Evolution and breaking of a propagating internal wave in stratified ocean

IOCAS-IR > 海洋环流与波动重点实验室

	Evolution and breaking of a propagating internal wave in stratified ocean
	Li, BR ; Tian, JW ; Fan, HM ; Liu, ZU ; Zhao, Q
	2006-03-01
发表期刊	CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION
卷号	49 期号:2 页码:360-366
文章类型	Article
摘要	The processes of evolution and breaking of a propagating internal wave are directly numerically simulated using the pseudo-spectral method. The mechanism of PSI (parametric subharmonic instability) involved in the evolution is testified clearly, which dominates gradually in nonlinear resonant interactions. As a consequence, the energy cascades to a second plant wave packet with low frequencies and higher wavenumbers with respect to the primary wave. With the growth of this wave packet, wave breaking occurs and causes strong nonlinear regime, i.e. stratified turbulence. The strong mixing and intermittent of the turbulence can be learned from the evolution of the total energy and kurtosis of vorticity vs. time. Some statistic properties of the stratified turbulence are analyzed, including the spectra of KE (kinetic energy) and APE (effective potential energy) along vertical wavenumber k(y). The results show that these spectra display a wavenumber range scaling as 0.1 N-4 k(y)(-3) and 0.2 N-4 k(y)(-3), respectively (N is the Brunt-Vaisala frequency), which is called buoyancy sub-range. The Cox number of diapycnal diffusivity is also calculated, and it shows a good consistency with the observations and deductions in ocean interiors during the stage of the stratified turbulence maintaining a fairly active level.
关键词	Internal Wave Breaking Pseudo-spectral Method Buoyancy Sub-range Cox Number
收录类别	SCI
语种	英语
WOS记录号	WOS:000236382000008
引用统计	被引频次：1[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.qdio.ac.cn/handle/337002/32569
专题	海洋环流与波动重点实验室
作者单位	1.Ocean Univ China, Inst Phys Oceanog, Qingdao 266003, Peoples R China 2.State Ocean Adm, Key Lab Marine Sci & Numer Modeling, Qingdao 266061, Peoples R China 3.Chinese Acad Sci, Inst Oceanol, Qingdao 266071, Peoples R China
推荐引用方式 GB/T 7714	Li, BR,Tian, JW,Fan, HM,et al. Evolution and breaking of a propagating internal wave in stratified ocean[J]. CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,2006,49(2):360-366.
APA	Li, BR,Tian, JW,Fan, HM,Liu, ZU,&Zhao, Q.(2006).Evolution and breaking of a propagating internal wave in stratified ocean.CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,49(2),360-366.
MLA	Li, BR,et al."Evolution and breaking of a propagating internal wave in stratified ocean".CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION 49.2(2006):360-366.

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Evolution and breaki（336KB）	期刊论文	出版稿	限制开放	ODC PDDL	浏览