摘要
报道了2003年1月至10月期间,由布放于西北太平洋中的Argo剖面浮标捕获的位于棉兰老岛以东海域的反气旋涡。该涡中心位于8.7°N、127.6°E附近,距大陆坡不远,沿等深线走向呈椭圆形分布。其长轴(NW-SE)约200km,短轴(NE-SW)长约120km。Argo浮标的漂移轨迹及其在表层及1 500db层的漂移速度场表明,该反气旋涡位于温跃层以下,中层海洋特征。在1 500db层上,涡的外围平均切向速度为11.9—14.0cm.s-1,旋转周期约为40d。温、盐度断面分布表明,该反气旋涡内的温盐结构非常复杂,可能与源自南、北半球的中层水团在涡旋内交汇并发生变性有关。
An anticyclonic eddy was observed by the Argo profiling float 5900224 which was deployed at 8. 7°N, 129.9°E in January 2003 by the China real-time Data Center. Both the trajectory and the parkingdepth （1 500db） velocity field estimated from the Argo float showed that there was an anticyclonic eddy just east of Mindanao coast. The anticyclonic eddy centered at about 8. 7°N, 127.6°E off the continental slope. The eddy was elliptic along the slope with a diameter scale about 180kin, and it was stronger during April to July and decayed during August to October in 2003. The tangential velocity of the edge at the parking depth was 11.9-14.0cm·s^-1 and the rotation period was about 40 days. The results of the Sim- ple Ocean Data Assimilation Vertion 1.4. 3 （SODA V1.4. 3） well support the observation by the Argo profiling float. The flow pattern derived from float 5900224 and the results of SODA V1.4. 3 indicate that the eddy has an intermediate feature. The water masses inside the eddy are very complicated and variable. The velocity field at the parking depth estimated from float 5900224 bears little resemblance to that at surface.
出处
《热带海洋学报》
CAS
CSCD
北大核心
2006年第6期8-14,共7页
Journal of Tropical Oceanography
基金
国家科技部国际科技合作重点项目(2002CB714001)
国家海洋局海洋动力过程与卫星海洋学重点实验室开放基金项目(2004)
关键词
西北太平洋
棉兰老岛
反气旋涡
中层流
ARGO剖面浮标
Northwest Pacific Ocean
Mindanao Island
anticyclonic eddy
intermediate current
Argoprofiling float
