A note on 'Toward a stochastic parameterization of ocean mesoscale eddies'

作者：Grooms Ian^*; Zanna Laure

来源：Ocean Modelling, 2017, 113: 30-33.

DOI：10.1016/j.ocemod.2017.03.007

• Mesoscale eddies
• Stochastic parameterization
• Eddy backscatter

Porta Mana and Zanna (2014) recently proposed a subgrid-scale parameterization for eddy-permitting quasigeostrophic models. In this model the large-scale fluid is represented as a non-Newtonian viscoelastic medium, with a subgrid-stress closure that involves the Lagrangian derivative of large-scale quantities. This note derives this parameterization, including the nondimensional proportionality coefficient, using only two statistical assumptions: that the subgrid-scale term is locally homogeneous and decorrelates rapidly in space. The parameterization is then verified by comparing against eddy-resolving quasigeostrophic simulations, independently reproducing the results of Porta Mana and Zanna in a simpler model.

• 出版日期2017-5