where v is the viscosity and K is the temperature diffusivity. The Prandtl number is used to describe the ratio of momentum dissipation and tracer mixing. At the level of molecular dissipation and mixing, the Prandtl number for seawater is approximately equal to 8; however, owing to strong eddy and turbulent activity, the equivalent Prandtl number for the large-scale geostrophic turbulence may be quite different from this value.


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