台风次声的射线寻迹

本文应用经典的射线理论方法处理了台风所造成的次声波的传播问题。从流体动力学基本方程组出发,在考虑到风和重力的影响下,推导出台风次声所适用的三维射线方程组。
在实际大气的典型情况下对该方程组进行数值积分,得出对应于不同初始出射角的一族声线。将计算结果同1978年6号台风的现场观测结果进行了比较,表明声线到达角与传播距离的对应关系的计算结果与观测结果令人满意地相符。

RAY TRACING FOR INFRASONIC WAVES GENERATED BY TYPHOON

The propagation problem of inf rasonic waves generated from typhoon has been treated by classical ray theory methods. Starting from the fundamental equations of hydrodynamics including the influences due to horizontal winds and gravitational force, the following set of three-dimensional ray equations in rectangular coordinates governing the infrasonic waves, the main frequency of which is 0.2 Hz approximately, is obtained under the assumption of horizontal stratification.