A comparative study of magnetic storm effects on the ionosphere in the polar cap and auroal oval - F-region negative storm
文献类型：期刊论文
| 作者 | Ma, SY; Liu, HX; Schlegel, K |
| 刊名 | CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION
 |
| 出版日期 | 2002-03-01 |
| 卷号 | 45期号:2页码:160-169 |
| 关键词 | geomagnetic storm polar ionosphere convection electric field field-aligned ion upflow |
| 英文摘要 | With coordinated EISCAT and ESR radar data, ionospheric storm in both the dayside polar cap and the auroral oval during the major magnetic storm of May 15, 1997 is studied, focusing on the F-region negative storm. It is found that in both the polar cap and the auroral zone a F1-like peak of ionization appeared at 190km height during the main and recovery phases of the storm; while the normal F2 peak disappeared and great depletions of electron density occurred. In contrast, variations of ion temperature are very different in the two regions, with little change in polar cap while strong enhancement in auroral oval, implying a difference in key mechanisms for the negative storms in the two regions. The increase of O+ ion loss rate through chemical reaction due to Joule heating and enhancement of ion temperature resulted from strong electric field played a crucial role in the auroral zone. The plasma transport process, however, especially the long-lasting large ion upflow, is of great importance-in the polar cap. In addition, large F-region electron density depletion associated with null Joule heating and ion temperature enhancement is observed by EISCAT radar in the transient region of the two cells of plasma convection, which is caused by strong field-aligned O+ ion outflow when the radar passing through probably under the polar cleft ion fountain region. |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 类目[WOS] | Geochemistry & Geophysics |
| 研究领域[WOS] | Geochemistry & Geophysics |
| 关键词[WOS] | EISCAT |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000181887100002 |
| 公开日期 | 2015-12-08 |
| 源URL | [http://ir.wipm.ac.cn/handle/112942/8673]  |
| 专题 | 武汉物理与数学研究所_2011年以前论文发表（包括2011年） |
| 作者单位 | 1.Wuhan Univ, Ctr Elect Informat, Wuhan 430072, Peoples R China 2.Chinese Acad Sci, Wuhan Inst Phys & Math, Wuhan Ionospher Observ, Wuhan 430071, Peoples R China 3.Max Planck Inst Aeron, D-37191 Katlenburg Lindau, Germany |
| 推荐引用方式 GB/T 7714 | Ma, SY,Liu, HX,Schlegel, K. A comparative study of magnetic storm effects on the ionosphere in the polar cap and auroal oval - F-region negative storm[J]. CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,2002,45(2):160-169. |
| APA | Ma, SY,Liu, HX,&Schlegel, K.(2002).A comparative study of magnetic storm effects on the ionosphere in the polar cap and auroal oval - F-region negative storm.CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,45(2),160-169. |
| MLA | Ma, SY,et al."A comparative study of magnetic storm effects on the ionosphere in the polar cap and auroal oval - F-region negative storm".CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION 45.2(2002):160-169. |
入库方式： OAI收割
来源：武汉物理与数学研究所
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