Seasonal Changes of Estuarine Gravitational Circulation: Response to the Annual Temperature Change

نویسندگان

چکیده

Estuarine circulation is a vertical that develops along the salinity gradient in estuaries and nearshore coastal waters. Fresher, therefore less-dense, water flows out of estuary surface layer, while deeper inflow brings from open sea into estuary. This study uses 7 years situ current measurements hydrographic surveys to verify this has two modes: deep intrudes seabed, shallow-inflow penetrates subsurface layer. These modes show seasonal variability, i.e., deep-inflow mode occupies almost all winter season, whereas dominates during summer. change may play key role oxygen carbon dioxide (CO2) dynamics When transition deep- begins spring, cold mass forms on seabed upper isolated heating sources oxygenated water; consequently, becomes hypoxic accumulates both inorganic nutrients CO2 spring shallow- occurs, CO2, which trapped bottom-water, emitted atmosphere. The mechanism causes estuarine driven by spatial inhomogeneity or cooling lower generates horizontal density highlights importance temperature dynamics, not been extensively studied previously.

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ژورنال

عنوان ژورنال: Estuaries and Coasts

سال: 2021

ISSN: ['1559-2723', '1559-2731']

DOI: https://doi.org/10.1007/s12237-021-00991-6