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DOI | 10.1029/2018GL079232 |
Magnetosonic Harmonic Falling and Rising Frequency Emissions Potentially Generated by Nonlinear Wave-Wave Interactions in the Van Allen Radiation Belts | |
Liu, Nigang1,2,3; Su, Zhenpeng1,2; Zheng, Huinan1,2; Wang, Yuming1; Wang, Shui1 | |
2018-08-28 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS
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ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2018 |
卷号 | 45期号:16页码:7985-7995 |
文章类型 | Article |
语种 | 英语 |
国家 | Peoples R China |
英文摘要 | Magnetosonic waves play a potentially important role in the complex evolution of the radiation belt electrons. These waves typically appear as discrete emission lines along the proton gyrofrequency harmonics, consistent with the prediction of the local Bernstein mode instability of hot proton ring distributions. Magnetosonic waves are nearly dispersionless particularly at low harmonics and therefore have the roughly unchanged frequency time structures during the propagation. On the basis of Van Allen Probes observations, we here present the first report of magnetosonic harmonic falling and rising frequency emissions. They lasted for up to 2hr and occurred primarily in the dayside plasmatrough following intense substorms. These harmonic emission lines were well spaced by the proton gyrofrequency but exhibited a clear falling (rising) frequency characteristic in a regime with the temporal increase (decrease) of the proton gyrofrequency harmonics. Such unexpected structures might be produced by the nonlinear interactions between the locally generated magnetosonic waves at the proton gyrofrequency harmonics and a constant frequency magnetosonic wave propagating away from the Earth. |
英文关键词 | magnetosonic wave rising falling frequency Bernstein mode instability wave propagation radiation belt ring current |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000445612500012 |
WOS关键词 | ELECTRON BUTTERFLY DISTRIBUTIONS ; EQUATORIAL NOISE ; RESONANT SCATTERING ; MAGNETIC-FIELD ; ENERGETIC IONS ; SLOT REGION ; PROPAGATION ; PLASMASPHERE ; MODE ; HISS |
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/28158 |
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.Univ Sci & Technol China, Collaborat Innovat Ctr Astronaut Sci & Technol, Hefei, Anhui, Peoples R China; 3.Univ Sci & Technol China, Sch Earth & Space Sci, Menycheng Natl Geophys Observ, Hefei, Anhui, Peoples R China |
推荐引用方式 GB/T 7714 | Liu, Nigang,Su, Zhenpeng,Zheng, Huinan,et al. Magnetosonic Harmonic Falling and Rising Frequency Emissions Potentially Generated by Nonlinear Wave-Wave Interactions in the Van Allen Radiation Belts[J]. GEOPHYSICAL RESEARCH LETTERS,2018,45(16):7985-7995. |
APA | Liu, Nigang,Su, Zhenpeng,Zheng, Huinan,Wang, Yuming,&Wang, Shui.(2018).Magnetosonic Harmonic Falling and Rising Frequency Emissions Potentially Generated by Nonlinear Wave-Wave Interactions in the Van Allen Radiation Belts.GEOPHYSICAL RESEARCH LETTERS,45(16),7985-7995. |
MLA | Liu, Nigang,et al."Magnetosonic Harmonic Falling and Rising Frequency Emissions Potentially Generated by Nonlinear Wave-Wave Interactions in the Van Allen Radiation Belts".GEOPHYSICAL RESEARCH LETTERS 45.16(2018):7985-7995. |
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