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| Le Sommer, Julien; Penduff, Thierry; Theetten, Sebastien; Madec, Gurvan; Barnier, Bernard. |
| Recent studies have shown that the use of an enstrophy-and-energy-conserving momentum advection scheme substantially reduces widespread biases of mean currents in the global 1/4 degrees DRAKKAR model. This paper investigates the origin of these improvements. A series of sensitivity simulations with different momentum advection schemes is performed with the North Atlantic 1/4 degrees DRAKKAR model. Three second order momentum advection schemes conserving, respectively, enstrophy (ens), energy (efx) and both quantities (een) are tested and their impact on the model solution are compared. The mean kinetic energy vertical profile is found to change up to 10% depending on the chosen scheme. This sensitivity is maximum in bottom layers. The analysis of the... |
| Tipo: Text |
Palavras-chave: Z level models; Topography; Momentum advection schemes. |
| Ano: 2009 |
URL: http://archimer.ifremer.fr/doc/2009/publication-6440.pdf |
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