Observational study of daytime ionospheric irregularities associated with typhoon
文献类型：期刊论文
| 作者 | Xiao SaiGuan; Shi JianKui; Zhang DongHe; Hao YongQiang; Huang WeiQuan |
| 刊名 | SCIENCE CHINA-TECHNOLOGICAL SCIENCES
 |
| 出版日期 | 2012 |
| 卷号 | 55期号:5页码:1302-1304 |
| 关键词 | ionospheric irregularity spread-F daytime typhoon |
| ISSN号 | 1674-7321 |
| 通讯作者 | Xiao, SG (reprint author), Chinese Acad Sci, Ctr Space Sci & Appl Res, State Key Lab Space Weather, Beijing 100190, Peoples R China. |
| 中文摘要 | 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. |
| 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. |
| 学科主题 | 空间物理 |
| 收录类别 | SCI ; EI |
| 资助信息 | National Natural Science Foundation of China [40974091, 41174135, 40921063]; Specialized Research Fund for State Key Laboratories |
| 语种 | 英语 |
| 公开日期 | 2014-12-15 |
| 源URL | [http://ir.nssc.ac.cn/handle/122/3121]  |
| 专题 | 国家空间科学中心_空间科学部 |
| 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,2012,55(5):1302-1304. |
| 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,55(5),1302-1304. |
| MLA | Xiao SaiGuan,et al."Observational study of daytime ionospheric irregularities associated with typhoon".SCIENCE CHINA-TECHNOLOGICAL SCIENCES 55.5(2012):1302-1304. |
入库方式： OAI收割
来源：国家空间科学中心
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