Abstract
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.
Original language | English (US) |
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Pages (from-to) | 30-33 |
Number of pages | 4 |
Journal | Ocean Modelling |
Volume | 113 |
DOIs | |
State | Published - May 1 2017 |
Keywords
- Eddy backscatter
- Mesoscale eddies
- Stochastic parameterization
ASJC Scopus subject areas
- Computer Science (miscellaneous)
- Oceanography
- Geotechnical Engineering and Engineering Geology
- Atmospheric Science