IOCAS-IR  > 海洋环流与波动重点实验室
Observed near-inertial waves in the wake of Typhoon Hagupit in the northern South China Sea
Yang Bing1,2,3; Hou Yijun1,2; Hu Po1,2
2015-09-01
发表期刊CHINESE JOURNAL OF OCEANOLOGY AND LIMNOLOGY
卷号33期号:5页码:1265-1278
文章类型Article
摘要Energetic near-inertial internal waves (NIWs) were observed on the continental slope of the northern South China Sea in September 2008. Characteristics of the observed near-inertial waves were examined based on current data recorded by a moored acoustic Doppler current profiler. Results of a simple slab model indicated that the NIWs were generated by the surface winds of Typhoon Hagupit. Following Hagupit's passage, the wave field was dominated by baroclinic NIWs. The near-inertial currents were surface-intensified with a maximum of 0.52 m/s but still reached 0.1 m/s at the depth of 210 m. Moreover, the near-inertial currents were clockwise-polarized and slightly elliptical. A depth-leading phase of the near-inertial currents was evident, which indicated downward energy propagation. However, the rotary vertical wavenumber spectra suggested that upward energy propagation also existed, which was consistent previous theoretical study. The frequency of the NIWs, modified by the positive background vorticity, was 0.714 2 cycles per day, which was 0.02 f (0) higher than the local inertial frequency (f (0)). The near-inertial kinetic energy evolved exponentially and had an e-folding timescale of about 3 days. The vertical phase and group velocity were estimated to be 10 and 2.1 m/h, respectively, corresponding to a vertical wavelength of 340 m. The NIWs were dominated by the second mode with a variance contribution of > 50%, followed by the third mode, while the first mode was insignificant.
关键词Near-inertial Internal Waves South China Sea Typhoon Hagupit
DOI10.1007/s00343-015-4254-z
收录类别SCI
语种英语
WOS记录号WOS:000360846900017
引用统计
被引频次:2[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/337002/50636
专题海洋环流与波动重点实验室
作者单位1.Chinese Acad Sci, Inst Oceanol, Qingdao 266071, Peoples R China
2.Chinese Acad Sci, Inst Oceanol, Ocean Circulat & Waves, Key Lab, Qingdao 266071, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
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Yang Bing,Hou Yijun,Hu Po. Observed near-inertial waves in the wake of Typhoon Hagupit in the northern South China Sea[J]. CHINESE JOURNAL OF OCEANOLOGY AND LIMNOLOGY,2015,33(5):1265-1278.
APA Yang Bing,Hou Yijun,&Hu Po.(2015).Observed near-inertial waves in the wake of Typhoon Hagupit in the northern South China Sea.CHINESE JOURNAL OF OCEANOLOGY AND LIMNOLOGY,33(5),1265-1278.
MLA Yang Bing,et al."Observed near-inertial waves in the wake of Typhoon Hagupit in the northern South China Sea".CHINESE JOURNAL OF OCEANOLOGY AND LIMNOLOGY 33.5(2015):1265-1278.
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