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Volume 28 Issue 6

Nov.  2011

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Article >  ADVANCES IN ATMOSPHERIC SCIENCES  > 2011 >  28(6): 1367-1376

Impact of the South China Sea Throughflow on the Pacific Low-Latitude Western Boundary Current: A Numerical Study for Seasonal and Interannual Time Scales

  • 1.

    State Key Laboratory of Tropical Oceanography, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, Guy Carpenter Asia-Pacific Climate Impact Centre, School of Energy and Environment, City University of Hong Kong, Hong Kong,State Key Laboratory of Tropical Oceanography, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301,Guy Carpenter Asia-Pacific Climate Impact Centre, School of Energy and Environment, City University of Hong Kong, Hong Kong,State Key Laboratory of Tropical Oceanography, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301,State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029,State Key Laboratory of Tropical Oceanography, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301,State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029


doi: 10.1007/s00376-011-0142-4

  • Prior studies have revealed that, as a part of the Pacific tropical gyre, the South China Sea throughflow (SCSTF) is strongly influenced by the Pacific low-latitude western boundary current (LLWBC). In this study, ocean general circulation model (OGCM) experiments with and without connection to the South China Sea (SCS) were performed to investigate the impact of the SCSTF on the Pacific LLWBC. These model experiments show that if the SCS is blocked, seasonal variability of the Kuroshio and Mindanao Current becomes stronger, and the meridional migration of the North Equatorial Current (NEC) bifurcation latitude is enhanced. Both in seasonal and interannual time scales, stronger Luzon Strait transport (LST) induces a stronger Kuroshio transport combined with a southward shift of the NEC bifurcation, which is unfavorable for a further increase of the LST; a weaker LST induces a weaker Kuroshio transport and a northward shifting NEC bifurcation, which is also unfavorable for the continuous decrease of the LST.
  • [1] Wansuo DUAN, Xixi WEN, 2019: Errors in Current Velocity in the Low-latitude North Pacific: Results from the Regional Ocean Modeling System, ADVANCES IN ATMOSPHERIC SCIENCES, 36, 397-416.  doi: 10.1007/s00376-018-8140-4
    [2] LIU Qinyan, Ruixin HUANG, WANG Dongxiao, 2012: Implication of the South China Sea Throughflow for the Interannual Variability of the Regional Upper-Ocean Heat Content, ADVANCES IN ATMOSPHERIC SCIENCES, 29, 54-62.  doi: 10.1007/s00376-011-0068-x
    [3] LIU Qinyu, WEN Na, YU Yongqiang, 2006: The Role of the Kuroshio in the Winter North Pacific Ocean-Atmosphere Interaction: Comparison of a Coupled Model and Observations, ADVANCES IN ATMOSPHERIC SCIENCES, 23, 181-189.  doi: 10.1007/s00376-006-0181-4
    [4] Masafumi Kamachi, Tsurane Kuragano, Noriya Yoshioka, Jiang Zhu, Francesco Uboldi, 2001: Assimilation of Satellite Altimetry into a Western North Pacific Operational Model, ADVANCES IN ATMOSPHERIC SCIENCES, 18, 767-786.
    [5] Xu Yinlong, Zhou Mingyu, 1999: Numerical Simulations on the Explosive Cyclogenesis over the Kuroshio Current, ADVANCES IN ATMOSPHERIC SCIENCES, 16, 64-76.  doi: 10.1007/s00376-999-0004-5
    [6] LIU Qinyan, WANG Dongxiao, ZHOU Wen, XIE Qiang, ZHANG Yan, 2010: Covariation of the Indonesian Throughflow and South China Sea Throughflow Associated with the 1976/77 Regime Shift, ADVANCES IN ATMOSPHERIC SCIENCES, 27, 87-94.  doi: 10.1007/s00376-009-8061-3
    [7] LI Rui, ZHANG Zuowei, WU Lixin, 2014: High-Resolution Modeling Study of the Kuroshio Path Variations South of Japan, ADVANCES IN ATMOSPHERIC SCIENCES, 31, 1233-1244.  doi: 10.1007/s00376-014-3230-4
    [8] ZHAI Fangguo, WANG Qingye, WANG Fujun, Hu Dunxin, 2014: Variation of the North Equatorial Current, Mindanao Current, and Kuroshio Current in a High-Resolution Data Assimilation during 20082012, ADVANCES IN ATMOSPHERIC SCIENCES, 31, 1445-1459.  doi: 10.1007/s00376-014-3241-1
    [9] Lu Riyu, Chan-Su Ryu, Buwen Dong, 2002: Associations between the Western North Pacific Monsoon and the South China Sea Monsoon, ADVANCES IN ATMOSPHERIC SCIENCES, 19, 12-24.  doi: 10.1007/s00376-002-0030-z
    [10] Jingrui YAN, Wenjun ZHANG, Suqiong HU, Feng JIANG, 2024: Different ENSO Impacts on Eastern China Precipitation Patterns in Early and Late Winter Associated with Seasonally-Varying Kuroshio Anticyclonic Anomalies, ADVANCES IN ATMOSPHERIC SCIENCES.  doi: 10.1007/s00376-023-3196-1
    [11] Li Chongyin, Li Guilong, 1997: Evolution of Intraseasonal Oscillation over the Tropical Western Pacific / South China Sea and Its Effect to the Summer Precipitation in Southern China, ADVANCES IN ATMOSPHERIC SCIENCES, 14, 246-254.  doi: 10.1007/s00376-997-0023-z
    [12] CHENG Xue-Ling, HUANG Jian, WU Lin, ZENG Qing-Cun, 2015: Structures and Characteristics of the Windy Atmospheric Boundary Layer in the South China Sea Region during Cold Surges, ADVANCES IN ATMOSPHERIC SCIENCES, 32, 772-782.  doi: 10.1007/s00376-014-4228-7
    [13] HUANG Ronghui, GU Lei, ZHOU Liantong, WU Shangsen, 2006: Impact of the Thermal State of the Tropical Western Pacific on Onset Date and Process of the South China Sea Summer Monsoon, ADVANCES IN ATMOSPHERIC SCIENCES, 23, 909-924.  doi: 10.1007/s00376-007-0100-3
    [14] Li Chongyin, 1988: ACTIONS OF TYPHOONS OVER THE WESTERN PACIFIC (INCLUDING THE SOUTH CHINA SEA) AND EL NINO, ADVANCES IN ATMOSPHERIC SCIENCES, 5, 107-116.  doi: 10.1007/BF02657352
    [15] Dayong WEN, Jie CAO, 2023: Interdecadal Variations of the March Atmospheric Heat Source over the Southeast Asian Low-Latitude Highlands, ADVANCES IN ATMOSPHERIC SCIENCES, 40, 1584-1596.  doi: 10.1007/s00376-023-2146-2
    [16] LI Wei-Wei, WANG Chunzai, WANG Dongxiao, YANG Lei, DENG Yi, 2012: Modulation of Low-Latitude West Wind on Abnormal Track and Intensity of Tropical Cyclone Nargis (2008) in the Bay of Bengal, ADVANCES IN ATMOSPHERIC SCIENCES, 29, 407-421.  doi: 10.1007/s00376-011-0229-y
    [17] Zhida HUANG, Hailong LIU, Pengfei LIN, Jianyu HU, 2017: Influence of Island Chains on the Kuroshio Intrusion in the Luzon Strait, ADVANCES IN ATMOSPHERIC SCIENCES, 34, 397-410.  doi: 10.1007/s00376-016-6159-y
    [18] LIU Shikuo, LIU Shida, FU Zuntao, XIN Guojun, LIANG Fuming, 2004: The Structure and Bifurcation of Atmospheric Motions, ADVANCES IN ATMOSPHERIC SCIENCES, 21, 557-561.  doi: 10.1007/BF02915723
    [19] DONG Danpeng, ZHOU Weidong, YANG Yang, DU Yan, 2010: On Outflow Passages in the South China Sea, ADVANCES IN ATMOSPHERIC SCIENCES, 27, 60-68.  doi: 10.1007/s00376-009-8050-6
    [20] Jianqi ZHANG, Chongyin LI, Xin LI, Chao ZHANG, Jingjing CHEN, 2021: The Asymmetric Atmospheric Response to the Decadal Variability of Kuroshio Extension during Winter, ADVANCES IN ATMOSPHERIC SCIENCES, 38, 785-799.  doi: 10.1007/s00376-020-0264-7
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    • Manuscript History

    Manuscript received: 10 November 2011
    Manuscript revised: 10 November 2011
    通讯作者: 陈斌, bchen63@163.com
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      沈阳化工大学材料科学与工程学院 沈阳 110142

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    Impact of the South China Sea Throughflow on the Pacific Low-Latitude Western Boundary Current: A Numerical Study for Seasonal and Interannual Time Scales

    • 1. State Key Laboratory of Tropical Oceanography, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, Guy Carpenter Asia-Pacific Climate Impact Centre, School of Energy and Environment, City University of Hong Kong, Hong Kong,State Key Laboratory of Tropical Oceanography, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301,Guy Carpenter Asia-Pacific Climate Impact Centre, School of Energy and Environment, City University of Hong Kong, Hong Kong,State Key Laboratory of Tropical Oceanography, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301,State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029,State Key Laboratory of Tropical Oceanography, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301,State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029
    • Manuscript received: 2011-11-10
    • Manuscript revised: 2011-11-10

    Abstract: Prior studies have revealed that, as a part of the Pacific tropical gyre, the South China Sea throughflow (SCSTF) is strongly influenced by the Pacific low-latitude western boundary current (LLWBC). In this study, ocean general circulation model (OGCM) experiments with and without connection to the South China Sea (SCS) were performed to investigate the impact of the SCSTF on the Pacific LLWBC. These model experiments show that if the SCS is blocked, seasonal variability of the Kuroshio and Mindanao Current becomes stronger, and the meridional migration of the North Equatorial Current (NEC) bifurcation latitude is enhanced. Both in seasonal and interannual time scales, stronger Luzon Strait transport (LST) induces a stronger Kuroshio transport combined with a southward shift of the NEC bifurcation, which is unfavorable for a further increase of the LST; a weaker LST induces a weaker Kuroshio transport and a northward shifting NEC bifurcation, which is also unfavorable for the continuous decrease of the LST.

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