warm surface current western boundary current 2010-03-16T12:26:13Z A warm water, narrow marine surface current flowing from the equator to high latitudes at speeds between 40 and 120 kilometers per day. Western boundary currents are the deepest ocean surface flows, usually extending 1000 meters below the ocean surface. ENVO ENVO:01000103 ORCID:0000-0002-4366-3088 SWEETRealm:WesternBoundaryCurrent