分析台风季节所观测到的次声波扰动

Analyzing infrasonic disturbance observed in typhoon season

根据HF Doppler探测系统所连续观测到的次声波扰动事例中采用了其中两个典型的长持续时间、大振幅的次声波扰动事例 ,指出了我国上空电离层中也存在由于恶劣气候而引起的次声波扰动。从它们的频谱图上发现了三个显著的峰。通过与国外同行的工作比较 ,说明次声波扰动具有区域性特点 ,同时给出了造成这一特点的可能原因。

We have been observed infrasonic disturbance by our HF Doppler detector.In this article,using two typical cases we point out that in china there exist F 2 layer infrasonic disturbance which is due to severe weather.Through analyzing their spectrums,we find three remarkable peaks.Comparing with foreign scientists,we indicate that infrasonic disturbances possesses local feature.