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Zhou Muping,Chen Changlin,Yan Yunwei,Liu Wenhu.Influence of two inlets of the Luzon overflow on the deep circulation in the northern South China Sea[J].Acta Oceanologica Sinica,2020,39(11):13-20
两个吕宋深层入流口对南海北部深层环流的影响
Influence of two inlets of the Luzon overflow on the deep circulation in the northern South China Sea
投稿时间:2020-01-21  
DOI:10.1007/s13131-020-1621-1
中文关键词:  入流口  吕宋深层入流  深层环流  南海北部
英文关键词:inlets  Luzon overflow  deep circulation  northern South China Sea
基金项目:The Foundation of China Ocean Mineral Resources R&D Association under contract No. DY135-E2-2-02; the National Natural Science Foundation of China under contract Nos 91428206, 41976028 and 41806019.
作者单位E-mail
周木平 厦门大学海洋与地球学院厦门361102
复旦大学大气与海洋科学系/大气科学研究院
上海200438
卫星海洋环境动力学国家重点实验室
自然资源部第二海洋研究所杭州310012 
 
陈长霖 复旦大学大气与海洋科学系/大气科学研究院上海200438
南方海洋科学与工程广东省实验室(珠海)珠海519000 
chencl@fudan.edu.cn 
闫运伟 卫星海洋环境动力学国家重点实验室自然资源部第二海洋研究所杭州310012
南方海洋科学与工程广东省实验室(珠海)珠海519000 
 
刘文虎 复旦大学大气与海洋科学系/大气科学研究院上海200438  
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中文摘要:
      前人研究表明南海深层呈现显著的气旋式环流结构并伴有强的西边界流,该气旋式环流由两个入流口进入的吕宋深层入流所驱动。本文利用逆约化重力模成功模拟了南海深层环流,紧接着利用该模式设置了一系列实验探讨南北两个不同吕宋深层入流口对南海北部深层环流的影响。模式结果表明,两个吕宋深层入流口的贡献主要取决于输入的流量大小,但北入流口比南入流口对驱动南海北部深层环流更有效。当吕宋深层入流全部从北入流口进入南海时,南海深层环流和西边界流显著增强;相反地,当吕宋深层入流全部从南入流口进入南海时,南海深层环流和西边界流相应减弱,这可以用位涡守恒理论来解释。拉格朗日轨迹模型的结果进一步表明,不同吕宋深层入流口可能对南海北部沉积物输运有影响。
英文摘要:
      An inverse reduced-gravity model is used to simulate the deep South China Sea (SCS) circulation. A set of experiments are conducted using this model to study the influence of the Luzon overflow through the two inlets on the deep circulation in the northern SCS. Model results suggest that the relative contribution of these inlets largely depends on the magnitude of the input transport of the overflow, but the northern inlet is more efficient than the southern inlet in driving the deep circulation in the northern SCS. When all of the Luzon overflow occurs through the northern inlet the deep circulation in the northern SCS is enhanced. Conversely, when all of the Luzon overflow occurs through the southern inlet the circulation in the northern SCS is weakened. A Lagrangian trajectory model is also developed and applied to these cases. The Lagrangian results indicate that the location of the Luzon overflow likely has impacts upon the sediment transport into the northern SCS.
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