@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" ; ns2:hasProfile ; ns1:status ; rdfs:seeAlso ; skos:definition "X_area_fraction means the fraction of horizontal area occupied by X. Sea ice area fraction is area of the sea surface occupied by sea ice. It is also called sea ice concentration. The specification of a physical process by the phrase due_to_process means that the quantity named is a single term in a sum of terms which together compose the general quantity named by omitting the phrase. tendency_of_X means derivative of X with respect to time. Sea ice ridging occurs in rough sea conditions. The motion of the sea surface can cause areas of sea ice to deform and fold resulting in ridged upper and lower surfaces. The ridges can be as much as twenty metres thick if thick ice is deformed."@en ; skos:exactMatch ; skos:prefLabel "tendency of sea ice area fraction due to ridging"@en ; ns3:hadPrimarySource .