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The fidelity of numerical simulations of the general circulation of the North Atlantic Ocean in basin- to global-scale models have improved considerably in the last several years. This improvement appears to represent a regime shift in the dynamics of the simulated flow as the horizontal grid spacing decreases to around 10km. Nevertheless, some significant biases in the simulated circulation and substantial...
A consistent mathematical formulation of a horizontally anisotropic friction operator is developed for use as a subgrid-scale turbulence parameterization in ocean general circulation models. It is derived as the divergence of a deviatoric stress tensor that represents the traceless part of the Reynolds stress tensor. The stress tensor is assumed to depend linearly on the velocity gradients, has the...
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