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Deep Circulation (Hydroform)

Component: Hydroform

Unique Identifier: 632

Hydroform Class Current
Hydroform Deep Circulation
Hydroform Type Abyssal Deep Circulation
Bathyl Deep Circulation

Definition The mass circulation of the oceans that carries cold polar surface water to depth, sinking due to higher density and wind forcing. The mass transport also carries salt, oxygen, and other properties. Deep circulation is wind driven, with a tidal mixing component. It cools the surface and evaporates water, which determines where deep convection occurs. Wind-driven turbulence in the deep ocean mixes cold water upward at lower latitudes. Deep circulation has relative slow current movements but transport of water is comparable to surface transport and is responsible for closing the Earth's heat budget and determining climate.