Observational study of daytime ionospheric irregularities associated   with typhoon

doi:10.1007/s11431-012-4816-7

CORC > 北京大学 > 地球与空间科学学院

	Observational study of daytime ionospheric irregularities associated with typhoon
	Xiao SaiGuan ; Shi JianKui ; Zhang DongHe ; Hao YongQiang ; Huang WeiQuan
刊名	science china technological sciences
	2012
关键词	ionospheric irregularity spread-F daytime typhoon F-LIKE IRREGULARITIES GRAVITY-WAVES SPREAD-F JICAMARCA
DOI	10.1007/s11431-012-4816-7
英文摘要	Spread-F is a manifestation of ionospheric irregularities and generally takes place at nighttime. However, it can also be observed seldom at daytime. It is recognized that acoustic gravity waves (AGWs) play an important role in triggering plasma instability which results in spread-F in the ionosphere. The typhoon is a main source of the AGWs. In this paper, two cases of ionospheric daytime spread-F in the period of typhoon were analyzed. One case was on July 29, 1988 and the other was on August 01, 1989. The results showed the following: I) There were some wave-like disturbances appearing in the HF Doppler records firstly, consequently the Doppler echo traces became scattered, which indicated that the ionospheric spread-F was triggered; 2) the blurred echo traces in the both two cases appeared in the morning (08:30-11:30 Beijing time) and lasted for more than two hours; 3) with the blurred echoes gradually weakening, the traveling ionospheric disturbances (TIDs) still existed and became clearer; 4) the frequency shifts in the two cases were both positive, implying the effective reflecting surface of the radio wave in the ionosphere moved downwards. These results provide good observational evidence for daytime spread-F during the typhoon period in Asian region.; Engineering, Multidisciplinary; Materials Science, Multidisciplinary; SCI(E); EI; 0; ARTICLE; 5; 1302-1304; 55
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/235431]
专题	地球与空间科学学院
推荐引用方式 GB/T 7714	Xiao SaiGuan,Shi JianKui,Zhang DongHe,et al. Observational study of daytime ionospheric irregularities associated with typhoon[J]. science china technological sciences,2012.
APA	Xiao SaiGuan,Shi JianKui,Zhang DongHe,Hao YongQiang,&Huang WeiQuan.(2012).Observational study of daytime ionospheric irregularities associated with typhoon.science china technological sciences.
MLA	Xiao SaiGuan,et al."Observational study of daytime ionospheric irregularities associated with typhoon".science china technological sciences (2012).