyID <https://data.g-e-m.dk/datasets/10.17897/2Q7S-2876#column=Date> ;
            schema:unitText "YYYY-MM-DD" ;
            schema:url <https://data.g-e-m.dk/datasets/10.17897/2Q7S-2876#column=Date> ],
        [ a schema:PropertyValue ;
            schema:description "Active layer thickness measured manually in cm. On the 2011-09-13 only the edges are measured, as the top soil layer had started to freeze." ;
            schema:name "Active_layer_cm" ;
            schema:propertyID <https://data.g-e-m.dk/datasets/10.17897/2Q7S-2876#column=Active_layer_cm> ;
            schema:unitText "Cm" ;
            schema:url <https://data.g-e-m.dk/datasets/10.17897/2Q7S-2876#column=Active_layer_cm> ] ;
    schema:version "1" ;
    owl:versionInfo "1" ;
    dcat:accessURL <https://data.g-e-m.dk/datasets/10.17897/2Q7S-2876> ;
    dcat:contactPoint [ a vcard:Organization ;
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    dcat:distribution <https://data.g-e-m.dk/datasets/10.17897/2Q7S-2876> ;
    dcat:keyword "ARCTIC",
        "ARCTIC TUNDRA",
        "CLIMATE INDICATORS",
        "ECOSYSTEMS",
        "GEOGRAPHY",
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        "PHYSICAL GEOGRAPHY",
        "SOILS" ;
    dcat:landingPage <https://data.g-e-m.dk/datasets/10.17897/2Q7S-2876> ;
    dcat:theme "zackenberg-research-station" .