三维斜压模式对冬季南海环流的数值计算  

Numerical calculation of the wintertime circulation in the South China Sea by using a baroclinic model

作　　者：游小宝[1,2] 李荣凤[1] 张铭[2] 曾庆存[1] 

机构地区：[1]LASG,中国科学院大气物理研究所 [2]解放军理工大学气象学院,江苏南京211101

出　　处：《海洋学报》2001年第6期1-10,共10页

基　　金：国家自然科学基金 ( 4 0 0 760 0 9;4 990 5 0 0 7) ;中国科学院资源环境领域知识创新工程项目 (KZCX2 - 2 0 5 )

摘　　要：用一个三维、自由表面、原始方程模式对南海环流进行了计算 .计算结果表明 :黑潮在巴士海峡以西呈一反气旋弯曲流动路径 ,有一相对高温高盐的水舌从巴士海峡伸入南海 ,表明有部分黑潮水侵入南海 .冬季南海的一些观测事实在模式结果里得到了很好的反映 ,像冬季逆风向东北方向流动的“南海暖流”和一些中尺度涡旋 .同时还分析了巴士海峡沿 1 2 0 75°E断面的流速和盐度的垂直结构 ,并同观测结果进行了比较 .根据模式结果 ,我们还进一步讨论了“南海暖流”的形成和驱动机制 .The wintertime circulation in the South China Sea(SCS) has been simulated by using a three-dimensional,primitive-equation model with a free surface.Computed results show that:a real anticyclonic meandering path of the Kuroshio appears west of the Bashi Channel(BC),and a tongue with relatively high temperature and salinity spreads into SCS from BC which represents a intrusion of the Kuroshio. Some observed discoveries in SCS in winter such as the South China Sea Warm Current (SCSWC)which is against wind flowing northeastward (NE-ward),and some mesoscale eddies are all revealed by the model. The vertical structure of velocity and salinity along 120.75°E Section in BC reproduced by the model compare well with observations.Based on the model results we also discuss further the formation and driving mechanism of SCSWC.

关 键 词：三维斜压模式 涡旋 南海 暖流 环流 形成机制 驱动机制 盐度 流速 

分 类 号：P732[天文地球—海洋科学]