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DOI | 10.1029/2018GL078765 |
Observation of Oblique Lower Band Chorus Generated by Nonlinear Three-Wave Interaction | |
Teng, S.1,2; Zhao, J.3; Tao, X.1,2; Wang, S.1,2; Reeves, G. D.4,5 | |
2018-07-16 | |
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:13页码:6343-6352 |
文章类型 | Article |
语种 | 英语 |
国家 | Peoples R China; USA |
英文摘要 | Oblique whistler mode waves have been suggested to play an important role in radiation belt electron dynamics. Recently, X. Fu et al. (2017, ) proposed that highly oblique lower band whistler waves could be generated by nonlinear three-wave resonance. Here we present the first observational evidence of such process, using Van Allen Probes data, where an oblique lower band chorus wave is generated by two quasi-parallel waves through nonlinear three-wave interaction. The wave resonance condition is satisfied even in the presence of frequency chirping of one of the pump waves. Different from the simulation results of X. Fu et al. (2017), simultaneous particle data do not show a plateau in the electron distribution, which could be due to the very weak intensity of the generated waves. These results should help to better understand the generation of oblique waves in the inner magnetosphere and their relative roles in energetic electron dynamics. Plain Language Summary Oblique lower band whistler mode waves play an important role in the energetic electron dynamics in the magnetosphere. Recent research has also tried to understand how these highly oblique waves are generated. This paper presents the observations which directly confirm a recently proposed generation mechanism of oblique waves via nonlinear wave-wave interaction. In this theory, an oblique whistler wave, called the daughter wave, can obtain energy from the coupling with two parent whistler waves. Our observation shows that the generated oblique whistler waves also exhibit frequency chirping, caused by the frequency chirping of one of the parent waves. However, the observed waves are too weak to effectively scatter or energize electrons. Our study should be useful to further understand how the oblique waves are excited and their effects on energetic electron dynamics in the inner magnetosphere. |
英文关键词 | oblique lower band chorus wave-wave interaction radiation belt physics wave-particle interaction |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000439784300003 |
WOS关键词 | WHISTLER-MODE WAVES ; OUTER RADIATION BELT ; MAGNETOSPHERIC CHORUS ; PULSATING AURORA ; SCATTERING ; ACCELERATION ; FREQUENCY ; EMISSIONS ; PARTICLE |
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/29096 |
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, Nanjing, Jiangsu, Peoples R China; 3.Chinese Acad Sci, Purple Mt Observ, Nanjing, Jiangsu, Peoples R China; 4.Los Alamos Natl Lab, Space Sci & Applicat Grp, Los Alamos, NM USA; 5.New Mexico Consortium, Space Sci Div, Los Alamos, NM USA |
推荐引用方式 GB/T 7714 | Teng, S.,Zhao, J.,Tao, X.,et al. Observation of Oblique Lower Band Chorus Generated by Nonlinear Three-Wave Interaction[J]. GEOPHYSICAL RESEARCH LETTERS,2018,45(13):6343-6352. |
APA | Teng, S.,Zhao, J.,Tao, X.,Wang, S.,&Reeves, G. D..(2018).Observation of Oblique Lower Band Chorus Generated by Nonlinear Three-Wave Interaction.GEOPHYSICAL RESEARCH LETTERS,45(13),6343-6352. |
MLA | Teng, S.,et al."Observation of Oblique Lower Band Chorus Generated by Nonlinear Three-Wave Interaction".GEOPHYSICAL RESEARCH LETTERS 45.13(2018):6343-6352. |
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