Case study on total electron content enhancements at low latitudes during low geomagnetic activities before the storms
文献类型：期刊论文
| 作者 | Liu, Libo; Wan, Weixing; Zhang, Man-Lian; Zhao, Biqiang |
| 刊名 | ANNALES GEOPHYSICAE
 |
| 出版日期 | 2008 |
| 卷号 | 26期号:4页码:893-903 |
| 关键词 | ionosphere equatorial ionosphere ionosphere-atmosphere interactions ionospheric disturbances |
| ISSN号 | 0992-7689 |
| 文献子类 | Article |
| 英文摘要 | Sometimes the ionospheric total electron content (TEC) is significantly enhanced during low geomagnetic activities before storms. In this article, we investigate the characteristics of those interesting TEC enhancements using regional and global TEC data. We analyzed the low-latitude TEC enhancement events that occurred around longitude 120 degrees E on 10 February 2004, 21 January 2004, and 4 March 2001, respectively. The TEC data are derived from regional Global Positioning System (GPS) observations in the Asia/Australia sector as well as global ionospheric maps (GIMs) produced by Jet Propulsion Laboratory (JPL). Strong enhancements under low geomagnetic activity before the storms are simultaneously presented at low latitudes in the Asia/Australia sector in regional TEC and JPL GIMs. These TEC enhancements are shown to be regional events with longitudinal and latitudinal extent. The regions of TEC enhancements during these events are confined at narrow longitude ranges around longitude 120 degrees E. The latitudinal belts of maxima of enhancements locate around the northern and southern equatorial ionization anomaly (EIA) crests, which are consistent with those low-latitude events presented by Liu et al. (2008). During the 4 March 2001 event, the total plasma density N-i observed by the Defense Meteorological Satellite Program (DMSP) spacecraft F13 at 840 km altitude are of considerably higher values on 4 March than on the previous day in the TEC enhanced regions. Some TEC enhancement events are possibly due to contributions from auroral/magnetospheric origins; while there are also quasi-periodic enhancement events not related to geomagnetic activity and associated probably with planetary wave type oscillations (e.g. the 6 January 1998 event). Further investigation is warrented to identify/separate contributions from possible sources. |
| WOS关键词 | WAVE-TYPE OSCILLATIONS ; F-REGION ; IONOSPHERE ; TIME ; DISTURBANCE ; SYSTEM ; FIELDS ; ELECTRODYNAMICS |
| WOS研究方向 | Astronomy & Astrophysics ; Geology ; Meteorology & Atmospheric Sciences |
| 语种 | 英语 |
| WOS记录号 | WOS:000256849800013 |
| 出版者 | COPERNICUS PUBLICATIONS |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/69732]  |
| 专题 | 中国科学院地质与地球物理研究所 |
| 通讯作者 | Liu, Libo |
| 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, Libo,Wan, Weixing,Zhang, Man-Lian,et al. Case study on total electron content enhancements at low latitudes during low geomagnetic activities before the storms[J]. ANNALES GEOPHYSICAE,2008,26(4):893-903. |
| APA | Liu, Libo,Wan, Weixing,Zhang, Man-Lian,&Zhao, Biqiang.(2008).Case study on total electron content enhancements at low latitudes during low geomagnetic activities before the storms.ANNALES GEOPHYSICAE,26(4),893-903. |
| MLA | Liu, Libo,et al."Case study on total electron content enhancements at low latitudes during low geomagnetic activities before the storms".ANNALES GEOPHYSICAE 26.4(2008):893-903. |
入库方式： OAI收割
来源：地质与地球物理研究所
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