Convection from a Source in an Ocean Basin
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CitationSpeer, Kevin, and Eli Tziperman. 1990. Convection from a source in an ocean basin. Deep Sea Research Part A. Oceanographic Research Papers 37(3): 431-446.
AbstractA model is presented for the deep interior stratification and upwelling in an ocean basin connected to a marginal sea. Three elements make up the model: a marginal sea, a turbulent boundary current and an interior region. The system is subject to rotation. Once the forcing by an air-sea heat flux of the surface of the marginal sea is specified, the amount of dense water formed, the structure and trajectory of the boundary current carrying this water along a sloping bottom to the deep ocean, and the interior stratification can be calculated. As the boundary current flows along the bottom, it first entrains the surrounding water and its density decreases. When the density of the boundary current approaches that of the interior, near the bottom of the ocean, the current detrains and looses its water to the interior. Mass continuity for the interior requires the interior upwelling velocity to increase away from the bottom and then decrease at the levels where the boundary current entrains interior water. The interior density profile looks exponential although the interior upwelling varies with depth. The horizontal circulation implied by this vertical velocity profile and the large-scale linear vorticity equation is like that of Stommel and Arons (1960, Deep-Sea Research, 6 140–154) near the bottom, while at mid-depth the flow has the same pattern but moves in the opposite direction. An example with sloping interior walls is given, and the effect of rotation on the stratification is discussed.
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