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    <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/71c78d69-9cfe-48e9-8dd2-9c75acf22283</gcmd:viewer>
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  <skos:Concept rdf:about="71c78d69-9cfe-48e9-8dd2-9c75acf22283">
    <skos:broader rdf:resource="457883c4-b30c-4d26-bed8-6c2887ebbc90"/>
    <skos:prefLabel xml:lang="en">ATTENUATION/TRANSMISSION</skos:prefLabel>
    <gcmd:reference gcmd:text="Adapted from: Open University. 1991. Seawater: Its Composition, Properties and Behaviour. Pergamon Press. p. 60." xml:lang="en"/>
    <skos:definition xml:lang="en">Attenuation is the exponential loss of light intensity as lightpropagates through water. Attenuation is caused by absorption andscattering of light energy. Transmission is the measurement of thepercentage of light received at a photo cell placed at fixed distancesfrom a light source.</skos:definition>
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