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Modal structure and propagation of internal tides in the northeastern South China Sea
Liu, Qian2; Xie, Xiaohui1; Shang, Xiaodong2; Chen, Guiying2; Wang, Hong; xdshang@scsio.ac.cn
2019
Source PublicationACTA OCEANOLOGICA SINICA
Volume38Issue:9Pages:12
AbstractThe evolution of energy, energy flux and modal structure of the internal tides (ITs) in the northeastern South China Sea is examined using the measurements at two moorings along a cross-slope section from the deep continental slope to the shallow continental shelf. The energy of both diurnal and semidiurnal ITs clearly shows a similar to 14-day spring-neap cycle, but their phases lag that of barotropic tides, indicating that ITs are not generated on the continental slope. Observations of internal tidal energy flux suggest that they may be generated at the Luzon Strait and propagate west-northwest to the continental slope in the northwestern SCS. Because the continental slope is critical-supercritical with respect to diurnal ITs, about 4.6 kJ/m(2) of the incident energy and 8.7 kW/m of energy flux of diurnal ITs are reduced from the continental slope to the continental shelf. In contrast, the semidiurnal internal tides enter the shelf because of the sub-critical topography with respect to semidiurnal ITs. From the continental slope to the shelf, the vertical structure of diurnal ITs shows significant variation, with dominant Mode 1 on the deep slope and dominant higher modes on the shelf. On the contrary, the vertical structure of the semidiurnal ITs is stable, with dominant Mode 1.
KeywordSouth China Sea internal tides propagation scattering modal structure
Funding OrganizationState Key Laboratory of Tropical Oceanography, South China Sea Institute of Oceanology, Chinese Academy of Sciences [LTO1915]; National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [41630970, 41876016, 41676022, 41521005]; Instrument Developing Project of the CAS [YZ201432] ; State Key Laboratory of Tropical Oceanography, South China Sea Institute of Oceanology, Chinese Academy of Sciences [LTO1915]; National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [41630970, 41876016, 41676022, 41521005]; Instrument Developing Project of the CAS [YZ201432]
DOI10.1007/s13131-019-1473-1
Funding OrganizationState Key Laboratory of Tropical Oceanography, South China Sea Institute of Oceanology, Chinese Academy of Sciences [LTO1915]; National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [41630970, 41876016, 41676022, 41521005]; Instrument Developing Project of the CAS [YZ201432] ; State Key Laboratory of Tropical Oceanography, South China Sea Institute of Oceanology, Chinese Academy of Sciences [LTO1915]; National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [41630970, 41876016, 41676022, 41521005]; Instrument Developing Project of the CAS [YZ201432]
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Document Type期刊论文
Identifierhttp://ir.scsio.ac.cn/handle/344004/18227
Collection热带海洋环境国家重点实验室(LTO)
Affiliation1.Jiangsu Univ Sci & Technol, Sch Naval Architecture & Ocean Engn, Zhenjiang 212003, Jiangsu, Peoples R China
2.Minist Nat Resources, Inst Oceanog 2, State Key Lab Satellite Ocean Environm Dynam, Hangzhou 310012, Zhejiang, Peoples R China
3.Chinese Acad Sci, South China Sea Inst Oceanol, State Key Lab Trop Oceanog, Guangzhou 510301, Guangdong, Peoples R China
Recommended Citation
GB/T 7714
Liu, Qian,Xie, Xiaohui,Shang, Xiaodong,et al. Modal structure and propagation of internal tides in the northeastern South China Sea[J]. ACTA OCEANOLOGICA SINICA,2019,38(9):12, 23.
APA Liu, Qian,Xie, Xiaohui,Shang, Xiaodong,Chen, Guiying,Wang, Hong,&xdshang@scsio.ac.cn.(2019).Modal structure and propagation of internal tides in the northeastern South China Sea.ACTA OCEANOLOGICA SINICA,38(9),12.
MLA Liu, Qian,et al."Modal structure and propagation of internal tides in the northeastern South China Sea".ACTA OCEANOLOGICA SINICA 38.9(2019):12.
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