%0 Journal Article
%T A case study on whole response processes of the ionosphere to typhoons<br>电离层对台风响应的全过程的特例研究
%A XIAO Sai-Guan
%A HAO Yong-Qiang
%A ZHANG Dong-He
%A XIAO Zuo
%A <br>肖赛冠
%A 郝永强
%A 张东和
%A 肖佐
%J 地球物理学报
%D 2006
%I 
%X We present a case study to reveal the detailed process of ionospheric responses to strong disturbances in the lower atmosphere when a strong typhoon lands or approaches the mainland.The ionospheric HF Doppler shift data during the periods of two strong typhoons which occurred in 1988 and 1990 respectively are analyzed in detail.The results show that except the appearance of significant wave-like disturbances(in general,medium scale acoustic-gravity waves AGWs) there are some new phenomena worth noticing: the temporal evolution of these waves in the two cases show clearly the change of both wave main frequency and amplitudes,as time elapses the frequency was getting lower and lower and amplitudes enhanced gradually.After sunset,Spread-F phenomena appeared,showing the role of seeding of the AGWs for exciting of ionospheric irregularities.A comparison is made for the above phenomena with the linear theory of TIDs propagation and also with a non-linear numerical simulation of the dynamic features of AGWs propagation in the atmosphere.All these results are in good agreement.
%K Coupling between lower atmosphere and ionosphere
%K Acoustic-gravity wave in the ionosphere
%K Ionospheric disturbance
%K Ionospheric irregularity<br>低层大气-电离层耦合
%K 电离层声重波
%K 电离层扰动
%K 电离层不规则结构
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=E62459D214FD64A3C8082E4ED1ABABED5711027BBBDDD35B&cid=1E44AE713D8A6DE0&jid=14DC41C59CBF6770055A7D610D53AE46&aid=D0C9DD563B71458D&yid=37904DC365DD7266&vid=2A3781E88AB1776F&iid=38B194292C032A66&sid=F8AEC975DBDD7F2F&eid=3EABEBD973E45554&journal_id=0001-5733&journal_name=地球物理学报&referenced_num=5&reference_num=18