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    Bai Peng,Ling Zheng,Liu Cong,Wu Junshan,Xie Lingling. 2020. Effects of tidal currents on winter wind waves in the Qiongzhou Strait: a numerical study. Acta Oceanologica Sinica, 39(11):33-43
    Effects of tidal currents on winter wind waves in the Qiongzhou Strait: a numerical study
    瓊州海峽內潮流場對冬季風浪場影響的數值研究
    Received:April 30, 2020  
    DOI:10.1007/s13131-020-1673-2
    Key words:Qiongzhou Strait  COAWST  significant wave height  peak wave direction
    中文關鍵詞:  瓊州海峽  COAWST  有效波高  譜峰波向
    基金項目:The Fund of Southern Marine Science and Engineering Guangdong Laboratory (Zhanjiang) under contract No. ZJW-2019-08; the Program for Scientific Research Start-up Funds of Guangdong Ocean University under contract No. 101302/R18001; the National Natural Science Foundation of China under contract No. 41776034; the First-class Discipline Plan of Guangdong Province under contract No. CYL231419012.
    Author NameAffiliationE-mail
    Bai Peng Marine Resources Big Data Center of South China Sea, Southern Marine Science and Engineering Guangdong Laboratory (Zhanjiang), Zhanjiang 524025, China
    Guangdong Province Key Laboratory for Coastal Ocean Variation and Disaster Prediction, College of Ocean and Meteorology, Guangdong Ocean University, Zhanjiang 524088, China 
     
    Ling Zheng Guangdong Province Key Laboratory for Coastal Ocean Variation and Disaster Prediction, College of Ocean and Meteorology, Guangdong Ocean University, Zhanjiang 524088, China  
    Liu Cong Ocean College, Zhejiang University, Zhoushan 316021, China liucong175@gmail.com 
    Wu Junshan East China Sea Bureau of Ministry of Natural Resources, Shanghai 200137, China  
    Xie Lingling Marine Resources Big Data Center of South China Sea, Southern Marine Science and Engineering Guangdong Laboratory (Zhanjiang), Zhanjiang 524025, China
    Guangdong Province Key Laboratory for Coastal Ocean Variation and Disaster Prediction, College of Ocean and Meteorology, Guangdong Ocean University, Zhanjiang 524088, China 
     
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    Abstract:
          Effects of currents on winter wind waves in the tide-dominated Qiongzhou Strait (QS) were numerically evaluated via employing the coupled ocean-atmosphere-wave-sediment transport (COAWST) modeling system. Validations showed satisfactory model performance in simulating the intense tidal currents in the QS. Different effects of sea level variations and tidal currents on waves were examined under the maximum eastward (METC) and westward (MWTC) tidal currents. In the east entrance area of the QS, the positive sea levels under the MWTC deepened the water depth felt by waves, benefiting the further propagation of wave energy into the inner strait and causing increased wave height. The METC and the MWTC could both enhance the wave height in the east entrance area of the QS, mainly through current-induced convergence and wavenumber shift, respectively. By current-induced refraction, the METC (MWTC) triggered counterclockwise (clockwise) rotation in peak wave directions in the northern part of the QS while clockwise (counterclockwise) rotation in the southern part.
    中文摘要:
          利用COAWST數值模式就瓊州海峽內潮流場對冬季風浪場的影響進行了研究。經實測數據驗證,模型可較好的刻畫海峽內的強潮流場。選定東、西向最大潮流時刻為典型案例分別就水位場及潮流場對波浪場的作用展開探討。在瓊州海峽東口處,西向最大潮流時刻下的正水位場增加了承載波浪運動的有效水深,有利于波浪能量的西向傳播,進而使得當地有效波高增加。東、西向最大潮流均有利于瓊州海峽東口處有效波高的增大,但前者主要通過流致輻聚效應實現,而后者主要經由流致波數位移生效。通過流致折射作用,東向(西向)最大潮流可在海峽中軸線以北的海區引起譜峰波向的逆時針(順時針)旋轉,而在以南的海區觸發順時針(逆時針)旋轉。
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