黄海冷水团声层析监测数值模拟

Numerical Simulation of Acoustic Tomography for Monitoring the Yellow Sea Cold Water Mass

海洋冷水团是海洋学家关注多年的问题 ,其监测方法亟待解决。本文将简正波波数层析法用于冷水团监测 ,并对简正波波数层析用于反演黄海冷水团声速剖面进行了数值模拟。数值模拟结果表明 ,简正波波数层析可以用于反演平均声速剖面 ,特别在监测与距离有关海洋环境的声速结构方面大有潜力。

In this paper a new tomography approach, the modal wave-number tomography (MWNT), is proposed for monitoring the cold water mass and a numerical simulation is carried out for the Yellow Sea cold water mass in this paper. A perturbation inversion method is used for inversing the sound speed profile (SSP), with empirical orthonormal functions (EOF) applied to reduce parameter search space. The numerical simulation shows that the modal wave number tomography can be used to invese the average SSP of the cold water mass. Therefore,it shows potential for monitoring ocean internal structure which is range dependent.