@prefix dct: . @prefix ns1: . @prefix ns2: . @prefix ns3: . @prefix rdfs: . @prefix skos: . a skos:Concept ; dct:created "2019-01-14" ; dct:modified "2019-01-14" ; ns3:hasProfile ; ns1:status ; rdfs:seeAlso ; skos:definition "The optical thickness is the integral along the path of radiation of a volume scattering/absorption/attenuation coefficient. The radiative flux is reduced by a factor exp(-optical_thickness) on traversing the path. A coordinate variable of radiation_wavelength or radiation_frequency can be specified to indicate that the optical thickness applies at specific wavelengths or frequencies. Absorption optical thickness means that part of the atmosphere optical thickness that is caused by the absorption of incident radiation. Aerosol means the system of suspended liquid or solid particles in air (except cloud droplets) and their carrier gas"@en ; skos:exactMatch ; skos:prefLabel "atmosphere absorption optical thickness due to particulate organic matter ambient aerosol particles"@en ; ns2:hadPrimarySource .