| 夏季南海上层环流动力机制的数值研究 |
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| 引用本文： | 蔡树群,苏纪兰,甘子钧,刘秦玉.夏季南海上层环流动力机制的数值研究[J].海洋学报,2002,24(1):1-7. |
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| 作者姓名： | 蔡树群 苏纪兰 甘子钧 刘秦玉 |
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| 作者单位： | 1.中国科学院南海海洋研究所LED实验室, 广东, 广州, 510301 |
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| 基金项目： | 国家自然科学基金项目 (4 96 36 2 30 )，中国科学院资源环境研究项目 (KZ95 1-B1- 40 8)，国家重点基础研究发
展规划项目 (G19990 4380 6 ) |
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| 摘 要： | 通过利用一个分区性的正压-斜压衔接模式来探讨夏季南海的上层环流特征及其动力机制,结果表明:夏季期间,由于风生环流的不稳定性促使在东沙群岛附近的气旋涡的强度及位置发生变化,并间接导致黑潮侵入南海北部的程度变化以及气旋涡南侧的反气旋式环流、西沙群岛西南侧的气旋涡的强度和范围出现波动现象;在南海南部的北向西边界流由于离岸的西南季风所驱动在中南半岛中部沿岸脱离岸线往东北方向的流动,导致沿岸的水体大量流失而在沿岸形成一支南向补偿流并在西沙群岛西南侧诱生一气旋涡,而上述的离岸西边界流则作顺时针方向流动,从而在南海南部形成反气旋式大环流;在南沙海槽附近出现的局地气旋涡和万安滩附近的气旋涡分别受β效应、底形效应的作用而形成.
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| 关 键 词： | 数值模式 南海 环流 季风 涡旋 波动 |
| 文章编号： | 0253-4193(2002)01-0001-07 |
| 收稿时间： | 6/5/2000 12:00:00 AM |
| 修稿时间： | 2000年6月5日 |
The numerical study of the dynamic mechanism of the South China Sea upper circulation in summer |
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| CAI Shu-qun,SU Ji-lan,GAN Zi-jun and LIU Qin-yu.The numerical study of the dynamic mechanism of the South China Sea upper circulation in summer[J].Acta Oceanologica Sinica (in Chinese),2002,24(1):1-7. |
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| Authors: | CAI Shu-qun SU Ji-lan GAN Zi-jun and LIU Qin-yu |
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| Institution: | 1.LED, South China Sea Institute of Oceanology, Chinese Academy of Science, Guangzhou 510301, China2.Second Institute of Oceanography, State Oceanic Administration, Hangzhou 310012, China3.Qingdao Ocean University, Qingdao 266003, China |
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| Abstract: | An divisional barptropic and baroclinic connection model is employed to study the South China Sea(SCS) upper circulation characteritics and its dynamic mechanism in summer.The results are:during summer,the strength and position of the cyclonic eddy adjacent to Dongsha Islands varies due to the instability of wind-driven current,which indirectly cause the intrusion extent of Kuroshio into the northern SCS,the strength and range of the anticyclonicgyre to the south of the above eddy,the cyclonic eddy to the south west of Xisha Isalnds etc.to fluctuate.The northward western boundary current in the southern SCS flows northeastw ard off the shoreline of middle Indo-China Peninsular due to the driving of southwest monsoon offshore,which brings about loss of lar ge amount water alongshore and the for mation of a southw ard compensating current alongshore,and then a cyclonic eddy to the southwest of Xisha Isalnds is induced.The above offshore western boundary current flows clockwise,thus forms an anticyclonic gyre in the southern SCS.The local cyclonic eddies adjacent to Nansha Trough and Wanan Shoals are formed by the actions of effect and bottom to pographic effect. |
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| Keywords: | numerical model South China Sea circulation monsoon eddy fluctuation |
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