| Yang Jingling,Jiang Shaocai,Wu Junshan,Xie Lingling,Zhang Shuwen,Bai Peng. 2020. Effects of wave-current interaction on the waves, cold-water mass and transport of diluted water in the Beibu Gulf. Acta Oceanologica Sinica, 39(1):25－40 |
| Effects of wave-current interaction on the waves, cold-water mass and transport of diluted water in the Beibu Gulf |
| 浪流相互作用对北部湾内波浪、冷水团及冲淡水的影响研究 |
| Received:December 19, 2018 |
| DOI：10.1007/s13131-019-1529-9 |
| Key words:wave-current interaction Beibu Gulf river plume cold-water mass COAWST |
| 中文关键词: 浪流相互作用 北部湾 河口羽流 冷水团 COAWST |
| 基金项目:The Program for Scientific Research Start-up Funds of Guangdong Ocean University under contract No. 101302/R18001; the Fund of Southern Marine Science and Engineering Guangdong Laboratory (Zhanjiang) under contract No. ZJW-2019-08; the National Key Research and Development Program of China under contract No. 2016YFC1401403; the National Natural Science Foundation of China under contract Nos 41476009 and 41776034. |
| Author Name | Affiliation | E-mail | | Yang Jingling | Guangdong Province Key Laboratory for Coastal Ocean Variation and Disaster Prediction, College of Ocean and Meteorology, Guangdong Ocean University, Zhanjiang 524088, China
Marine Resources Big Data Center of South China Sea, Southern Marine Science and Engineering Guangdong Laboratory (Zhanjiang), Zhanjiang 524025, China | | | Jiang Shaocai | Beihai Marine Environmental Monitoring Center, South China Sea Bureau of Ministry of Natural Resources, Beihai 536000, China | | | Wu Junshan | East China Sea Bureau of Ministry of Natural Resources, Shanghai 200137, China | | | Xie Lingling | Guangdong Province Key Laboratory for Coastal Ocean Variation and Disaster Prediction, College of Ocean and Meteorology, Guangdong Ocean University, Zhanjiang 524088, China
Marine Resources Big Data Center of South China Sea, Southern Marine Science and Engineering Guangdong Laboratory (Zhanjiang), Zhanjiang 524025, China | | | Zhang Shuwen | Institute of Marine Science, College of Science, Shantou University, Shantou 515063, China | | | Bai Peng | Guangdong Province Key Laboratory for Coastal Ocean Variation and Disaster Prediction, College of Ocean and Meteorology, Guangdong Ocean University, Zhanjiang 524088, China
Marine Resources Big Data Center of South China Sea, Southern Marine Science and Engineering Guangdong Laboratory (Zhanjiang), Zhanjiang 524025, China | baip@gdou.edu.cn |
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| Abstract: |
| Wave-current interaction and its effects on the hydrodynamic environment in the Beibu Gulf (BG) have been investigated via employing the Coupled Ocean-Atmosphere-Wave-Sediment Transport (COAWST) modeling system. The model could simulate reasonable hydrodynamics in the BG when validated by various observations. Vigorous tidal currents refract the waves efficiently and make the seas off the west coast of Hainan Island be the hot spot where currents modulate the significant wave height dramatically. During summer, wave-enhanced bottom stress could weaken the near-shore component of the gulf-scale cyclonic-circulation in the BG remarkably, inducing two major corresponding adjustments:Model results reveal that the deep-layer cold water from the southern BG makes critical contribution to maintaining the cold-water mass in the northern BG Basin. However, the weakened background circulation leads to less cold water transported from the southern gulf to the northern gulf, which finally triggers a 0.2℃ warming in the cold-water mass area; In the top areas of the BG, the suppressed background circulation reduces the transport of the diluted water to the central gulf. Therefore, more freshwater could be trapped locally, which then triggers lower sea surface salinity (SSS) in the near-field and higher SSS in the far-field. |
| 中文摘要: |
| 利用COAWST数值模式就浪流相互作用对北部湾内水动力环境的影响进行了探讨，经多源实测数据验证，模型可较好的模拟北部湾内水动力特征。在海南岛西岸近海，强烈的潮流可对波浪产生有效的折射，从而显著影响当地的有效波高。夏季，波浪增强的底摩擦应力可削弱湾内气旋式环流的近岸部分，引发两处显著的水动力调整：模拟结果表明来自湾南的深层冷水对位于湾北的冷水团起关键的维持作用，然而，被抑制的背景环流致使自湾南输运至湾北的冷水量减少，进而引发冷水团区约0.2℃ 的增温；在湾顶海区，被削弱的背景环流不利于湾顶冲淡水的向外扩展，更多的淡水被困于河口附近，最终使得河口近场海表面盐度降低而远场海表面盐度升高。 |
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