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Retrieval of the maximum horizontal current speed induced by ocean internal solitary waves from low resolution time series mooring data based on the KdV theory
Cai, Shuqun; Xu, Jiexin; Liu, Junliang; Chen, Zhiwu; Xie, Jieshuo; Li, Juan; He, Yinghui; caisq@scsio.ac.cn
2015
Source PublicationOCEAN ENGINEERING
Volume94Pages:88-93
Subtype0029-8018
AbstractInternal solitary waves (ISWs) are the nonlinear large amplitude waves existing in the oceanic pycnodine. Normally, it is difficult to obtain the maximum horizontal current speed induced by ISW since most of the passage periods of ISWs are no more than 30 min while the observational sampling interval is too low; meanwhile, to avoid power shortage of the mooring Acoustic Doppler Current Profiler-carried electric battery, oceanographers who are only concerned about the study of circulation or internal tide would choose a sampling interval of no less than 5 min. Can we use these low-time-resolution observational data to retrieve the maximum horizontal current speed induced by ISW? In this article, based on Korteweg-de Vries (KdV) equation theory (shallow-water theory), we propose a method to retrieve the maximum horizontal current speed induced by ISW. According to the calculated results based on the observational current data of ISWs near the Dongsha Islands in the northern South China Sea, it is found that, our method could well retrieve the maximum horizontal current speed induced by ISW from the low-time-resolution observational current data series, meanwhile, when the sampling interval of observational data or the ISW characteristic half-width increases, or when the ISW nonlinear phase speed decreases, the relative error of the retrieved maximum horizontal current speed will reduce. The applicability of the method to ISWs in finite-depth is also discussed. (C) 2014 Elsevier Ltd. All rights reserved.
Department[Cai, Shuqun; Xu, Jiexin; Liu, Junliang; Chen, Zhiwu; Xie, Jieshuo; Li, Juan; He, Yinghui] Chinese Acad Sci, South China Sea Inst Oceanol, State Key Lab Trop Oceanog, Guangzhou 510301, Guangdong, Peoples R China; [Xie, Jieshuo; Li, Juan] Univ Chinese Acad Sci, Beijing 100049, Peoples R China ; LTO
KeywordInternal Solitary Waves Wave-induced Current Kortweg Devries Equation Finite-depth Theory South China Sea
Subject AreaEngineering ; Oceanography
Document Type期刊论文
Identifierhttp://ir.scsio.ac.cn/handle/344004/15121
Collection热带海洋环境国家重点实验室(LTO)
Corresponding Authorcaisq@scsio.ac.cn
Recommended Citation
GB/T 7714
Cai, Shuqun,Xu, Jiexin,Liu, Junliang,et al. Retrieval of the maximum horizontal current speed induced by ocean internal solitary waves from low resolution time series mooring data based on the KdV theory[J]. OCEAN ENGINEERING,2015,94:88-93.
APA Cai, Shuqun.,Xu, Jiexin.,Liu, Junliang.,Chen, Zhiwu.,Xie, Jieshuo.,...&caisq@scsio.ac.cn.(2015).Retrieval of the maximum horizontal current speed induced by ocean internal solitary waves from low resolution time series mooring data based on the KdV theory.OCEAN ENGINEERING,94,88-93.
MLA Cai, Shuqun,et al."Retrieval of the maximum horizontal current speed induced by ocean internal solitary waves from low resolution time series mooring data based on the KdV theory".OCEAN ENGINEERING 94(2015):88-93.
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