文献类型：期刊文献

英文题名：Modeling of the eddy viscosity by breaking waves

作者：Mang Shuwen;Yuan Yeli[2];Zheng Quanan[3]

机构：[1]Guangdong Ocean Univ, S China Sea Environm Inst, Zhanjiang 524088, Peoples R China;[2]Inst Oceanog State Ocean Adm 1, Key Lab Marine Sci & Numer Modeling State Ocean A, Qingdao 266061, Peoples R China;[3]Univ Maryland, Dept Meteorol, College Pk, MD 20742 USA

年份：2007

卷号：26

期号：6

起止页码：116

外文期刊名：ACTA OCEANOLOGICA SINICA

收录：SCI-EXPANDED(收录号：WOS:000252472300012)、、Scopus(收录号：2-s2.0-38849133449)、WOS

语种：英文

外文关键词：air-sea interface; near-surface dynamics; TKE dissipation rate; eddy viscosity

外文摘要：Breaking 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.