DOI: 10.1002/2015GL066004
论文题名: Different types of whistler mode chorus in the equatorial source region
作者: Taubenschuss U. ; Santolík O. ; Graham D.B. ; Fu H. ; Khotyaintsev Y.V. ; Le Contel O.
刊名: Geophysical Research Letters
ISSN: 0094-9470
EISSN: 1944-9201
出版年: 2015
卷: 42, 期: 20 起始页码: 8271
结束页码: 8279
语种: 英语
英文关键词: chorus
; equatorial source
; Gendrin angle
; spectral gap
; wave normals
; whistler mode
Scopus关键词: Cyclotrons
; Transport properties
; chorus
; equatorial source
; Gendrin angle
; Spectral gap
; whistler mode
; Atmospherics
; electron
; equatorial dynamics
; geomagnetic storm
; magnetosphere
; polarization
; spacecraft
; spectral analysis
; waveform analysis
英文摘要: The Time History of Events and Macroscale Interactions during Substorms-D spacecraft crossed an active equatorial source region of whistler mode chorus rising tones on 23 October 2008. Rising tones are analyzed in terms of spectral and polarization characteristics, with special emphasis on wave normal angles. The latter exhibit large variations from quasi-parallel to oblique, even within single bursts, but seem to follow a definite pattern, which enables an unambiguous classification into five different groups. Furthermore, we discuss the frequently observed splitting of chorus bursts into a lower and an upper band around one half of the local electron cyclotron frequency. At chorus frequencies close to the gap, we find significantly lowered wave planarities and a tendency of wave normal angles to approach the Gendrin angle. Key Points Rare observation of chorus rising tones with/without gap in equatorial source region Systematic variation of chorus wave normal angles (WNA) with frequency Linear/nonlinear wave damping when WNA is close to Gendrin angle © 2015. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84946600011&doi=10.1002%2f2015GL066004&partnerID=40&md5=d7fcdca82c9c814c2f204aea953dec51
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/9085
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: Institute of Atmospheric Physics, Prague, Czech Republic
Recommended Citation:
Taubenschuss U.,Santolík O.,Graham D.B.,et al. Different types of whistler mode chorus in the equatorial source region[J]. Geophysical Research Letters,2015-01-01,42(20).