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Characteristics and seasonal variability of internal tides in the southern South China Sea
Shang, Xiaodong; Liu, Qian; Xie, Xiaohui; Chen, Guiying; Chen, Rongyu; xdshang@scsio.ac.cn
2015
Source PublicationDEEP-SEA RESEARCH PART I-OCEANOGRAPHIC RESEARCH PAPERS
Volume98Pages:43-52
Subtype0967-0637
AbstractTwo sets of current mooring records at the same location are used to investigate the generation and temporal variation of internal tides (ITs) near reefs in the southern South China Sea (SCS). The total records covered more than 900 days. ITs in this region are dominated by mode-1 diurnal motions, which are mainly composed of O-1, P-1 and K-1 constituents. The major axes of both diurnal barotropic and baroclinic tidal ellipses are oriented in the northeast-southwest direction. The ifs over the entire observation period clearly show an approximately 14-day spring-neap cycle. Meanwhile, the diurnal ITs also displayed an evident seasonal change: their energy was higher in summer and winter than in spring and autumn. The modal decomposition of diurnal motion shows that their time-averaged kinetic energy in summer and winter was about 1.2 kJ/m(2), which was approximately 60% higher than the values in spring and autumn. The same seasonal variation also occurred at the diurnal barotropic tides with prominent O-1, P-1 and K-1 constituents. Because stratification does not show a significant seasonal variation in the southern SCS, the enhanced diurnal ITs in winter and summer can be attributed to the barotropic forcing with the semi-annual cycle caused by the modulation of diurnal P-1 and K-1. (C) 2014 Elsevier Ltd. All rights reserved.
Department[Shang, Xiaodong; Liu, Qian; Xie, Xiaohui; Chen, Guiying; Chen, Rongyu] Chinese Acad Sci, South China Sea Inst Oceanol, State Key Lab Trop Oceanog, Guangzhou 510301, Guangdong, Peoples R China; [Liu, Qian] Univ Chinese Acad Sci, Beijing, Peoples R China ; LTO
KeywordInternal Tides Seasonal Variation South China Sea
Subject AreaOceanography
Document Type期刊论文
Identifierhttp://ir.scsio.ac.cn/handle/344004/15107
Collection热带海洋环境国家重点实验室(LTO)
Corresponding Authorxdshang@scsio.ac.cn
Recommended Citation
GB/T 7714
Shang, Xiaodong,Liu, Qian,Xie, Xiaohui,et al. Characteristics and seasonal variability of internal tides in the southern South China Sea[J]. DEEP-SEA RESEARCH PART I-OCEANOGRAPHIC RESEARCH PAPERS,2015,98:43-52.
APA Shang, Xiaodong,Liu, Qian,Xie, Xiaohui,Chen, Guiying,Chen, Rongyu,&xdshang@scsio.ac.cn.(2015).Characteristics and seasonal variability of internal tides in the southern South China Sea.DEEP-SEA RESEARCH PART I-OCEANOGRAPHIC RESEARCH PAPERS,98,43-52.
MLA Shang, Xiaodong,et al."Characteristics and seasonal variability of internal tides in the southern South China Sea".DEEP-SEA RESEARCH PART I-OCEANOGRAPHIC RESEARCH PAPERS 98(2015):43-52.
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