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Fjord Circulation (Hydroform Type)

Component: Hydroform

Unique Identifier: 659

Hydroform Class Current
Hydroform Residual Current
Hydroform Type Fjord Circulation

Definition Circulation in estuaries that possess a sill at the seaward end, inhibiting inflow of seawater into the bottom waters. Seawater flows over the sill mixing into the intermediate water of the estuary, and sinking to the bottom. The estuary receives freshwater input in excess of evaporation and the resulting brackish mixture is exported across the sill into the ocean end-member. The limited exchange of bottom waters can promote hypoxic conditions in some fjord estuaries.