摘要
综述东海和琉球群岛以东海域若干气旋型和反气旋型涡旋的研究．对东海陆架、200m以浅海域，主要讨论了东海西南部反气旋涡、济州岛西南气旋式涡和长江口东北气旋式冷涡．东海两侧和陆坡附近出现了各种不同尺度的涡旋，其动力原因之一是与东海黑潮弯曲现象有很大关系，其次也与地形、琉球群岛存在等有关．东海黑潮有两种类型弯曲：黑潮锋弯曲和黑潮路径弯曲．黑潮第一种弯曲出现了锋面涡旋，评述了锋面涡旋的存在时间尺度与空间尺度和结构等；也指出了黑潮第二种弯曲，即路径弯曲时在其两侧出现了中尺度气旋式和反气旋涡，讨论了它们的变化的特性．特别讨论了冲绳北段黑潮弯曲路径和中尺度涡的相互作用，着重指出，当气旋式涡在冲绳海槽北段成长，并充分地发展，其周期约在1～3个月时，它的空间尺度成长到约为200km（此尺度相当于冲绳海槽的纬向尺度）时，黑潮路径从北段转移到南段．也分析了东海黑潮流量和其附近中尺度涡的相互作用．最后指出在琉球群岛以东、以南海域，经常出现各种不同的中尺度反气旋式和气旋式涡，讨论了它们在时间与空间尺度上变化的特征．
Overview of studies on some cyclonic and anti-cyclonic eddies is made in the East China Sea and the region east of the Ryukyu Islands. In the continental shelf above 200 m level in the East China Sea （ECS）, we discuss mainly an anti-cyclonic eddy in southwestern part of the ECS, a cyclonic mesoscale eddy southwest of Cheju Island and a cyclonic eddy northeast of Changjiang. In the region near continental slope and both sides of the Kuroshio in the ECS, there are some mesoscale eddies with the different scales, and one of their dynamical causes may be due to the Kuroshio meander in the ECS. The second dynamical causes are related to the topographic relief and existence of Ryukyu Islands. There are two types of the meanders of the Kuroshio in the ECS： the Kuroshio front meander and the Kuroshio path meander. For the Kuroshio front meander, their time and space scales and the structure of the Kuroshio frontal eddy are reviewed. For the Kuroshio path meander, we discuss the mesoscale cyclonic and anti-cyclonic eddies on both sides of the Kuroshio and the variability of their character. Especially, we discuss with emphasis the interaction between the Kuroshio path meander and the mesoscale eddy, and point out that the following fact. When the growing cyclonic eddy in the northern Okinawa Trough dominates variability at periods of 1-3 months and its scale grows to about 200 km corresponding to the zonal scale grows to about Okinawa Trough, the Kuroshio path translates from the northern path to southern one. We also review the interaction between the volume transport of the Kuroshio in the ECS and the mesoscale eddy. In the regions east and south of the Ryukyu Islands, there are some mesoscale cyclonic and anticyclonic eddies with different scales, and the variability of their character is also reviewed.
出处
《海洋学报》
CAS
CSCD
北大核心
2007年第2期1-17,共17页
基金
国家科技部国际合作项目(2006DFB21630)
国家自然科学基金会项目(4051007340176007)
关键词
东海
琉球群岛以东海域
气旋型和反气旋型涡旋
东海黑潮和中尺度涡相互作用
East China Sea
region east of the Ryukyu Islands
cyclonic and anti-cyclonic eddies
interaction between the Kuroshio and the mesoscale eddy in ECS
