A note on ‘Toward a stochastic parameterization of ocean mesoscale eddies’

Ian Grooms, Laure Zanna

Research output: Contribution to journalArticle

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 languageEnglish (US)
Pages (from-to)30-33
Number of pages4
JournalOcean Modelling
Volume113
DOIs
StatePublished - 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

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