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August 2, 2013Annual Review of Marine Science219 citationsOpen Access

Turbulence in the Upper-Ocean Mixed Layer

EDEric A. D’Asaro

Key Points

  • Assess whether surface wave interactions invalidate classical models of upper-ocean mixed layer turbulence driven solely by atmospheric fluxes and shear.
  • Reviewed historical and recent observational measurements of kinetic energy dissipation rates in the upper-ocean boundary layer.
  • Synthesized numerical findings from large-eddy simulations incorporating wave effects and the Craik-Leibovich vortex force.
  • Recent observational measurements deviate significantly from classical boundary layer theories, indicating strong surface wave influence.
  • Large-eddy simulations incorporating the Craik-Leibovich vortex force align with observations, though existing empirical data remain insufficient to establish a definitive new modeling paradigm.

Abstract

Nearly all operational models of upper-ocean mixing assume that the turbulence responsible for this mixing is driven by the atmospheric fluxes of momentum, heat, and moisture and the shear imposed by the ocean circulation. This idealization is supported by historical measurements of dissipation rate within the boundary layer. Detailed measurements made recently by many investigators and supported by theoretical and numerical results have found significant deviations from this classical view attributable to the influence of surface waves. Although a review of these measurements finds strong support for the influence of waves-and, in particular, for the predictions of large-eddy simulations, including the Craik-Leibovich vortex force-there are insufficient data to give definitive support to a new paradigm.

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Cite This Study

Eric A. D’Asaro (2013) studied this question.

synapsesocial.com/papers/69d8d4c617a1cc0598d18a9bhttps://doi.org/10.1146/annurev-marine-010213-135138
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