@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 "Snow density is measured manually in snow pits, various places in the Zackenberg valley, during snow covered periods. In this dataset every position is given with its UTM coordinates (WGS 84, UTM Zone 27N) and with the name of the location, where measurements are conducted in the vicinity of existing plots. The densities are never sampled within the existing plots (unless otherwise stated), but in a radius of at least 10 meters from the plot, in an area in which the conditions and characteristics of the snowpack are similar to the given plot. The positions of all the locations are given here in UTM coordiantes (WGS 84, UTM Zone 27N). From 2017 the hand hardness of each layer in the snow pit is also recorded, with the five different categories: fist, 4f (four fingers), 1f (one finger), p (pencil), and k (knife)." ; dct:identifier "https://data.g-e-m.dk/datasets/10.17897/1EHD-DV51" ; dct:issued "2026-05-20T13:19:08.012442"^^xsd:dateTime, "2026-05-20T16:14:47.163983"^^xsd:dateTime ; dct:modified "2026-05-20T16:14:47.139102"^^xsd:dateTime, "2026-05-20T16:14:47.157655"^^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 ((-20.5700 74.4700, -20.5700 74.4700, -20.5700 74.4700, -20.5700 74.4700))"^^gsp:wktLiteral ] ; dct:temporal [ a dct:PeriodOfTime ; dcat:endDate "2024-04-22"^^xsd:date ; dcat:startDate "2000-06-04"^^xsd:date ], [ a dct:PeriodOfTime ; dcat:endDate "2024-04-22"^^xsd:date ; dcat:startDate "2000-06-04"^^xsd:date ] ; dct:title "Snow density (snow pit)" ; 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/10.17897/1EHD-DV51" ] ; schema:name "University of Copenhagen (UCPH - Partner 3)" ] ; schema:dateModified "2026-05-20T16:14:47.139102" ; schema:datePublished "2020-01-01", "2020-01-01T00:00:00" ; schema:description "Snow density is measured manually in snow pits, various places in the Zackenberg valley, during snow covered periods. In this dataset every position is given with its UTM coordinates (WGS 84, UTM Zone 27N) and with the name of the location, where measurements are conducted in the vicinity of existing plots. The densities are never sampled within the existing plots (unless otherwise stated), but in a radius of at least 10 meters from the plot, in an area in which the conditions and characteristics of the snowpack are similar to the given plot. The positions of all the locations are given here in UTM coordiantes (WGS 84, UTM Zone 27N). From 2017 the hand hardness of each layer in the snow pit is also recorded, with the five different categories: fist, 4f (four fingers), 1f (one finger), p (pencil), and k (knife)." ; schema:distribution ; schema:identifier "https://data.g-e-m.dk/datasets/10.17897/1EHD-DV51" ; schema:keywords "ARCTIC", "CLIMATE INDICATORS", "ECOSYSTEMS", "GEOGRAPHY", "GREENLAND", "PHYSICAL GEOGRAPHY", "SNOW-ICE" ; schema:license "https://creativecommons.org/licenses/by-sa/4.0/" ; schema:name "Snow density (snow pit)" ; 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 "2000-06-04/2024-04-22" ; schema:url "https://data.g-e-m.dk/datasets/10.17897/1EHD-DV51" ; schema:variableMeasured [ a schema:PropertyValue ; schema:description "Vertical height above ground, in which the temperature of the snow pack is measured" ; schema:name "Height_above_ground_for_temperature_measurement_cm" ; schema:propertyID ; schema:unitText "Cm" ; schema:url ], [ a schema:PropertyValue ; schema:name "Time" ; schema:propertyID ; schema:unitText "HH:MM" ; schema:url ], [ a schema:PropertyValue ; schema:description "Measure of the hardness of the snow" ; schema:name "Hand Hardness" ; schema:propertyID ; schema:unitText "-" ; schema:url ], [ a schema:PropertyValue ; schema:description "Temperature of the snow pack" ; schema:name "Snow_temperature_°C" ; schema:propertyID ; schema:unitText "°C" ; schema:url ], [ a schema:PropertyValue ; schema:description "Vertical position of the equipment used for sampling in the snow pit, bottom" ; schema:name "Height_above_ground_bottom_cm" ; schema:propertyID ; schema:unitText "Cm" ; schema:url ], [ a schema:PropertyValue ; schema:description "Altitude above sea level, given in meters" ; schema:name "Altitude_m a.s.l." ; schema:propertyID ; schema:unitText "M" ; schema:url ], [ a schema:PropertyValue ; schema:description "Positions are given in UTM coordinates (WGS 84, UTM Zone 27N)" ; schema:name "Easting_mE" ; schema:propertyID ; schema:unitText "M" ; schema:url ], [ a schema:PropertyValue ; schema:description "Snow depth measured manually in cm" ; schema:name "Total_snow_depth_cm" ; schema:propertyID ; schema:unitText "Cm" ; schema:url ], [ a schema:PropertyValue ; schema:description "Positions are given in UTM coordinates (WGS 84, UTM Zone 27N)" ; schema:name "Northing_mN" ; schema:propertyID ; schema:unitText "M" ; schema:url ], [ a schema:PropertyValue ; schema:description "Computed density of the snow sampled in grams per cubic centimeter, replicate 2, if it exists" ; schema:name "Density_g/cm3_rep2" ; schema:propertyID ; schema:unitText "g cm-3" ; schema:url ], [ a schema:PropertyValue ; schema:description "General remarks about the condition of the snowpack, any comments about the sampling, etc." ; schema:name "Remarks" ; schema:propertyID ; schema:unitText "-" ; schema:url ], [ a schema:PropertyValue ; schema:description "Computed density of the snow sampled in grams per cubic centimeter, replicate 3, if it exists" ; schema:name "Density_g/cm3_rep3" ; schema:propertyID ; schema:unitText "g cm-3" ; schema:url ], [ a schema:PropertyValue ; schema:description "Vertical position of the equipment used for sampling in the snow pit, top" ; schema:name "Height_above_ground_top_cm" ; schema:propertyID ; schema:unitText "Cm" ; schema:url ], [ a schema:PropertyValue ; schema:description "Computed density of the snow sampled in grams per cubic centimeter, replicate 1" ; schema:name "Density_g/cm3_rep1" ; schema:propertyID ; schema:unitText "g cm-3" ; schema:url ], [ a schema:PropertyValue ; schema:description "Name of location, where densities are taken near existing plots" ; schema:name "Location" ; schema:propertyID ; schema:unitText "-" ; schema:url ], [ a schema:PropertyValue ; schema:name "Date" ; schema:propertyID ; schema:unitText "YYYY-MM-DD" ; schema:url ], [ a schema:PropertyValue ; schema:description "Equipment used to take sample" ; schema:name "Sampling_method" ; schema:propertyID ; schema:unitText "-" ; 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", "CLIMATE INDICATORS", "ECOSYSTEMS", "GEOGRAPHY", "GREENLAND", "PHYSICAL GEOGRAPHY", "SNOW-ICE" ; dcat:landingPage ; dcat:theme "zackenberg-research-station" .