A Three-Dimensional Ray Tracing Study on Whistler-Mode Chorus During Geomagnetic Activities
文献类型：期刊论文
| 作者 | Zhou Qinghua; Shi Jiankui; Xiao Fuliang |
| 刊名 | PLASMA SCIENCE & TECHNOLOGY
 |
| 出版日期 | 2011 |
| 卷号 | 13期号:4页码:440-445 |
| 关键词 | 3-D ray tracing study whistler-mode chorus geomagnetic activities |
| ISSN号 | 1009-0630 |
| 通讯作者 | Xiao, FL (reprint author), Changsha Univ Sci & Technol, Sch Phys & Elect Sci, Changsha 410004, Hunan, Peoples R China. |
| 中文摘要 | A three-dimensional ray tracing study of a whistler-mode chorus is conducted for different geomagnetic activities by using a global core plasma density model. For the upper-band chorus, the initial azimuthal wave angle affects slightly the projection of ray trajectories onto the plane (Z, root(x(2) + y(2))), but controls the longitudinal propagation. The trajectory of the upper-band chorus is strongly associated with the plasmapause and the magnetic local time (MLT) of chorus source region. For the high geomagnetic activity, the chorus trajectory moves inward together with the plasmapause. In the bulge region, the plasmapause extends outward, while the chorus trajectory moves outward together with the plasmapause. For moderately or high geomagnetic activity, the lower-band chorus suffers low hybrid resonance (LHR) reflection before it reaches the plasmapause, leading to a weak correlation with the geomagnetic activity and magnetic local time of the chorus source region. For low geomagnetic activity, the lower-band chorus may be reflected firstly at the plasmapause instead of suffering LHR reflection, exhibiting a propagation characteristic similar to that of the upper-band chorus. The results provide a new insight into the propagation characteristics of the chorus for different geomagnetic activities and contribute to further understanding of the acceleration of energetic electron by a chorus wave. |
| 英文摘要 | A three-dimensional ray tracing study of a whistler-mode chorus is conducted for different geomagnetic activities by using a global core plasma density model. For the upper-band chorus, the initial azimuthal wave angle affects slightly the projection of ray trajectories onto the plane (Z, root(x(2) + y(2))), but controls the longitudinal propagation. The trajectory of the upper-band chorus is strongly associated with the plasmapause and the magnetic local time (MLT) of chorus source region. For the high geomagnetic activity, the chorus trajectory moves inward together with the plasmapause. In the bulge region, the plasmapause extends outward, while the chorus trajectory moves outward together with the plasmapause. For moderately or high geomagnetic activity, the lower-band chorus suffers low hybrid resonance (LHR) reflection before it reaches the plasmapause, leading to a weak correlation with the geomagnetic activity and magnetic local time of the chorus source region. For low geomagnetic activity, the lower-band chorus may be reflected firstly at the plasmapause instead of suffering LHR reflection, exhibiting a propagation characteristic similar to that of the upper-band chorus. The results provide a new insight into the propagation characteristics of the chorus for different geomagnetic activities and contribute to further understanding of the acceleration of energetic electron by a chorus wave. |
| 学科主题 | 空间物理 |
| 收录类别 | SCI ; EI |
| 资助信息 | National Natural Science Foundation of China [40874076, 40925014] |
| 语种 | 英语 |
| 公开日期 | 2014-12-15 |
| 源URL | [http://ir.nssc.ac.cn/handle/122/3080]  |
| 专题 | 国家空间科学中心_空间科学部 |
| 推荐引用方式 GB/T 7714 | Zhou Qinghua,Shi Jiankui,Xiao Fuliang. A Three-Dimensional Ray Tracing Study on Whistler-Mode Chorus During Geomagnetic Activities[J]. PLASMA SCIENCE & TECHNOLOGY,2011,13(4):440-445. |
| APA | Zhou Qinghua,Shi Jiankui,&Xiao Fuliang.(2011).A Three-Dimensional Ray Tracing Study on Whistler-Mode Chorus During Geomagnetic Activities.PLASMA SCIENCE & TECHNOLOGY,13(4),440-445. |
| MLA | Zhou Qinghua,et al."A Three-Dimensional Ray Tracing Study on Whistler-Mode Chorus During Geomagnetic Activities".PLASMA SCIENCE & TECHNOLOGY 13.4(2011):440-445. |
入库方式： OAI收割
来源：国家空间科学中心
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