pindmiste vete sukeldumine, a process by which surface waters increase in density and sink, merivirtojen rannikoitten edustoille aikaansaamat pystysuorat virtaukset, joissa pintavettä laskeutuu pohjakerrokseen, the downward movement of surface waters caused by the convergence of different water masses in the open ocean, or where surface waters flow towards the coast (DE)