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Modeling of the eddy viscosity by breaking waves
Mang, SW; Yeli, Y; Quanan, M;
AbstractBreaking wave induced nearsurface turbulence has important consequences for many physical and biochemical processes including water column and nutrients mixing, heat and gases exchange across air-sea interface. The energy loss from wave breaking and the bubble plume penetration depth are estimated. As a consequence, the vertical distribution of the turbulent kinetic energy (TKE), the TKE dissipation rate and the eddy viscosity induced by wave breaking are also provided. It is indicated that model results are found to be consistent with the observational evidence that most TKE generated by wave breaking is lost within a depth of a few meters near the sea surface. High turbulence level with intensities of eddy viscosity induced by breaking is nearly four orders larger than u(w1) ( = ku (*w)z), the value predicted for the wall layer scaling close to the surface, where u(*w) is the friction velocity in water, K with 0.4 is the von Karman constant, and z is the water depth, and the strength of the eddy viscosity depends both on wind speed and sea state, and decays rapidly through the depth. This leads to the conclusion that the breaking wave induced vertical mixing is mainly limited to the near surface layer, well above the classical values expected from the similarity theory. Deeper down, however, the effects of wave breaking on the vertical mixing become less important.
DepartmentGuangdong Ocean Univ, S China Sea Environm Inst, Zhanjiang 524088, Peoples R China; [Yuan Yeli] Inst Oceanog State Ocean Adm 1, Key Lab Marine Sci & Numer Modeling State Ocean A, Qingdao 266061, Peoples R China; [Zheng Quanan] Univ Maryland, Dept Meteorol, College Pk, MD 20742 USA
KeywordAir-sea Interface Near-surface Dynamics Tke Dissipation Rate Eddy Viscosity
Subject AreaOceanography
Indexed Bysci
Funding Project海洋地质
Document Type期刊论文
Recommended Citation
GB/T 7714
Mang, SW,Yeli, Y,Quanan, M,et al. Modeling of the eddy viscosity by breaking waves[J]. ACTA OCEANOLOGICA SINICA,2007,26(6):116-123.
APA Mang, SW,Yeli, Y,Quanan, M,& of the eddy viscosity by breaking waves.ACTA OCEANOLOGICA SINICA,26(6),116-123.
MLA Mang, SW,et al."Modeling of the eddy viscosity by breaking waves".ACTA OCEANOLOGICA SINICA 26.6(2007):116-123.
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