downwelling

[ doun-wel-ing ]
/ ˈdaʊnˌwɛl ɪŋ /

noun Oceanography.

a downward current of surface water in the ocean, usually caused by differences in the density of seawater.

Origin of downwelling

First recorded in 1965–70; down1 + well2 + -ing1
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019