@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 xsd: <http://www.w3.org/2001/XMLSchema#> .

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        schema:Dataset,
        dcat:Dataset,
        dcat:Distribution,
        foaf:Document ;
    dct:description """This dataset contains continuous measurements of tree gas exchange with chambers at SMEAR I research station in Värriö, Salla, Finland, during years 1999–2020.

The data were exported from SMEAR database on the dataset release date. Most recent version of the data are available at https://smear.avaa.csc.fi/.
""" ;
    dct:identifier "https://doi.org/doi:10.23729/8f671518-d72a-462f-88ea-f828e8f8e8d7" ;
    dct:issued "2026-05-21T16:44:42.959339"^^xsd:dateTime,
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    dct:modified "2026-05-21T16:44:43.079691"^^xsd:dateTime,
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    dct:publisher [ a foaf:Agent ;
            foaf:name "University of Helsinki" ],
        [ a foaf:Agent ;
            foaf:name "University of Helsinki" ] ;
    dct:spatial [ a dct:Location ;
            locn:geometry "POINT (29.6099 67.7549)"^^gsp:wktLiteral ] ;
    dct:temporal [ a dct:PeriodOfTime ;
            dcat:endDate "2020-12-31"^^xsd:date ;
            dcat:startDate "1999-01-01"^^xsd:date ],
        [ a dct:PeriodOfTime ;
            dcat:endDate "2020-12-31"^^xsd:date ;
            dcat:startDate "1999-01-01"^^xsd:date ] ;
    dct:title "SMEAR I Värriö tree gas exchange" ;
    schema:about [ a schema:Thing ;
            schema:name "varrio-subarctic-research-station" ] ;
    schema:creator [ a schema:Organization ;
            schema:contactPoint [ a schema:ContactPoint ;
                    schema:contactType "customer service" ;
                    schema:name "University of Helsinki (UH - Partner 15)" ;
                    schema:url "https://doi.org/doi:10.23729/8f671518-d72a-462f-88ea-f828e8f8e8d7" ] ;
            schema:name "University of Helsinki (UH - Partner 15)" ] ;
    schema:dateModified "2026-05-21T16:44:43.079691" ;
    schema:datePublished "2022-04-22",
        "2022-04-22T00:00:00" ;
    schema:description """This dataset contains continuous measurements of tree gas exchange with chambers at SMEAR I research station in Värriö, Salla, Finland, during years 1999–2020.

The data were exported from SMEAR database on the dataset release date. Most recent version of the data are available at https://smear.avaa.csc.fi/.
""" ;
    schema:distribution <https://doi.org/doi:10.23729/8f671518-d72a-462f-88ea-f828e8f8e8d7> ;
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    schema:keywords "Pinus sylvestris",
        "Scots pine",
        "SmartSMEAR",
        "chamber",
        "photosynthesis",
        "transpiration" ;
    schema:license "https://spdx.org/licenses/CC-BY-SA-4.0" ;
    schema:name "SMEAR I Värriö tree gas exchange" ;
    schema:provider [ a schema:Organization ;
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    schema:publisher [ a schema:Organization ;
            schema:contactPoint [ a schema:ContactPoint ;
                    schema:contactType "customer service" ;
                    schema:name "University of Helsinki" ;
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            schema:name "University of Helsinki" ] ;
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    schema:url "https://doi.org/doi:10.23729/8f671518-d72a-462f-88ea-f828e8f8e8d7" ;
    schema:variableMeasured [ a schema:PropertyValue ;
            schema:name "Photosynthetically active radiation" ;
            schema:unitText "µmol m⁻² s⁻¹" ],
        [ a schema:PropertyValue ;
            schema:name "Pine shoot CO2 exchange" ;
            schema:unitText "µg m⁻² s⁻¹" ],
        [ a schema:PropertyValue ;
            schema:name "Water vapour concentration" ;
            schema:unitText "g m⁻³" ],
        [ a schema:PropertyValue ;
            schema:name "Air temperature" ;
            schema:unitText "°C" ],
        [ a schema:PropertyValue ;
            schema:name "Carbon dioxide concentration" ;
            schema:unitText "ppm" ],
        [ a schema:PropertyValue ;
            schema:name "Pine shoot transpiration" ;
            schema:unitText "mg m⁻² s⁻¹" ] ;
    schema:version "1.0" ;
    owl:versionInfo "1.0" ;
    dcat:accessURL <https://doi.org/doi:10.23729/8f671518-d72a-462f-88ea-f828e8f8e8d7> ;
    dcat:distribution <https://doi.org/doi:10.23729/8f671518-d72a-462f-88ea-f828e8f8e8d7> ;
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