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学科主题: Geosciences, Multidisciplinary
题名: Variations of diurnal and inertial spectral peaks near the bi-diurnal critical latitude
作者: Xie, XH ; Shang, XD ; Chen, GY ; Sun, L
通讯作者: xdshang@scsio.ac.cn
刊名: GEOPHYSICAL RESEARCH LETTERS
发表日期: 2009
卷: 36, 页:-
收录类别: sci
部门归属: [Xie, Xiao-Hui; Shang, Xiao-Dong; Chen, Gui-Ying; Sun, Lu] Chinese Acad Sci, Marine Observat & Res Lab, S China Sea Inst Oceanol, Guangzhou 510301, Guangdong, Peoples R China; [Xie, Xiao-Hui] Chinese Acad Sci, Grad Univ, Beijing, Peoples R China
项目归属: LED
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.
原文出处: 查看原文
WOS记录号: WOS:000262981800006
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内容类型: 期刊论文
URI标识: http://ir.scsio.ac.cn/handle/344004/6173
Appears in Collections:热带海洋环境动力实验室(LTO)_期刊论文

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Xie, XH; Shang, XD; Chen, GY; Sun, L.Variations of diurnal and inertial spectral peaks near the bi-diurnal critical latitude,GEOPHYSICAL RESEARCH LETTERS,2009,36():-
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