DOI: 10.1002/2014GL060707
论文题名: New evidence for generation mechanisms of discrete and hiss-like whistler mode waves
作者: Gao X. ; Li W. ; Thorne R.M. ; Bortnik J. ; Angelopoulos V. ; Lu Q. ; Tao X. ; Wang S.
刊名: Geophysical Research Letters
ISSN: 0094-9963
EISSN: 1944-9694
出版年: 2014
卷: 41, 期: 14 起始页码: 4805
结束页码: 4811
语种: 英语
英文关键词: generation mechanism
; nonlinear
; observational evidence
; THEMIS
; whistler mode waves
Scopus关键词: Geophysics
; Generation mechanism
; nonlinear
; observational evidence
; THEMIS
; Whistler-mode waves
; Earth sciences
; amplitude
; correlation
; experimental study
; linear programing
; nonlinear wave
; statistical analysis
; storm surge
; wave field
; wave generation
; wave modeling
; waveform analysis
英文摘要: Linear theory suggests that whistler mode wave growth rates are proportional to the ratio of hot electron (~1 to 30 keV) density to total electron density (Nh/Nt), whereas nonlinear wave theory suggests that an optimum linear growth rate is required to generate rising tone chorus from hiss-like emissions. Using the Time History of Events and Macroscale Interactions during Substorms waveform data collected by three probes over the past ~5 years, we investigate the correlation between Nh/N t and wave amplitude/wave occurrence rate for rising tone, falling tone, and hiss-like emissions separately. Statistical results show that the rising and falling tones preferentially occur in the region with a limited Nh/Nt range, whereas both the occurrence rate and wave amplitudes of hiss-like emissions become larger for higher values of N h/Nt. Our statistical results not only provide an important clue on the generation mechanism of hiss-like emissions, but also provide supporting experimental evidence for the nonlinear theory of generating rising tone chorus. © 2014. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84904220834&doi=10.1002%2f2014GL060707&partnerID=40&md5=fa7e949a7f5003826aa0f2a29b4ba0dc
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/7227
Appears in Collections: 气候减缓与适应
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作者单位: CAS Key Laboratory of Geospace Environment, Department of Geophysics and Planetary Science, University of Science and Technology of China, Hefei, China
Recommended Citation:
Gao X.,Li W.,Thorne R.M.,et al. New evidence for generation mechanisms of discrete and hiss-like whistler mode waves[J]. Geophysical Research Letters,2014-01-01,41(14).