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K. Shafer Smith and John Marshall

. Spectra from the simulation ( Fig. 9 shows the vertically integrated kinetic and available potential energy spectra) indicate a well-resolved enstrophy cascade and a typical eddy radius of about 40 km. The inverse cascade in this simulation is present but short: the eddies equilibrate at only about three times the deformation radius. Physical space fields (not shown) indicate that the flow is horizontally homogeneous—no jets form—consistent with a drag-based cascade-halting mechanism ( Smith et al

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Michael A. Spall

structure of multiple zonal jets with small meridional scale, compared to within the no-slip boundary layer, where the perturbations are oriented more perpendicular to the boundary and span the boundary layer width. The temperature field at 15-m depth is dominated by narrow bands of dense water below the convergence zones in the surface layer ( Fig. 9c ). The vertical velocity in these regions is downward, bringing down the more dense waters with negative potential vorticity formed at the surface

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