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Book Sections Year : 2023

Modified (Hyper-)Viscosity for Coarse-Resolution Ocean Models


Abstract We present a simple parameterization for coarse-resolution ocean models. To replace computationally expensive high-resolution ocean models, we develop a computationally cheap parameterization for coarse-resolution models based solely on the modification of the viscosity term in advection equations. It is meant to reproduce the mean quantities like pressure, velocity, or vorticity computed from a high-resolution reference solution or using observations. We test this new parameterization on a double-gyre quasi-geostrophic model in the eddy-permitting regime. Our results show that the proposed scheme improves significantly the energy statistics and the intrinsic variability on the coarse mesh. This method shall serve as a deterministic basis model for coarse-resolution stochastic parameterizations in future works.

Dates and versions

hal-03910773 , version 1 (22-12-2022)



Louis Thiry, Long Li, Etienne Mémin. Modified (Hyper-)Viscosity for Coarse-Resolution Ocean Models. Stochastic Transport in Upper Ocean Dynamics, 10, Springer International Publishing, pp.273-285, 2023, Mathematics of Planet Earth, ⟨10.1007/978-3-031-18988-3_17⟩. ⟨hal-03910773⟩
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