The LANS-alpha turbulence model in primitive-equation ocean modeling |
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| Authors: | Mark R Petersen Matthew W Hecht Darryl D Holm Beth A Wingate |
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| Institution: | 1. Los Alamos National Laboratory, Computer and Computational Sciences Div., Los Alamos, NM, USA;2. Los Alamos National Laboratory, Computer and Computational Sciences Div., Los Alamos, NM, USA
Dept. of Mathematics, Imperial College, London, UK |
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| Abstract: | The Lagrangian-Averaged Navier-Stokes alpha (LANS-α) and Leray turbulence parameterizations are demonstrated in a primitive-equation ocean model using an idealized channel domain. For LANS-α, turbulence statistics such as kinetic energy, eddy kinetic energy, and temperature profiles resemble doubled-resolution statistics with the standard model. In a North Atlantic domain with realistic topography, the Leray model increases eddy activity. The LANS-α and Leray models show great promise to improve heat transport and temperature distributions in global ocean-climate simulations, as these processes depend on better resolution of eddies near the grid-scale. (© 2008 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim) |
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