LARGE EDDY SIMULATION OF THE OCEAN MIXED LAYER: THE EFFECTS OF WAVE BREAKING AND LANGMUIR CIRCULATION

By Y. Noh, H. Min, Siegfried Raasch. Proceeding of Third Symposium on Turbulence and Shear Flow Phenomena, 2004

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Abstract Large eddy simulation (LES) of the ocean mixed layer was performed in which both wave breaking and Langmuir circulation are realized. Wave breaking was represented by random forcing consistent with the observed near-surface turbulence, and Langmuir circulation was realized by the Craig–Leibovich vortex force. High- resolution simulations were carried out using parallel computing with or without each contribution, wave breaking and Langmuir circulation, with an aim to clarify their respective roles in the ocean mixed layer. The effects of wave breaking were found to be mainly limited to the near-surface zone of the upper few meters. Langmuir circulations below it are not significantly modified, although they become somewhat weakened and less coherent. Under the influence of wave breaking, however, the turbulence production in the upper-ocean mixed layer becomes dominated by the turbulent kinetic energy flux, contrary to the case of the atmospheric boundary layer where it is dominated by shear prod...

Subfields: Atmospheric Science, Oceanography

View Paper: https://www.semanticscholar.org/paper/66e7defd09e88247fb8fc2324842d044244f2efc

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Citations in the corpus

Overview of the PALM model system 6.0 (2019, methodology): “The current implementation of wave effects strictly follows Noh et al. (2004), in particular the parameterization of wave breaking. Note that Noh et al. (2004) used an earlier version of PALM, where the programming of the wave effects was completely realized via PALM’s user interface.”
Characteristics of Langmuir Turbulence in the Ocean Mixed Layer (2009, background): “Recently Noh and Min (2004) and Sullivan et al. (2007) have included parameterizations of wave breaking in large-eddy simulations of Langmuir turbulence.”
Surface gravity wave effects in the oceanic boundary layer: large-eddy simulation with vortex force and stochastic breakers (2007, background): “It is interesting to compare our model for breaker work (4.14) with the breaker energy flux model first proposed by Craig & Banner (1994) (the latter is used in the LES described by Noh et al. (2004)).”
The form and orientation of Langmuir cells for misaligned winds and waves (2012, methodology): “…Smith, 1992; D’Asaro and Dairiki, 1997] and large eddy simulations (LES) of the Craik-Leibovich (CL) equations [Craik, 1977; Skyllingstad and Denbo, 1995; McWilliams et al., 1997; Noh et al., 2004; Sullivan et al., 2004, 2007; Li et al., 2005; Polton and Belcher, 2007; Grant and Belcher, 2009].”
A global wave parameter database for geophysical applications. Part 1: Wave-current turbulence interaction parameters for the open ocean based on traditional parameterizations (2008, background): “Finally, the wave momentum and its interactions with the current are known to be at the origin of Langmuir circulation (Langmuir, 1938; Craik and Leibovich, 1977; Garrett, 1976), which are believed to be the dominant vertical mixing mechanism for momentum and tracers, through the whole mixed layer (”
Large-Eddy Simulation of Langmuir Turbulence in Pure Wind Seas (2006, methodology): “Several wave-breaking param-eterizations have been proposed and included in mixed layer turbulence simulations with varying results (Noh et al. 2004; Sullivan et al. 2004a,b, 2005).”
Dynamics of Winds and Currents Coupled to Surface Waves (2010, methodology): “Noh et al. (2004) also examined this regime, but with a representation of wave breaking collapsed to the water surface using the Craig (2005) boundary condition.”
Wave Modeling—Missing the Peaks (2009, background): “These are very relevant processes, and they affect the mixed layer (see, e.g., Melville et al. 1998; McWilliams and Sullivan 2000; Qiao et al. 2004; Noh et al. 2004) and the general circulation (Melville 1996; Sullivan et al.”