Effect of grid-scale (EGS) turbulence on ocean modeling
Abstract
A new method of ocean dynamics modeling is presented by taking into account the grid-scale turbulence (GST). By GST we mean the average values of products of the prognostic variables pulsation (the second moments). They have been taken into account by the method of successive approximations. It is shown that the EGS turbulence is quite essential: it breaks the drastic fall in kinetic energy of the quasi-prognostic calculations, keeping it on a level up to 3--5 time larger than the direct prognostic value of kinetic energy (KE). These preliminary calculations have been done for the initial stage of adjustment. Still it is understandable already that by decreasing the grid-mesh, decreasing the time step and MDC, it is possible to reach equilibrium with higher (and more realistic) value of KE due to the EGS turbulence.
- Publication:
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EGS - AGU - EUG Joint Assembly
- Pub Date:
- April 2003
- Bibcode:
- 2003EAEJA......309S