<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>23.6</gcmd:keywordVersion>
    <gcmd:schemeVersion>2026-03-19T10:41:57.720Z</gcmd:schemeVersion>
    <gcmd:viewer>https://gcmd.earthdata.nasa.gov/KeywordViewer/scheme/sciencekeywords/61c3b720-abc8-4430-866c-f1da35d2cd0b</gcmd:viewer>
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  <skos:Concept rdf:about="61c3b720-abc8-4430-866c-f1da35d2cd0b">
    <skos:broader rdf:resource="2e5a401b-1507-4f57-82b8-36557c13b154"/>
    <skos:prefLabel xml:lang="en">AEROSOL OPTICAL DEPTH/THICKNESS</skos:prefLabel>
    <skos:changeNote>Date=2020-06-19 User Id=mmorahan Entity=NarrowerRelation Operation=INSERT 
User Note=Insert Concept
System Note=add narrower relation
New Value=AEROSOL OPTICAL DEPTH/THICKNESS [61c3b720-abc8-4430-866c-f1da35d2cd0b,83693] - UV AEROSOL INDEX [8d7e5d36-4d81-469d-9318-bf20ba3bae5c,560391]</skos:changeNote>
    <skos:changeNote>Date=2025-08-12 User Id=system System Note=Added narrower relation from AEROSOL OPTICAL DEPTH/THICKNESS [61c3b720-abc8-4430-866c-f1da35d2cd0b] to ABSORBING AEROSOL OPTICAL DEPTH/THICKNESS [ee84a17d-221f-4798-93f9-7cecc8400662]</skos:changeNote>
    <skos:changeNote>Date=2025-08-13 User Id=system System Note=Added narrower relation from AEROSOL OPTICAL DEPTH/THICKNESS [61c3b720-abc8-4430-866c-f1da35d2cd0b] to UV AEROSOL OPTICAL DEPTH [7acd7fd4-a9ed-4af9-a0e6-1f6bccb17a3c]</skos:changeNote>
    <gcmd:reference gcmd:text="NASA GCMD  The Glossary of Meteorology, American Meteorological Society, 1998. &lt;/BODY&gt;" xml:lang="en"/>
    <skos:narrower rdf:resource="8d7e5d36-4d81-469d-9318-bf20ba3bae5c"/>
    <skos:narrower rdf:resource="6e7306a1-79a5-482e-b646-74b75a1eaa48"/>
    <skos:narrower rdf:resource="ee84a17d-221f-4798-93f9-7cecc8400662"/>
    <skos:narrower rdf:resource="7acd7fd4-a9ed-4af9-a0e6-1f6bccb17a3c"/>
    <skos:definition xml:lang="en">The degree to which Aerosols prevent light from passing through. Opticaldepth/thickness depends upon the physical constitution ,the form, and theconcentration of particles.</skos:definition>
    <dcterms:modified>2020-06-19 13:45:45.0</dcterms:modified>
    <skos:inScheme rdf:resource="https://gcmd.earthdata.nasa.gov/kms/concepts/concept_scheme/sciencekeywords"/>
  </skos:Concept>
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