Institutional Repository of Key Laboratory of Ocean Circulation and Wave Studies, Institute of Oceanology, Chinese Academy of Sciences
| Observation of Near-Inertial Waves Induced by Typhoon Mitag (2019) on the Southwestern East China Sea Continental Slope | |
Ouyang, Zhiling1,2,3; Liu, Ze1,3,4,5; Sun, Yunfei6; Yang, Bing1,2,3,4 ; Hou, Yijun1,2,3,4
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| 2022-02-01 | |
| Source Publication | JOURNAL OF MARINE SCIENCE AND ENGINEERING
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| Volume | 10Issue:2Pages:25 |
| Corresponding Author | Hou, Yijun(yjhou@qdio.ac.cn) |
| Abstract | 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. |
| Keyword | near-inertial waves typhoon Mitag East China Sea in situ observation normal mode |
| DOI | 10.3390/jmse10020202 |
| Indexed By | SCI |
| Language | 英语 |
| Funding Project | National Natural Science Foundation of China[41630967] ; National Natural Science Foundation of China[41776020] ; National Natural Science Foundation of China[42076002] ; [NORC2020-02] |
| WOS Research Area | Engineering ; Oceanography |
| WOS Subject | Engineering, Marine ; Engineering, Ocean ; Oceanography |
| WOS ID | WOS:000765521400001 |
| Publisher | MDPI |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.qdio.ac.cn/handle/337002/178195 |
| Collection | 海洋环流与波动重点实验室 |
| Corresponding Author | Hou, Yijun |
| Affiliation | 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 |
| First Author Affilication | Key Laboratory of Ocean Circulation and Wave Studies, Institute of Oceanology, Chinese Academy of Sciences |
| Corresponding Author Affilication | Key Laboratory of Ocean Circulation and Wave Studies, Institute of Oceanology, Chinese Academy of Sciences |
| Recommended Citation 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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