@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" ; ns1:hasProfile ; ns2:status ; rdfs:seeAlso ; skos:definition "The surface called surface means the lower boundary of the atmosphere. Downwelling radiation is radiation from above. It does not mean net downward. Photosynthetic radiation is the part of the spectrum which is used in photosynthesis e.g. 400-700 nm. The range of wavelengths could be specified precisely by the bounds of a coordinate of radiation_wavelength. When thought of as being incident on a surface"@en ; skos:exactMatch ; skos:prefLabel "surface downwelling photosynthetic radiative flux in air"@en ; ns3:hadPrimarySource .