  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.
