Variations of diurnal and inertial spectral peaks near the bi-diurnal critical latitude

CORC > 南海海洋研究所 > 中国科学院南海海洋研究所 > 热带海洋环境国家重点实验室(LTO)

	Variations of diurnal and inertial spectral peaks near the bi-diurnal critical latitude
	Xie, XH ; Shang, XD ; Chen, GY ; Sun, L
刊名	GEOPHYSICAL RESEARCH LETTERS
	2009
卷号	36 页码:-
ISSN号	0094-8276
通讯作者	xdshang@scsio.ac.cn
中文摘要	Three sets of ADCP data obtained from the upper ocean are used to examine possible influence of parametric subharmonic instability (PSI) at phi(c) approximate to 13 - 15 degrees N. Both kinetic-energy and shear spectra at phi(c) reveal that significant peaks appear at subharmonic frequencies of diurnal internal tides. Especially, the 0.5 K-1 (subharmonic of K-1 tides) can be trapped poleward of its critical latitude (14.52 degrees N), significantly distinguished from wind generated near-inertial internal waves. Moreover, the enhanced 0.5 K-1 motions are more or less subject to a fortnightly spring-neap circle. Relative to a higher latitude (say 18 degrees N), diurnal motions at phi(c) are greatly weakened. In contrast, small vertical-scale motions in the inertial band and the shear induced by these motions are significantly enhanced. Likely, PSI mechanism plays an important role in these observations, whilst trapped sub-inertial waves (0.5 K-1) may be associated with the presence of negative sub-inertial eddies. Citation: Xie, X.-H., X.-D. Shang, G.-Y. Chen, and L. Sun (2009), Variations of diurnal and inertial spectral peaks near the bi-diurnal critical latitude, Geophys. Res. Lett., 36, L02606, doi: 10.1029/2008GL036383.
学科主题	Geosciences, Multidisciplinary
收录类别	SCI
原文出处	AMER GEOPHYSICAL UNION
WOS记录号	WOS:000262981800006
公开日期	2011-07-03
内容类型	期刊论文
源URL	[http://ir.scsio.ac.cn/handle/344004/6173]
专题	南海海洋研究所_热带海洋环境国家重点实验室(LTO)
推荐引用方式 GB/T 7714	Xie, XH,Shang, XD,Chen, GY,et al. Variations of diurnal and inertial spectral peaks near the bi-diurnal critical latitude[J]. GEOPHYSICAL RESEARCH LETTERS,2009,36:-.
APA	Xie, XH,Shang, XD,Chen, GY,&Sun, L.(2009).Variations of diurnal and inertial spectral peaks near the bi-diurnal critical latitude.GEOPHYSICAL RESEARCH LETTERS,36,-.
MLA	Xie, XH,et al."Variations of diurnal and inertial spectral peaks near the bi-diurnal critical latitude".GEOPHYSICAL RESEARCH LETTERS 36(2009):-.