东海陆架水对黑潮强剪切的动力学响应  

Dynamic Response of Shelf Water in the East China Sea to Strong Shear in Kuroshio

作　　者：曲媛媛[1] 张庆华[1] 马艳 

机构地区：[1]国家海洋局第一海洋研究所 [2]青岛市气象局

出　　处：《海洋科学进展》2010年第3期292-298,共7页Advances in Marine Science

基　　金：国家重点基础研究发展计划项目--北太平洋副热带环流变异及其对我国近海动力环境的影响的(2007CB411800)

摘　　要：黑潮冲击东海陆架的动力学效应可分解为两部分,黑潮直接入侵和黑潮强剪切作用。研究了东海陆架对黑潮强剪切的动力学响应。从均匀海水的位涡度方程出发,考虑水平摩擦、海底摩擦和地形抬升的共同作用,利用Fourier变换求解该方程得到解析解。计算结果表明,剪切作用所诱导的流环和海水涌升只局限在剪切点附近,这与卫星资料所显示的存在于台湾岛东北部海区的冷涡位置是一致的。The dynamic impacts exerted by Kuroshio on the shelf-water in the East China Sea can be classi-fied into two components,i.e.the direct intrusion and the strong shear of Kuroshio.The dynamic response of the East China Sea shelf-water to the strong shear of Kuroshio is studied in this paper.To start with the potential vontex equation for homogeneous sea water,the horizontal friction,the bottom friction,and the topographic uplifting effect are jointly taken into consideration,and Fourier transform is employed to obtain the analytic solution of the equation.It is shown in the calculation results that the current loop induced from the shear and the water upwelling are limited into the sea area closely adjacent to the shear.These re-sults are consistent with the satellite images in which a cold eddy is located in the sea area northeast of Tai-wan.

关 键 词：黑潮强剪切 位涡度方程 流环 海水涌升 

分 类 号：P731.27[天文地球—海洋科学]