ADCP观测得到的2008年4月吕宋海峡流速剖面结构  

Structures of velocity profile in the Luzon Strait measured by LADCP in April 2008

作　　者：杨成浩[1] 廖光洪[1] 袁耀初[1] 陈洪[1] 金子新[2] 江田憲章[2] 谷口直和[2] 南馆正憲[2] 

机构地区：[1]国家海洋局第二海洋研究所卫星海洋环境动力学国家重点实验室,浙江杭州310012 [2]广岛大学工学部环境科学系

出　　处：《海洋学报》2013年第3期1-10,共10页

基　　金：国家重点基础研究发展计划(2007CB816003;2011CB403503);科技部国际合作项目(2006DFB21630);国家自然科学基金(41176020;40520140073);国家海洋局第二海洋所基本科研业务费专项资助(JT1006)

摘　　要：基于2008年4月22—26日吕宋海峡调查航次的下放式声学多普勒流速剖面仪(LADCP)和船载ADCP(SADCP)等观测资料,并采用潮波模式模拟结果去除潮流对观测资料的影响,观测结果表明:调查期间黑潮入侵南海的位置与1992年春季比较接近,其分支位于调查海区中部C2、C7、C8和C9站,表层黑潮在C8站分离为两支,分别流向C9和C2站,C9站北向流明显比C8站减弱。在C2站,黑潮分支位于400m层以浅,其最大西向流速为77cm/s,而在C7、C8和C9站黑潮分支位于500m层以浅,黑潮在入侵南海的过程中其核心深度逐渐变浅。上层黑潮明显作反气旋弯曲。本调查航次的观测结果在定性上支持吕宋海峡水交换有"三明治"垂直结构的特性。On the basis of the cruising data of Lowered Acoustic Doppler Current Profilers（LADCP）and shipmounted ADCP（SADCP）and so forth,during the cruise of Luzon Strait in April 2008,velocity profile is figured out using the LDEO LADCP processing software.We take use of the simulating results of TPXO7.2（a TOPEX/ POSEIDON global tidal model）to remove the tidal current speed from the measured value.The following main results have been obtained：the core of intruding Kuroshio flows through station C2,C7,C8and C9,respectively,and the positions of core agree basically with those in spring 1992.At station C2the Kuroshio is located in the upper layer from sea surface to 400mwith the maximum westward speed 77cm/s,and its speed decreases with the increase of water depths.At station C7,C8,C9,the Kuroshio is located in the layer from surface to 500m,depth of the Kuroshio becomes shallow gradually when it intrudes into the South China Sea.The observation results may be a support to the sandwiched vertical structure of Luzon Strait transport.

关 键 词：吕宋海峡 流速剖面结构 2008年4月航次 LADCP 

分 类 号：P722.7[天文地球—海洋科学] P731.21