Observations on the field-aligned irregularities using Sanya VHF radar: 1. Ionospheric E-region continuous echoes
文献类型：期刊论文
| 作者 | Ning Bai-Qi1; Li Guo-Zhu1; Hu Lian-Huan1,2; Li Ming1,2 |
| 刊名 | CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION
 |
| 出版日期 | 2013-03-01 |
| 卷号 | 56期号:3页码:719-730 |
| 关键词 | Low-latitude ionospheric E region Field-aligned irregularity Continuous radar echoes VHF coherent radar |
| ISSN号 | 0001-5733 |
| DOI | 10.6038/cjg20130301 |
| 文献子类 | Article |
| 英文摘要 | The occurrence characteristics of continuous radar echoes from low-latitude ionospheric E-region field-aligned irregularities are investigated, using the data from Sanya (109. 6 degrees E, 18. 4 degrees N) VHF coherent radar. The observational results show that the Doppler velocity and spectral width of daytime continuous echoes range from -50 to 25 m/s, and from 20 to 70 m/s, respectively. The echoes descend slowly with a descent rate of 1 km/h, and are highly correlated with the descending of the bottom height of Es trace (h(b)Es). This probably indicates that the background electric field provides a favorable condition for the gradient-drift instability below the density layer producing the continuous echoes. While at nighttime, the Doppler velocity and spectral width of continuous echoes range from -50 to 50 m/s, and from 20 to 110 m/s, respectively. The E-region multiple echo layers, echo layer disruption and upper E-region echo layer generation are often observed during the post-sunset hours, which could be associated with the tidal ion layers, and with the mapping of polarization electric fields generated within the equatorial plasma bubbles, respectively. Additionally, the meridional winds derived from continuous echoes (coherent radar) were generally consistent with those estimated from specular meteor trails (all-sky meteor radar) below 100 km. |
| WOS关键词 | SPORADIC-E ; STATISTICAL CHARACTERISTICS ; EQUATORIAL ELECTROJET ; CHUNG-LI ; LAYER ; ENHANCEMENT |
| WOS研究方向 | Geochemistry & Geophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000317169200001 |
| 出版者 | SCIENCE PRESS |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/87872]  |
| 专题 | 中国科学院地质与地球物理研究所 |
| 通讯作者 | Ning Bai-Qi |
| 作者单位 | 1.Chinese Acad Sci, Inst Geol & Geophys, Beijing Natl Observ Space Environm, Beijing 100029, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Ning Bai-Qi,Li Guo-Zhu,Hu Lian-Huan,et al. Observations on the field-aligned irregularities using Sanya VHF radar: 1. Ionospheric E-region continuous echoes[J]. CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,2013,56(3):719-730. |
| APA | Ning Bai-Qi,Li Guo-Zhu,Hu Lian-Huan,&Li Ming.(2013).Observations on the field-aligned irregularities using Sanya VHF radar: 1. Ionospheric E-region continuous echoes.CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,56(3),719-730. |
| MLA | Ning Bai-Qi,et al."Observations on the field-aligned irregularities using Sanya VHF radar: 1. Ionospheric E-region continuous echoes".CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION 56.3(2013):719-730. |
入库方式： OAI收割
来源：地质与地球物理研究所
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