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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
    兩個呂宋深層入流口對南海北部深層環流的影響
    Received:January 21, 2020  
    DOI:10.1007/s13131-020-1621-1
    Key words:inlets  Luzon overflow  deep circulation  northern South China Sea
    中文關鍵詞:  入流口  呂宋深層入流  深層環流  南海北部
    基金項目: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層呈現顯著的氣旋式環流結構并伴有強的西邊界流,該氣旋式環流由兩個入流口進入的呂宋深層入流所驅動。本文利用逆約化重力模成功模擬了南海深層環流,緊接著利用該模式設置了一系列實驗探討南北兩個不同呂宋深層入流口對南海北部深層環流的影響。模式結果表明,兩個呂宋深層入流口的貢獻主要取決于輸入的流量大小,但北入流口比南入流口對驅動南海北部深層環流更有效。當呂宋深層入流全部從北入流口進入南海時,南海深層環流和西邊界流顯著增強;相反地,當呂宋深層入流全部從南入流口進入南海時,南海深層環流和西邊界流相應減弱,這可以用位渦守恒理論來解釋。拉格朗日軌跡模型的結果進一步表明,不同呂宋深層入流口可能對南海北部沉積物輸運有影響。
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