| 2000年夏季南海环流的改进逆方法计算 |
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| 引用本文： | 袁耀初,刘勇刚,楼如云,苏纪兰,王康墡.2000年夏季南海环流的改进逆方法计算[J].海洋学报,2004,26(1):1-13. |
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| 作者姓名： | 袁耀初 刘勇刚 楼如云 苏纪兰 王康墡 |
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| 作者单位： | 1.国家海洋局, 第二海洋研究所, 浙江, 杭州, 310012;国家海洋局, 海洋动力过程和卫星海洋学重点实验室, 浙江, 杭州, 310012 |
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| 基金项目： | 国家基础研究发展规划项目(G1999043805). |
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| 摘 要： | 基于2000年8月航次在南海调查资料,采用改进逆方法,并结合TOPEX/ERS分析的SSH分布,获得以下的主要结果:(1)南海中部和西南部环流系统主要受反气旋环流所支配.主要有越南东南反气旋涡W1,其水平尺度约为300km,垂向深度可达1000m以深,流速很强,其最大流速为79cm/s左右,还有暖涡W2以及吕宋岛西南反气旋涡环流系统W3.其次,在反气旋涡W1与W2之间还存在气旋式涡C1.其水平尺度比暖涡W1小得多,流速也较强.两涡W1与C1之间存在一支南向流,它们组成一个准偶极子.(2)在暖涡W1的西侧存在西边界流,即北向射流,其流速很强,约在12°N流向转向东北.(3)南海北部环流系统主要受气旋环流所支配.在断面N2附近及以北存在一个气旋式环流系统.其次,在海南岛东南存在一个尺度不大的反气旋环流系统.(4)南海东南部环流系统主要受气旋环流所支配.主要有在巴拉望岛以西存在尺度较大的气旋环流系统,以及暖涡W1东南存在一个气旋环流系统.其次,在加里曼丹岛西北还存在范围不大的反气旋环流.(5)比较1998年夏季航次与2000年夏季航次时计算结果,虽然它们在定量上有些变化与差别,但在定性上它们的环流结构有十分相似之处.这表明,南海环流具有明显的季节特性.(6)比较2000年夏季南海水文结构,流函数分布以及TOPEX/ERS的SSH分布,它们在定性上十分吻合.
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| 关 键 词： | 夏季南海环流 南海环流的季节特性 多涡结构 改进逆方法 |
| 文章编号： | 0253-4193(2004)01-0001-13 |
| 收稿时间： | 5/4/2003 12:00:00 AM |
| 修稿时间： | 2003/7/10 0:00:00 |
Calculation of circulation in the South China Sea during the summer of 2000 by the modified inverse method |
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| YUAN Yao-chu,LIU Yong-gang,LOU Ru-yun,SU Ji-lan and WANG Kang-shan.Calculation of circulation in the South China Sea during the summer of 2000 by the modified inverse method[J].Acta Oceanologica Sinica (in Chinese),2004,26(1):1-13. |
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| Authors: | YUAN Yao-chu LIU Yong-gang LOU Ru-yun SU Ji-lan and WANG Kang-shan |
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| Institution: | 1.Second Institute of Oceanography, State Oceanic Administration, Hangzhou 310012, China;Key Laboratory of OceanDynamic Processes and Satellite Oceanography of State Oceaceanic Administration, Hangzhou 310012, China;2.College of Marine Science, University of South Florida, U.S.A. |
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| Abstract: | On the basis of hydrographic data obtained in August 2000 cruise,the circulation in the South China Sea (SCS)is computed by using the modified inverse method in combination with SSH data from TOPEX/ER S-2 Analysis.The following results have been obtained.(1)The central and southw estern SCSs are dominated mainly by anticyclonic circulation systems.They are mainly as follows.1)There is strong anticyclonic eddy southeast of Vietnam(W1).Its horizontal scale is about 300 km,and it extends vertically from the surface to the 1 000 m more than.It is very strong with a Vmax of about 79 cm/s;2)there are a warm eddy W2 and the anticyclonic circulation system W3 west off the Philippines.In the next place,there is a stronger cyclonic eddy C1 between the anticy clonic eddies W1 and W2,and it is also strong.A southward flow exists between the eddies W1 and C1.The eddies W1 and C1 compose a quasi-dipole.(2)A strong coastal jet is present at the western boundary west of an anticy clonic eddy W1,and the jet flows northward and separates from the coast of Vietnam at about 12°N to the northeast. |
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| Keywords: | SCS circulation in summer of 2000 obvious seasonal feature multi-eddies structure modified inverse method |
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