| A review on the South China Sea western boundary current |
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| 作者姓名： | FANG Guohong WANG Gang FANG Yue FANG Wendong |
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| 作者单位： | Key Laboratory of Marine Science and Numerical Modeling, First Institute of Oceanography, State Oceanic Administration, Qingdao 266061, China;;Key Laboratory of Marine Science and Numerical Modeling, First Institute of Oceanography, State Oceanic Administration, Qingdao 266061, China;Key Laboratory of Data Analysis and Applications, First Institute of Oceanography, State Oceanic Administration, Qingdao 266061, China;;Center for Ocean and Climate Research, First Institute of Oceanography, State Oceanic Administration, Qingdao 266061, China;;State Key Laboratory of Tropical Oceanography, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China |
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| 基金项目： | The National Basic Research Program (“973” Program) of China under contract Nos 2011CB403500 and 2012CB957803;the National Natural Science Foundation of China under contract Nos 41006018 and 40730842;and the National High Technology Research and Development Program (“863” Program) of China under contract No.2008AA09A402. |
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| 摘 要： | The advances in understanding the South China Sea (SCS) western boundary current (SCSwbc) have been reviewed since the works of Dale (1956) and Wyrtki (1961) in the middle of the 20th century. The features of the pattern of SCSwbc and the oceanic phenomena associated with it are focused on. The current is driven mainly by monsoon over the SCS and partially by winds over the tropical Pacific governed by the island rule. The SCSwbc exhibits strong seasonal variation in its direction and patterns. In winter, the current is strong and flows southwestward along the South China shelf and slope from the east of Dongsha Islands to the northern central Vietnamese coast, then turns to the south along the central and southern Vietnamese coast, and finally partially exits the SCS through the Karimata Strait. In summer and early fall, the SCSwbc can be divided into three segments based on their characteristics. The southern segment is stable, flowing northward from the Karimata Strait up to about 11 N, where it separates from the coast forming an eastward offshore current. The separation of the current from Vietnamese coast induces some striking features, such as upwelling and cold sea-surface temperature. The middle segment off the central Vietnamese coast may have a bimodal behavior: northward coastal current and meandering current in early summer (June-July), and cyclonic gyre in later summer and early fall (August-September). The northern segment is featured by the summer SCS Warm Current on the South China shelf and a southwestward subsurface current along the continental slope.
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| 关 键 词： | 南海西部 中国南海 边界流 越南北部 评论 海水表面温度 中国南方 热带太平洋 |
| 收稿时间： | 2012/3/12 0:00:00 |
| 修稿时间： | 7/3/2012 12:00:00 AM |
A review on the South China Sea western boundary current |
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| FANG Guohong,WANG Gang,FANG Yue,FANG Wendong.A review on the South China Sea western boundary current[J].Acta Oceanologica Sinica,2012,31(5):1-10. |
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| Authors: | FANG Guohong WANG Gang FANG Yue and FANG Wendong |
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| Affiliation: | Key Laboratory of Marine Science and Numerical Modeling, First Institute of Oceanography, State Oceanic Administration, Qingdao 266061, China;;Key Laboratory of Marine Science and Numerical Modeling, First Institute of Oceanography, State Oceanic Administration, Qingdao 266061, China;Key Laboratory of Data Analysis and Applications, First Institute of Oceanography, State Oceanic Administration, Qingdao 266061, China;;Center for Ocean and Climate Research, First Institute of Oceanography, State Oceanic Administration, Qingdao 266061, China;;State Key Laboratory of Tropical Oceanography, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China |
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| Abstract: | The advances in understanding the South China Sea (SCS) western boundary current (SCSwbc) have been reviewed since the works of Dale (1956) and Wyrtki (1961) in the middle of the 20th century.The features of the pattern of SCSwbc and the oceanic phenomena associated with it are focused on.The current is driven mainly by monsoon over the SCS and partially by winds over the tropical Pacific governed by the island rule.The SCSwbc exhibits strong seasonal variation in its direction and patterns.In winter,the current is strong and flows southwestward along the South China shelf and slope from the east of Dongsha Islands to the northern central Vietnamese coast,then turns to the south along the central and southern Vietnamese coast,and finally partially exits the SCS through the Karimata Strait.In summer and early fall,the SCSwbc can be divided into three segments based on their characteristics.The southern segment is stable,flowing northward from the Karimata Strait up to about 11°N,where it separates from the coast forming an east-ward offshore current.The separation of the current from Vietnamese coast induces some striking features,such as upwelling and cold sea-surface temperature.The middle segment off the central Vietnamese coast may have a bimodal behavior:northward coastal current and meandering current in early summer (June-July),and cyclonic gyre in later summer and early fall (August-September).The northern segment is featured by the summer SCS Warm Current on the South China shelf and a southwestward subsurface current along the continental slope. |
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| Keywords: | South China Sea western boundary current Vietnam offshore current upwelling subsurface current |
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