Model results for the ionospheric lower transition height over mid-latitude
文献类型：期刊论文
| 作者 | Lei, J; Liu, L; Wan, W; Zhang, SR |
| 刊名 | ANNALES GEOPHYSICAE
 |
| 出版日期 | 2004 |
| 卷号 | 22期号:6页码:2037-2045 |
| 关键词 | ionosphere ion chemistry and composition modeling and forecasting middle-latitude ionosphere |
| ISSN号 | 0992-7689 |
| 文献子类 | Article |
| 英文摘要 | Theoretical calculations of the ionospheric lower transition height (LTH), a level of equal O+ and molecular ion densities, were performed and compared with empirical models by Zhang et al. (1996). This paper represents a substantial extension of the prior work by including the AE-C data of ion composition analysis and by detailed quantitative studies of the LTH simulation, and by creating a new LTH empirical model based on our simulations. Results show that: (1) the calculated LTH, in general, is lowest near 11-13 LT and reaches the diurnal maximum after midnight (about 01similar to02 LT). The local time asymmetry becomes more evident in summer, when the time of minimum shifts to 16 LT. (2) The simulated LTH presents a dominant, semiannual variation during nighttime, and a pronounced annual variation during daytime. (3) The simulated LTH increases with solar activity at night and decreases by day, while the standard IRI option has an opposite tendency at night in summer and equinox. Therefore, the day-night difference of simulated LTH significantly increases with solar activity. (4) Both daytime and nighttime LTHs, tend to increase with the increasing geomagnetic activity A(p) index, with a mean slope about 0.1455 km per A(p) unit. (5) The diurnal variation of LTH is found to be more than 20 km, which is much larger than the seasonal variation under F107 = 100 and A(p) = 10. Thus, the diurnal and solar activity variations of LTH are more pronounced than its seasonal and magnetic activity variations. |
| WOS关键词 | LOW-LATITUDE IONOSPHERE ; MILLSTONE HILL ; ATMOSPHERE EXPLORER ; RATE COEFFICIENTS ; CROSS-SECTIONS ; ATOMIC OXYGEN ; F-REGION ; ELECTRON ; N2 ; O2 |
| WOS研究方向 | Astronomy & Astrophysics ; Geology ; Meteorology & Atmospheric Sciences |
| 语种 | 英语 |
| WOS记录号 | WOS:000222836700016 |
| 出版者 | EUROPEAN GEOSCIENCES UNION |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/79651]  |
| 专题 | 中国科学院地质与地球物理研究所 |
| 通讯作者 | Lei, J |
| 作者单位 | 1.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China 2.Chinese Acad Sci, Wuhan Inst Phys & Math, Wuhan Ionospher Observ, Wuhan 430071, Peoples R China 3.MIT, Haystack Observ, Westford, MA 01886 USA |
| 推荐引用方式 GB/T 7714 | Lei, J,Liu, L,Wan, W,et al. Model results for the ionospheric lower transition height over mid-latitude[J]. ANNALES GEOPHYSICAE,2004,22(6):2037-2045. |
| APA | Lei, J,Liu, L,Wan, W,&Zhang, SR.(2004).Model results for the ionospheric lower transition height over mid-latitude.ANNALES GEOPHYSICAE,22(6),2037-2045. |
| MLA | Lei, J,et al."Model results for the ionospheric lower transition height over mid-latitude".ANNALES GEOPHYSICAE 22.6(2004):2037-2045. |
入库方式： OAI收割
来源：地质与地球物理研究所
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