<rdf:RDF xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns:skos="http://www.w3.org/2004/02/skos/core#" xmlns:gcmd="https://gcmd.earthdata.nasa.gov/kms#" xmlns:dcterms="http://purl.org/dc/terms/" xml:base="https://gcmd.earthdata.nasa.gov/kms/concept/">
  <gcmd:gcmd>
    <gcmd:termsOfUse>https://cdn.earthdata.nasa.gov/conduit/upload/5182/KeywordsCommunityGuide_Baseline_v1_SIGNED_FINAL.pdf</gcmd:termsOfUse>
    <gcmd:keywordVersion>23.7</gcmd:keywordVersion>
    <gcmd:schemeVersion>2026-04-15T10:53:30.610Z</gcmd:schemeVersion>
    <gcmd:viewer>https://gcmd.earthdata.nasa.gov/KeywordViewer/scheme/sciencekeywords/63c7d604-707e-4c38-8baf-19a620e61917</gcmd:viewer>
  </gcmd:gcmd>
  <skos:Concept rdf:about="63c7d604-707e-4c38-8baf-19a620e61917">
    <skos:broader rdf:resource="dba19648-3f52-48ba-b00b-8527d44c4d74"/>
    <skos:prefLabel xml:lang="en">PARTICULATE MATTER</skos:prefLabel>
    <gcmd:reference gcmd:text="National Ice Core Laboratory:  http://www.nicl-smo.sr.unh.edu/documents/1988/solubleInsoluble.html" xml:lang="en"/>
    <skos:definition xml:lang="en">Particulate matter in ice cores (continental dust, volcanic ash, diatoms, andpollen)can provide information on past climate conditions and climatevariability.</skos:definition>
    <skos:inScheme rdf:resource="https://gcmd.earthdata.nasa.gov/kms/concepts/concept_scheme/sciencekeywords"/>
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