台风激发水下噪声场的建模及其在台风风速反演中的应用  

A numerical model of underwater ambient noise generated by typhoons and application in estimation of typhoon wind speed

作　　者：李风华[1] 刘姗琪 王璟琰 

机构地区：[1]中国科学院声学研究所声场声信息国家重点实验室,北京100190 [2]中国科学院大学,北京100190

出　　处：《声学学报》2016年第5期750-757,共8页Acta Acustica

基　　金：国家自然科学基金项目(11125420)资助

摘　　要：基于简正波理论,结合风成海面噪声传播模型和风成噪声源级模型,推导出台风激发水下噪声场强度的计算公式,建立水下噪声强度与海表面风速的函数关系,并给出模型中相关参数的求解方法。应用这一关系,由台风经过时的水下噪声实测数据,反演得到对应时刻的海表面风速值,并将反演结果与气象台给出的台风风速预报值进行对比。Based on the normal mode theory, we establish an underwater noise intensity formula to solve the problem of inhomogeneous distributed surface noise sources, in which the surface-generated ambient noise model and source intensity model of wind-generated noise are applied. The formula characterizes the relationship between the noise intensity and the surface wind speed, and solution of the key parameters in the formula is provided. By analyzing the experimental data of underwater ambient noise intensity with the proposed formula, we inverse the surface wind speed in the corresponding time period. The inversion result is reasonably consistent with the typhoon forecast issued by typhoon centers, which confirms our model.

关 键 词：水下噪声 风速值 台风 反演 应用 激发 噪声场 声传播模型 

分 类 号：P714.2[天文地球—海洋科学] P733.2