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DOI | 10.1002/2017GL075824 |
Analysis of the Duration of Rising Tone Chorus Elements | |
Teng, S.1,2; Tao, X.1,2; Xie, Y.1,2; Zonca, F.3,4,5; Chen, L.4,5,6; Fang, W. B.1,2; Wang, S.1,2 | |
2017-12-28 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS |
ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2017 |
卷号 | 44期号:24 |
文章类型 | Article |
语种 | 英语 |
国家 | Peoples R China; Italy; USA |
英文摘要 | The duration of chorus elements is an important parameter to understand chorus excitation and to quantify the effects of nonlinear wave-particle interactions on energetic electron dynamics. In this work, we analyze the duration of rising tone chorus elements statistically using Van Allen Probes data. We present the distribution of chorus element duration () as a function of magnetic local time (MLT) and the geomagnetic activity level characterized by auroral electrojet (AE) index. We show that the typical value of for nightside and dawnside is about 0.12s, smaller than that for dayside and duskside by about a factor of 2 to 4. Using a previously developed hybrid code, DAWN, we suggest that the background magnetic field inhomogeneity might be an important factor in controlling the chorus element duration. We also report that is larger during quiet times and shorter during moderate and active periods; this result is consistent with the MLT dependence of and the occurrence pattern of chorus waves at different levels of geomagnetic activity. We then investigate the correlation between and the frequency chirping rate (). We show that, from observation, scales with as -1.1, suggesting that statistically the frequency range of chorus elements () should be roughly the same for different elements. These findings should be useful to the further development of a theoretical model of chorus excitation and to the quantification of nonlinear wave-particle interactions on energetic electron dynamics. |
英文关键词 | chorus element duration Van Allen Probes DAWN frequency chirping rate |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000422954700033 |
WOS关键词 | RADIATION-BELT ELECTRONS ; COHERENT VLF WAVES ; MAGNETOSPHERIC CHORUS ; ENERGETIC ELECTRONS ; ACCELERATION ; GENERATION ; SCATTERING ; DIFFUSION ; AMPLITUDE ; ANGLE |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/25498 |
专题 | 气候变化 |
作者单位 | 1.Univ Sci & Technol China, Dept Geophys & Planetary Sci, CAS Key Lab Geospace Environm, Hefei, Anhui, Peoples R China; 2.Collaborat Innovat Ctr Astronaut Sci & Technol, Hefei, Anhui, Peoples R China; 3.ENEA CR Frascati, Frascati, Italy; 4.Zhejiang Univ, Inst Fus Theory & Simulat, Hangzhou, Zhejiang, Peoples R China; 5.Zhejiang Univ, Dept Phys, Hangzhou, Zhejiang, Peoples R China; 6.Univ Calif Irvine, Dept Phys & Astron, Irvine, CA USA |
推荐引用方式 GB/T 7714 | Teng, S.,Tao, X.,Xie, Y.,et al. Analysis of the Duration of Rising Tone Chorus Elements[J]. GEOPHYSICAL RESEARCH LETTERS,2017,44(24). |
APA | Teng, S..,Tao, X..,Xie, Y..,Zonca, F..,Chen, L..,...&Wang, S..(2017).Analysis of the Duration of Rising Tone Chorus Elements.GEOPHYSICAL RESEARCH LETTERS,44(24). |
MLA | Teng, S.,et al."Analysis of the Duration of Rising Tone Chorus Elements".GEOPHYSICAL RESEARCH LETTERS 44.24(2017). |
条目包含的文件 | 条目无相关文件。 |
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