globalchange  > 科学计划与规划
DOI: 10.1002/2015GL064057
论文题名:
Anharmonic oscillatory flow braking in the Earth's magnetotail
作者: Panov E.V.; Wolf R.A.; Kubyshkina M.V.; Nakamura R.; Baumjohann W.
刊名: Geophysical Research Letters
ISSN: 0094-9112
EISSN: 1944-8843
出版年: 2015
卷: 42, 期:10
起始页码: 3700
结束页码: 3706
语种: 英语
英文关键词: anharmonic oscillation ; BBF ; oscillatory flow braking ; plasma sheet ; reconnection ; substorm
Scopus关键词: Frequency doublers ; Plasma sheaths ; Anharmonic ; BBF ; Oscillatory flows ; Plasma sheet ; Reconnection ; Substorms ; Oscillating flow ; magnetic field ; magnetometer ; magnetotail ; oscillating flow ; plasma ; probe ; volume change
英文摘要: Plasma sheet bursty bulk flows often oscillate around their equilibrium position at about 10 RE downtail. The radial magnetic field, pressure, and flux tube volume profiles usually behave differently earthward and tailward of this position. Using data from five Time History of Events and Macroscale Interactions during Substorms (THEMIS) probes, we reconstruct these profiles with the help of an empirical model and apply thin filament theory to show that the oscillatory flow braking can occur in an asymmetric potential. Thus, the thin filament oscillations appear to be anharmonic, with a power spectrum exhibiting peaks at both the fundamental frequency and the first harmonic. Such anharmonic oscillatory braking can explain the presence of the first harmonic in Pi2 pulsations (frequency doubling), which are simultaneously observed by magnetometers on the ground near the conjugate THEMIS footprints. ©2015. American Geophysical Union. All Rights Reserved.
URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84931564174&doi=10.1002%2f2015GL064057&partnerID=40&md5=4f031853ad47830b307b009688546d67
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/8728
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 Research Institute, Austrian Academy of Sciences, Graz, Austria

Recommended Citation:
Panov E.V.,Wolf R.A.,Kubyshkina M.V.,et al. Anharmonic oscillatory flow braking in the Earth's magnetotail[J]. Geophysical Research Letters,2015-01-01,42(10).
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