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The LANS‐alpha turbulence model in primitive‐equation ocean modeling
Author(s) -
Petersen Mark R.,
Hecht Matthew W.,
Holm Darryl D.,
Wingate Beth A.
Publication year - 2007
Publication title -
pamm
Language(s) - English
Resource type - Journals
ISSN - 1617-7061
DOI - 10.1002/pamm.200700763
Subject(s) - turbulence , eddy , kinetic energy , turbulence kinetic energy , turbulence modeling , domain (mathematical analysis) , scale (ratio) , meteorology , k omega turbulence model , physics , grid , statistical physics , mechanics , environmental science , geology , classical mechanics , mathematics , geodesy , mathematical analysis , quantum mechanics
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)