DOI: 10.1002/2015GL064145
论文题名: Generation of nonlinear electric field bursts in the outer radiation belt through the parametric decay of whistler waves
作者: Agapitov O.V. ; Krasnoselskikh V. ; Mozer F.S. ; Artemyev A.V. ; Volokitin A.S.
刊名: Geophysical Research Letters
ISSN: 0094-9287
EISSN: 1944-9018
出版年: 2015
卷: 42, 期: 10 起始页码: 3715
结束页码: 3722
语种: 英语
英文关键词: electron acoustic waves
; nonlinear structure formation
; parametric decay of whistlers
Scopus关键词: Acoustic wave propagation
; Acoustic waves
; Acoustics
; Earth atmosphere
; Electric fields
; Electrons
; Ionizing radiation
; Probes
; Radiation belts
; Bicoherence analysis
; Electron acoustic waves
; Nonlinear structure
; Outer radiation belt
; Parametric decay
; Parametric interactions
; Three-wave interactions
; Van allen radiation belts
; Atmospherics
; acoustic wave
; electric field
; electromagnetic radiation
; electromagnetic wave
; magnetic field
; nonlinearity
; wave generation
; wave propagation
; Pachycephalidae
英文摘要: Huge numbers of different nonlinear structures (double layers, electron holes, nonlinear whistlers, etc., referred to as Time Domain Structures, TDS) have been observed by the electric field experiment on the Van Allen Probes. Some of them are associated with whistler waves. Such TDS often emerge on the forward edges of the whistler wave packets and form chains. The parametric decay of a whistler wave into a whistler wave propagating in the opposite direction and an electron acoustic wave is studied experimentally as well as analytically, using Van Allen Probes data. The resulting electron acoustic wave is considered to be the source of electron scale TDS. The measured parameters of the three waves (two whistlers and the electron acoustic wave) are in good agreement with an assumption of their parametric interaction: ω0 =ω1 +ω2 and k→0=k→1+k→2. The bicoherence analysis shows the nonlinear nature of the observed electron-acoustic waves as well as the whistler wave and electron acoustic wave phase relation. The estimated decay instability growth rate shows that the process of three-wave interaction can develop in a characteristic time smaller than 1 s, thus, the process is rapid enough to explain the observations. This induced parametric interaction can be one of the mechanisms for quasiperiodic TDS generation in the outer Van Allen radiation belt. ©2015. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84931565382&doi=10.1002%2f2015GL064145&partnerID=40&md5=6c86cc16bb99f418b62e8d57d89b2ffa
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/8903
Appears in Collections: 科学计划与规划 气候变化与战略
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作者单位: Space Sciences Laboratory, University of California, Berkeley, CA, United States
Recommended Citation:
Agapitov O.V.,Krasnoselskikh V.,Mozer F.S.,et al. Generation of nonlinear electric field bursts in the outer radiation belt through the parametric decay of whistler waves[J]. Geophysical Research Letters,2015-01-01,42(10).