The baroclinic residual circulation in shallow seas |
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| Authors: | Feng Shizuo Xi Pangen Zhang Shuzhen |
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| Institution: | (1) Shandong College of Oceanology, Qingdao |
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| Abstract: | There are two different modeling approaches which have been proposed and utilized to derive residual currents: the first approach
is equivalent to deducing residual currents from current-meter records using filtering techniques or time averages of time-series
records to remove tidal variations; in the second approach, filters or time averages over several tidal cycles are applied
to the hydrodynamic equations to generate the governing equations for residual circulation. Based on the latter, both the
baroclinic dynamic models of residual circulation are proposed, of which one is a two-dimensional transport model and the
other is a three-dimensional model with variable eddy viscosity. The two-dimensional transport model is a direct generalization
from the barotropic model of residual circulation presented by Nihoul and Randy (1975) and Heaps (1978) to the baroclinic
model. In the three-dimensional model with variable eddy viscosity, using a Sturm-Liouville system adopted in the reference
5], the nondimensional problem for residual circulation reduces to the nondimensional problem of the elevation and the expression
of residual currents.
It should be pointed out that both the baroclinic models developed in the present paper are confined to describe the Eulerian
residual circulation only. |
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| Keywords: | |
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