@prefix cpm: . @prefix dc: . @prefix dcat: . @prefix dce: . @prefix dct: . @prefix grg: . @prefix iop: . @prefix ns0: . @prefix ns1: . @prefix owl: . @prefix pav: . @prefix prov: . @prefix puv: . @prefix qudt: . @prefix rdf: . @prefix rdfs: . @prefix reg: . @prefix semapv: . @prefix skos: . @prefix sssom: . @prefix void: . skos:related . skos:related . skos:member . skos:altLabel "" ; skos:broader ; 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\". The sign convention is that \"upwelling\" is positive upwards and \"downwelling\" is positive downwards. A photon flux is specified in terms of numbers of photons expressed in moles. In accordance with common usage in geophysical disciplines, \"flux\" implies per unit area, called \"flux density\" in physics. A coordinate variable for radiation wavelength should be given the standard name radiation_wavelength."@en ; skos:notation "SDN:P07::QASZPOPC" ; skos:note "accepted"@en ; skos:prefLabel "surface_downwelling_photon_flux_per_unit_wavelength_in_sea_water"@en ; skos:related . skos:exactMatch . skos:exactMatch . skos:narrower . skos:narrower .