The dependence of plasma density in the topside ionosphere on the solar activity level | |
Liu, L.; Wan, W.; Yue, X.; Zhao, B.; Ning, B.; Zhang, M.-L. | |
刊名 | ANNALES GEOPHYSICAE
![]() |
2007 | |
卷号 | 25期号:6页码:1337-1343 |
关键词 | solar physics, astrophysics, and astronomy ultraviolet emissions ionosphere plasma temperature and density solar radiation and cosmic ray effects |
ISSN号 | 0992-7689 |
文献子类 | Article |
英文摘要 | In this paper, the ten-year (1996-2005) total ion density Ni measurements from the Defense Meteorological Satellite Program (DMSP) spacecraft in the morning and evening (09:30 and 21:30 LT) sectors have been analyzed to explore the dependence of plasma densities in the topside ionosphere at middle and low latitudes on the solar activity level. Results indicate that there is a strong solar activity dependence of DMSP Ni at 848 km altitude, which has latitudinal and seasonal features. The plasma density in the topside ionosphere has an approximately linear dependence on daily F107 and a strongly nonlinear dependence on SEM/SOHO EUV, such that the change rate of Ni becomes greater with increasing solar EUV This is quite different from the dependence of Ni near the F-Region peak (NmF(2)), at which the rate of chan-e of NmF(2) decreases with increasing solar EUV. The rate of change of Ni at the DMSP altitude is greatest in the latitude range where Ni is greatest during high solar activity. We suggest that this greater rate of change (or amplification effect) of Ni at the DMSP altitude is mainly a consequence of the solar activity variations of the topside scale height. The changes in the height of the F-Region peak (hmF(2)) and the density NmF(2) play a secondary role. |
WOS关键词 | SCALE HEIGHT ; ELECTRON-DENSITY ; CYCLE VARIATIONS ; IONIZATION ; EUV ; FOF2 |
WOS研究方向 | Astronomy & Astrophysics ; Geology ; Meteorology & Atmospheric Sciences |
语种 | 英语 |
出版者 | EUROPEAN GEOSCIENCES UNION |
WOS记录号 | WOS:000248406700010 |
内容类型 | 期刊论文 |
源URL | [http://ir.iggcas.ac.cn/handle/132A11/67608] ![]() |
专题 | 中国科学院地质与地球物理研究所 |
通讯作者 | Liu, L. |
作者单位 | Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China |
推荐引用方式 GB/T 7714 | Liu, L.,Wan, W.,Yue, X.,et al. The dependence of plasma density in the topside ionosphere on the solar activity level[J]. ANNALES GEOPHYSICAE,2007,25(6):1337-1343. |
APA | Liu, L.,Wan, W.,Yue, X.,Zhao, B.,Ning, B.,&Zhang, M.-L..(2007).The dependence of plasma density in the topside ionosphere on the solar activity level.ANNALES GEOPHYSICAE,25(6),1337-1343. |
MLA | Liu, L.,et al."The dependence of plasma density in the topside ionosphere on the solar activity level".ANNALES GEOPHYSICAE 25.6(2007):1337-1343. |
个性服务 |
查看访问统计 |
相关权益政策 |
暂无数据 |
收藏/分享 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。
修改评论