Internal Waves Generated by Tidal Flows over a Triangular Ridge with Critical Slopes
文献类型：期刊论文
| 作者 | Nie Yuhua; Chen Zhiwu1; Xie Jieshuo1; Xu Jiexin1; He Yinghui1; Cai Shuqun1,2,4; zhiwuchen@scsio.ac.cn; caisq@scsio.ac.cn |
| 刊名 | JOURNAL OF OCEAN UNIVERSITY OF CHINA
 |
| 出版日期 | 2019 |
| 卷号 | 18期号:5页码:1005 |
| 关键词 | Internal wave beam parametric subharmonic instability internal wave energetics tide-topography interaction |
| DOI | 10.1007/s11802-019-3985-4 |
| 英文摘要 | Direct numerical simulations are performed to investigate the generation of internal waves by tide-topography interaction in a lab-scale model. The bottom topography is a triangular ridge with two critical slopes. With increasing tidal forcing, subhar-monic instabilities are identified, which cause internal wave beams to become unstable and turbulent. Kinetic energy densities in the upward going beams from the ridge top are stronger than those from the ridge bottom, whereas the reverse is true for the energy flux. This disparity between energy and energy flux is due to the existence of strong pressure disturbances near the ridge bottom. On each side of the critical ridge, there exists an amphidromic point, from which internal wave beams are emitted in opposite directions. The calculated energy conversion rate scales linearly with the square of the forcing amplitude and agrees within 13% of theoretical prediction, even when turbulence occurs. The fraction of radiated baroclinic energy becomes saturated in the range of low excursion parameter considered, which agrees with the behavior in large-scale systems wherein mixing parameterizations must be used. The present work enriches the studies on the generation of internal waves over a critical triangular ridge. |
| 资助机构 | Key Research Program of Frontier Sciences, CAS [QYZDJ-SSW-DQC034]; National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [41430964, 41521005, 41776007, 41506005]; Pearl River S&T Nova Program of Guangzhou [201610010012]; Youth Innovation Promotion Association CAS [2018378]; CASDefence Research & Development Organisation (DRDO)Chinese Academy of Sciences [ISEE2018PY05] ; Key Research Program of Frontier Sciences, CAS [QYZDJ-SSW-DQC034]; National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [41430964, 41521005, 41776007, 41506005]; Pearl River S&T Nova Program of Guangzhou [201610010012]; Youth Innovation Promotion Association CAS [2018378]; CASDefence Research & Development Organisation (DRDO)Chinese Academy of Sciences [ISEE2018PY05] |
| 源URL | [http://ir.scsio.ac.cn/handle/344004/18222]  |
| 专题 | 南海海洋研究所_热带海洋环境国家重点实验室(LTO) |
| 作者单位 | 1.South China Sea Informat Ctr, State Ocean Adm, Guangzhou 510310, Guangdong, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Chinese Acad Sci, Inst South China Sea Ecol & Environm Engn, Guangzhou 510301, Guangdong, Peoples R China 4.Chinese Acad Sci, South China Sea Inst Oceanol, State Key Lab Trop Oceanog, Guangzhou 510301, Guangdong, Peoples R China |
| 推荐引用方式 GB/T 7714 | Nie Yuhua,Chen Zhiwu,Xie Jieshuo,et al. Internal Waves Generated by Tidal Flows over a Triangular Ridge with Critical Slopes[J]. JOURNAL OF OCEAN UNIVERSITY OF CHINA,2019,18(5):1005, 1012. |
| APA | Nie Yuhua.,Chen Zhiwu.,Xie Jieshuo.,Xu Jiexin.,He Yinghui.,...&caisq@scsio.ac.cn.(2019).Internal Waves Generated by Tidal Flows over a Triangular Ridge with Critical Slopes.JOURNAL OF OCEAN UNIVERSITY OF CHINA,18(5),1005. |
| MLA | Nie Yuhua,et al."Internal Waves Generated by Tidal Flows over a Triangular Ridge with Critical Slopes".JOURNAL OF OCEAN UNIVERSITY OF CHINA 18.5(2019):1005. |
入库方式： OAI收割
来源：南海海洋研究所
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