浅海内波环境下声场时间相关特性*

浅海内波是导致声场时间相关半径减小的一个重要原因，利用2015年南海声传播起伏实验，对比分析了线性内波以及孤立子内波环境下声场时间相关半径的统计特性。实验数据表明大振幅孤立子内波的存在极大的降低了声场的时间相关半径，声场时间相关半径从线性内波环境下的1小时-3小时，降低为孤立子内波环境下的小于20分钟。利用RAM程序仿真模拟了内波环境下的声场时间相关半径，理论预报结果与实验结果相符。

Effects of the internal waves on the temporal correlation of the acoustic field in shallow water

The activity of internal waves in shallow water is an important reason for the decrease of temporal correlation length. Using the data of experiment conducted in 2015 in the northern of South Chinese Sea experiment, the statistical characteristics of the temporal correlation of the acoustic field under the conditions of linear internal waves and soliton internal waves are compared and analyzed. Experimental data shows that nonlinear internal waves greatly reduce the temporal correlation of the acoustic field. The temporal correlation length can decrease from 1-3 hours in the linear internal wave environment to less than 20 minutes in the internal soliton wave environment. In this paper, simulations based on RAM, a popular PE program, is used to interpret the above phenomenon well.