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Implementing diffusivities from linear stability analysis in a three-dimensional general circulation ocean model

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Zitation

Eden, C. (2012). Implementing diffusivities from linear stability analysis in a three-dimensional general circulation ocean model. OCEAN MODELLING, 57-58, 15-28. doi:10.1016/j.ocemod.2012.08.001.


Zitierlink: http://hdl.handle.net/11858/00-001M-0000-0017-C504-F
Zusammenfassung
Linear stability analysis is used to predict the vertical and lateral structure for the diffusivity related to meso-scale eddy buoyancy and potential vorticity fluxes in three-dimensional primitive equation models, following a suggestion by Peter D. Killworth. Using two idealized numerical models as example, it is shown that the linear stability analysis yields a consistent lateral and vertical structure for both lateral diffusivities. Parameterizations based on isopycnal thickness or potential vorticity diffusion are shown to be equivalent for constant diffusivities in quasi-geostrophic approximation. For spatially varying diffusivities they yield similar results in the model experiments, although the corresponding diffusivities show different vertical structure. (c) 2012 Elsevier Ltd. All rights reserved.