PREFIX rdf: PREFIX rdfs: PREFIX skos: PREFIX owl: PREFIX xsd: PREFIX dcterms: PREFIX dcat: PREFIX dcmitype: PREFIX foaf: PREFIX geo: PREFIX vcard: PREFIX prov: PREFIX odrs: PREFIX sosa: PREFIX sdo: PREFIX ef: PREFIX doo: PREFIX adms: PREFIX : :077fecc1-6244-4fd7-9d41-6f98763f5f14 dcterms:title "Hydrogen soil flux measurements using the aerodynamic gradient technique at a grassland in central Scotland, August 2024-September 2025" ; dcterms:identifier ; adms:identifier ; dcterms:bibliographicCitation "Cowan, N., Hanlon, M., Bezanger, A., Di Marco, C., Carole, H., Nemitz, E., Drewer, J. (2026). Hydrogen soil flux measurements using the aerodynamic gradient technique at a grassland in central Scotland, August 2024-September 2025. NERC EDS Environmental Information Data Centre. https://doi.org/10.5285/077fecc1-6244-4fd7-9d41-6f98763f5f14" ; dcterms:description "Measurements were conducted at a long-term environmental monitoring site at Easter Bush Farm in Midlothian, central Scotland. The aerodynamic gradient (AG) flux method was used to measure gas fluxes of H2, and also of CO2. A mast with four inlet heights (0.55, 0.90, 1.70 and 3.05 m) was positioned within an enclosure between two grazed grassland fields. An eddy covariance (EC) mast was erected also in the enclosure adjacent to the AG mast to provide a reference measurement against which to assess the performance of the AG method. Continuous measurements of soil temperature and soil volumetric water content (VWC) were made throughout the measurement period at 5, 10, 20 and 50 cm depth in the soil using buried CS655 water content reflectometers and CS109 temperature probes (both Campbell Scientific, Utah, USA). Air temperature and relative humidity were measured by a HMP60 Humidity and Temperature Probe (Vaisala, Vantaa, Finland) at a height of 1.85 m." ; dcterms:provenance [ a dcterms:ProvenanceStatement ; rdfs:label "Several stages of data filtering were applied to improve the quality of retained AG flux data. Initial filtering was based on wind conditions for which data was discarded when u_* < 0.1 m s-1, L < ± 2 m, the variance in vertical wind speed > 1 m s-1 or wind was from the direction obscured by the cabin (130 - 150 ˚N) or fence line between the fields (305 - 315 ˚N). As EC data was used to quality check AGM fluxes, all data was discarded when CO2 flux data was flagged using the 0-1-2 quality flagging system. Where quality flags for sensible heat (H), momentum ( 𝜏) or CO2 flux were >1, data was discarded from the analysis. Plausible limits on CO2 flux at the site were deemed to be within -50 to 25 µmol m-2 s-1. Any EC flux data beyond these limits was also used to discard data. A further filtering of the H2 data was applied based on the comparison of CO2 flux measured between the AG and EC methods. Periods when measured CO2 fluxes by both AG and EC methods differed by more than ± 10 µmol m-2 s-1 were taken as indicative that conditions for AGM calculations were not ideal, thus flux data was discarded from the analysis. After data filtering, approximately 38 % of measured H2 flux data remained." ] ; dcterms:spatial [ a dcterms:Location ; dcat:bbox "POLYGON((-3.213 55.863, -3.213 55.871, -3.199 55.871, -3.199 55.863, -3.213 55.863))"^^geo:wktLiteral ; ] ; dcterms:temporal [ a dcterms:PeriodOfTime ; dcat:startDate "2024-08-01"^^xsd:date ; dcat:endDate "2025-09-30"^^xsd:date ; ] ; dcat:contactPoint :077fecc1-6244-4fd7-9d41-6f98763f5f14_c0 ; dcterms:publisher ; dcterms:subject , "Gas Flux", "Micrometeorological flux measurement", "Hydrogen gas", "Carbon dioxide" ; prov:wasGeneratedBy ; a dcat:Dataset; dcterms:type dcmitype:Dataset ; dcterms:available "2026-07-16"^^xsd:date ; dcat:landingPage , ; dcterms:license ; dcterms:accessRights ; dcterms:theme ; dcterms:creator , :077fecc1-6244-4fd7-9d41-6f98763f5f14_a1, :077fecc1-6244-4fd7-9d41-6f98763f5f14_a2, , , , ; dcterms:language . :077fecc1-6244-4fd7-9d41-6f98763f5f14_c0 a foaf:Person ; foaf:name "Nicholas Cowan" ; vcard:hasEmail "enquiries@ceh.ac.uk" ; foaf:member ; . a foaf:Organization ; foaf:name "NERC EDS Environmental Information Data Centre" ; vcard:hasEmail "info@eidc.ac.uk" ; foaf:member ; . a foaf:Person ; foaf:name "Cowan, N." ; foaf:familyName "Cowan" ; foaf:givenName "Nicholas" ; vcard:hasEmail "enquiries@ceh.ac.uk" ; foaf:member [foaf:name "UK Centre for Ecology and Hydrology"] ; . :077fecc1-6244-4fd7-9d41-6f98763f5f14_a1 a foaf:Person ; foaf:name "Hanlon, M." ; foaf:familyName "Hanlon" ; foaf:givenName "Mark" ; vcard:hasEmail "enquiries@ceh.ac.uk" ; foaf:member [foaf:name "UK Centre for Ecology and Hydrology"] ; . :077fecc1-6244-4fd7-9d41-6f98763f5f14_a2 a foaf:Person ; foaf:name "Bezanger, A." ; foaf:familyName "Bezanger" ; foaf:givenName "Aurelia" ; vcard:hasEmail "enquiries@ceh.ac.uk" ; foaf:member [foaf:name "UK Centre for Ecology and Hydrology"] ; . a foaf:Person ; foaf:name "Di Marco, C." ; foaf:familyName "Di Marco" ; foaf:givenName "Chiara" ; vcard:hasEmail "enquiries@ceh.ac.uk" ; foaf:member [foaf:name "UK Centre for Ecology and Hydrology"] ; . a foaf:Person ; foaf:name "Carole, H." ; foaf:familyName "Carole" ; foaf:givenName "Helfter" ; vcard:hasEmail "enquiries@ceh.ac.uk" ; foaf:member [foaf:name "UK Centre for Ecology and Hydrology"] ; . a foaf:Person ; foaf:name "Nemitz, E." ; foaf:familyName "Nemitz" ; foaf:givenName "Eiko" ; vcard:hasEmail "enquiries@ceh.ac.uk" ; foaf:member [foaf:name "UK Centre for Ecology and Hydrology"] ; . a foaf:Person ; foaf:name "Drewer, J." ; foaf:familyName "Drewer" ; foaf:givenName "Julia" ; vcard:hasEmail "enquiries@ceh.ac.uk" ; foaf:member [foaf:name "UK Centre for Ecology and Hydrology"] ; . a skos:Concept; skos:prefLabel "Climate and climate change"; rdfs:label "Climate and climate change" . a foaf:Organization ; foaf:name "UK Centre for Ecology & Hydrology" . a prov:Activity ; rdfs:label "The Enigma of the Soil Hydrogen Sink Variability [ELGAR]" .