On the Role of Topography in the Ocean Circulation: Diffusive and Inertial Effects

Abstract

Abstract In an earlier paper it was shown that the presence of bottom topography can substantially alter the Sverdrup prediction for the large-scale wind driven flow. In their model the abyssal water is set in motion by the eddy field, parameterized as lateral diffusion of potential vorticity. If the topography has a structure in the east-west direction, then the solution found in the inviscid limit by Cessi and Pedlosky predicts the occurrence of strong jets in the interior of the model ocean. In this note I used a numerical model to test whether the jets predicted by the analytic solutions survive when inertia and diffusion are included explicitly. In the inviscid limit, according to the structure of the topography these internal jets can occur in both vertically homogeneous and stratified models. Specifically, if the topographic slope changes sign, then one kind of jets is observed both in baroclinic and barotropic models. In the present work it is shown that this phenomenon is observed with moderate a...