Definitions for upwellingʌpˈwɛl ɪŋ
Random House Webster's College Dictionary
an act or instance of welling up.
Category: Common Vocabulary
an upward flow of cold, heavy deep-sea water, laden with nutrients, as warm surface water is drawn away by offshore currents.
Origin of upwelling:
An upward movement from a lower source.
the oceanographic phenomenon that occurs when strong, usually seasonal, winds push water away from the coast, bringing cold, nutrient-rich deep waters up to the surface