Ocean Modeling and Parameterization

The realism of large scale numerical ocean models has improved dra­ matically in recent years, in part because modern computers permit a more faithful representation of the differential equations by their algebraic analogs. Equally significant, if not more so, has been the improved under­ standing of physical processes on space and time scales smaller than those that can be represented in such models. Today, some of the most challeng­ ing issues remaining in ocean modeling are associated with parameterizing the effects of these high-frequency, small-space scale processes. Accurate parameterizations are especially needed in long term integrations of coarse resolution ocean models that are designed to understand the ocean vari­ ability within the climate system on seasonal to decadal time scales. Traditionally, parameterizations of subgrid-scale, high-frequency mo­ tions in ocean modeling have been based on simple formulations, such as the Reynolds decomposition with constant diffusivity values. Until recently, modelers were concerned with first order issues such as a correct represen­ tation of the basic features of the ocean circulation. As the numerical simu­ lations become…

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More by Eric P. Chassignet; Jacques Verron

More by Eric P. Chassignet; Jacques Verron