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Zhou Muping,Chen Changlin,Yan Yunwei,Liu Wenhu. 2020. Influence of two inlets of the Luzon overflow on the deep circulation in the northern South China Sea. Acta Oceanologica Sinica, 39(11):13-20
Influence of two inlets of the Luzon overflow on the deep circulation in the northern South China Sea
两个吕宋深层入流口对南海北部深层环流的影响
Received:January 21, 2020  
DOI:10.1007/s13131-020-1621-1
Key words:inlets  Luzon overflow  deep circulation  northern South China Sea
中文关键词:  入流口  吕宋深层入流  深层环流  南海北部
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.
Author NameAffiliationE-mail
Zhou Muping College of Ocean and Earth Science, Xiamen University, Xiamen 361102, China
Department of Atmospheric and Oceanic Sciences & Institute of Atmospheric Sciences, Fudan University, Shanghai 200438, China
State Key Laboratory of Satellite Ocean Environment Dynamics, Second Institute of Oceanography, Ministry of Natural Resources, Hangzhou 310012, China 
 
Chen Changlin Department of Atmospheric and Oceanic Sciences & Institute of Atmospheric Sciences, Fudan University, Shanghai 200438, China
Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Zhuhai 519000, China 
chencl@fudan.edu.cn 
Yan Yunwei State Key Laboratory of Satellite Ocean Environment Dynamics, Second Institute of Oceanography, Ministry of Natural Resources, Hangzhou 310012, China
Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Zhuhai 519000, China 
 
Liu Wenhu Department of Atmospheric and Oceanic Sciences & Institute of Atmospheric Sciences, Fudan University, Shanghai 200438, China  
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Abstract:
      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.
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。
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