@prefix skos: <http://www.w3.org/2004/02/skos/core#> .

<https://gcmd.earthdata.nasa.gov/kms/concept/13723b5d-1945-4e62-8672-4535ffdddb87>
  skos:definition """In radiative transfer, optical thickness or optical depth is the mass of
a given absorbing or emitting material in a vertical column of
unit cross-sectional area and extending between two specified
levels."""@en ;
  skos:prefLabel "OPTICAL DEPTH/THICKNESS"@en ;
  skos:inScheme <https://gcmd.earthdata.nasa.gov/kms/concepts/concept_scheme/sciencekeywords> ;
  skos:broader <https://gcmd.earthdata.nasa.gov/kms/concept/4ad0c52d-6449-48ff-8678-adc6b2cebcb7> ;
  a skos:Concept .

<https://gcmd.earthdata.nasa.gov/kms/concept/4ad0c52d-6449-48ff-8678-adc6b2cebcb7>
  skos:prefLabel "ATMOSPHERIC RADIATION"@en ;
  a skos:Concept ;
  skos:narrower <https://gcmd.earthdata.nasa.gov/kms/concept/13723b5d-1945-4e62-8672-4535ffdddb87> .