ocean current upwelling MERGED DEFINITION: TARGET DEFINITION: An oceanographic feature that involves wind-driven motion of dense, cooler, and usually nutrient-rich water towards the ocean surface, replacing the warmer, usually nutrient-deplete surface water. -------------------- SOURCE DEFINITION: A marine upwelling is a net flow of marine water to the surface of the water column from deeper regions. This is often a result of surface water displacement off continental coasts by wind action. Localised upwellings may also occur along divergent fronts around eddies and along some of the major oceanographic features. Deeper waters often have higher nutrient content; consequently blooms of primary producers, such as planktonic algae, are generally observed around upwelling zones. This term is specific to marine upwellings. EcoLexicon:upwelling ENVO:01000063 https://en.wikipedia.org/wiki/Upwelling marine upwelling SWEETRealm:Upwelling EcoLexicon:upwell