Observation of Near-Inertial Waves Induced by Typhoon Mitag (2019) on the Southwestern East China Sea Continental Slope

doi:10.3390/jmse10020202

IOCAS-IR > 海洋环流与波动重点实验室

	Observation of Near-Inertial Waves Induced by Typhoon Mitag (2019) on the Southwestern East China Sea Continental Slope
	Ouyang, Zhiling 1,2,3; Liu, Ze 1,3,4,5; Sun, Yunfei 6; Yang, Bing1,2,3,4 ; Hou, Yijun 1,2,3,4
	2022-02-01
发表期刊	JOURNAL OF MARINE SCIENCE AND ENGINEERING
卷号	10 期号:2 页码:25
通讯作者	Hou, Yijun([email protected])
摘要	Based on horizontal velocity data recorded by a moored acoustic Doppler current profiler (ADCP) deployed on the southwestern continental slope of the East China Sea (ECS), this study investigates the characteristics of near-inertial waves (NIWs) induced by typhoon Mitag in October 2019. The results indicated that Mitag-induced near-inertial kinetic energy (NIKE) was mainly concentrated above 290 m and was subsurface-intensified; both the maximum velocity and kinetic energy of the NIWs occurred at a depth of 100 m and were 0.21 m/s and 23.01 J/m(3), respectively. The rotary vertical wavenumber spectra suggested that both downward and upward energy propagation existed. However, upward energy propagation was much smaller than downward energy propagation, mainly in the 0.007-0.014 cpm wavenumber band. The NIWs had an e-folding timescale of 9.5 days and were red-shifted as a result of the Doppler shift of the Kuroshio. Normal mode analysis suggested that the NIWs were dominated by the first and fourth baroclinic modes, which together accounted for 76.7% of the total NIKE. Spectral analysis showed that although the spectral density of the semidiurnal internal tide (M-2) peak overwhelmed that of the NIWs by a factor of approximately 30, the shear strength generated by the NIWs was comparable to that of the semidiurnal internal tide (M-2), which plays an important role in upper ocean mixing on the southwestern continental slope of the ECS. In addition, the bicoherence analysis suggested that a harmonic wave (M-2-f) was generated via the nonlinear interaction between the NIWs and semidiurnal internal tide (M-2), which reflects the energy dissipation mechanism of semidiurnal tides and NIWs on the southwestern continental slope of the ECS.
关键词	near-inertial waves typhoon Mitag East China Sea in situ observation normal mode
DOI	10.3390/jmse10020202
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China[41630967]; National Natural Science Foundation of China[41776020]; National Natural Science Foundation of China[42076002]; [NORC2020-02]
WOS研究方向	Engineering ; Oceanography
WOS类目	Engineering, Marine ; Engineering, Ocean ; Oceanography
WOS记录号	WOS:000765521400001
出版者	MDPI
引用统计	被引频次：6[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/337002/178195
专题	海洋环流与波动重点实验室
通讯作者	Hou, Yijun
作者单位	1.Chinese Acad Sci, Inst Oceanol, Key Lab Ocean Circulat & Waves, Qingdao 266071, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Chinese Acad Sci, Ctr Ocean Mega Sci, Qingdao 266071, Peoples R China 4.Qingdao Natl Lab Marine Sci & Technol, Lab Ocean & Climate Dynam, Qingdao 266237, Peoples R China 5.Harbin Engn Univ, Qingdao Innovat & Dev Base, Qingdao 266404, Peoples R China 6.Qingdao Univ, Assets & Lab Management Off, Qingdao 266071, Peoples R China
第一作者单位	海洋环流与波动重点实验室
通讯作者单位	海洋环流与波动重点实验室
推荐引用方式 GB/T 7714	Ouyang, Zhiling,Liu, Ze,Sun, Yunfei,et al. Observation of Near-Inertial Waves Induced by Typhoon Mitag (2019) on the Southwestern East China Sea Continental Slope[J]. JOURNAL OF MARINE SCIENCE AND ENGINEERING,2022,10(2):25.
APA	Ouyang, Zhiling,Liu, Ze,Sun, Yunfei,Yang, Bing,&Hou, Yijun.(2022).Observation of Near-Inertial Waves Induced by Typhoon Mitag (2019) on the Southwestern East China Sea Continental Slope.JOURNAL OF MARINE SCIENCE AND ENGINEERING,10(2),25.
MLA	Ouyang, Zhiling,et al."Observation of Near-Inertial Waves Induced by Typhoon Mitag (2019) on the Southwestern East China Sea Continental Slope".JOURNAL OF MARINE SCIENCE AND ENGINEERING 10.2(2022):25.

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