内孤立波绕岛三维演化特性实验研究  

Experiment on three-dimensional characteristics for internal solitary waves past an island

作　　者：张莹[1] 陈旭[1] 贾晓娜[1] 孟静[1] 张善武[1] 

机构地区：[1]中国海洋大学物理海洋教育部重点实验室,青岛266100

出　　处：《水动力学研究与进展（A辑）》2013年第5期511-517,共7页Chinese Journal of Hydrodynamics

基　　金：国家自然科学基金项目(40906001;41276008)~~

摘　　要：南海是内孤立波的多发地带,内孤立波形成后向西传播,绕过东沙岛时,波形、振幅等波参数会发生相应的变化。该文主要运用实验方法来研究内孤立波绕岛后三维特性的演化。实验中内孤立波在两层流体中传播,其中上层为清水,下层为等密度的盐水。实验技术运用荧光方法直接得到内孤立波引起的波形变化与合成孔径雷达(SAR)拍摄到的东沙群岛附近内孤立波作定性的比较,并与染色方法相结合反演出内孤立波绕岛后的各个位置处的振幅变化,体现出内孤立波绕岛后的三维演化特性。染色方法和荧光方法的结合在定性观测基础上得到了进一步的内孤立波的定量分析结果。The South China Sea （SCS） is a region where internal solitary waves （ISWs） are very active. The ISWs will propagate westward after they form in the northern SCS. During the propagation process of the ISWs past the DongSha Island, their shapes and amplitudes will change accordingly. This paper mainly investigates the three-dimensional evolution characteri- stics of the ISWs past an Island by use of the experimental method. In this experiment, an ISW propagates in a two-layer fluid with the pure water in the upper and the salt water of constant density in the lower. The waveform changes of the ISW induced by the Island are observed by the fluorescent method and are qualitatively compared with the surface signature of ISWs captured by Synthetic Aperture Radar （SAR）, as well as the amplitude variations of the ISW in different locations are successfully inversed by using the fluorescent method combined with the dyeing technique after its passes the island. Further experimental results from the combination of the fluorescent and dyeing method suggest that it is possible to obtain the quantitative analysis results combi- ning the fluorescent and dyeing method.

关 键 词：内孤立波 三维演化 绕岛 荧光 反演 

分 类 号：P731.24[天文地球—海洋科学]