Abstract
AbstractFalse diapycnal mixing often occurs due to horizontal diffusion in the simulation of heat, salinity, or water quality in estuaries by using a σ co‐ordinated ocean model. The Princeton ocean model (POM) is used as a basic σ co‐ordinated model and is applied to Tokyo Bay. Only river discharges are introduced into the model as external forces. Two remedies recommended in the POM, Stelling's horizontal diffusion approximation, Huang's new diffusion formula, Song and Haidvogel's s co‐ordinates, and Smolarkiewicz advection scheme have all been examined for suppressing the false diapycnal mixing. The conclusions are that the simultaneous use of POM's remedy and Stelling's approximation and the simultaneous use of POM's remedy and s co‐ordinates are the most effective. Copyright © 2001 John Wiley & Sons, Ltd.
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