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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
琼州海峡内潮流场对冬季风浪场影响的数值研究
Received:April 30, 2020  
DOI:10.1007/s13131-020-1673-2
Key words:Qiongzhou Strait  COAWST  significant wave height  peak wave direction
中文关键词:  琼州海峡  COAWST  有效波高  谱峰波向
基金项目: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数值模式就琼州海峡内潮流场对冬季风浪场的影响进行了研究。经实测数据验证,模型可较好的刻画海峡内的强潮流场。选定东、西向最大潮流时刻为典型案例分别就水位场及潮流场对波浪场的作用展开探讨。在琼州海峡东口处,西向最大潮流时刻下的正水位场增加了承载波浪运动的有效水深,有利于波浪能量的西向传播,进而使得当地有效波高增加。东、西向最大潮流均有利于琼州海峡东口处有效波高的增大,但前者主要通过流致辐聚效应实现,而后者主要经由流致波数位移生效。通过流致折射作用,东向(西向)最大潮流可在海峡中轴线以北的海区引起谱峰波向的逆时针(顺时针)旋转,而在以南的海区触发顺时针(逆时针)旋转。
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