DOI: 10.1002/2014GL059840
论文题名: RCM-E simulation of a thin arc preceded by a north-south-aligned auroral streamer
作者: Yang J. ; Toffoletto F.R. ; Wolf R.A.
刊名: Geophysical Research Letters
ISSN: 0094-10124
EISSN: 1944-9855
出版年: 2014
卷: 41, 期: 8 起始页码: 2695
结束页码: 2701
语种: 英语
英文关键词: auroral arc
; bubbles
; bursty bulk flows
; entropy
; substorm growth phase
Scopus关键词: Bubbles (in fluids)
; Earth sciences
; Entropy
; Geophysics
; All-sky imager
; Auroral arcs
; Bubble injection
; Bursty bulk flow
; Magnetic transitions
; Plasma sheet
; Substorm growth phase
; Transition regions
; Plasma sheaths
; atmospheric modeling
; aurora
; bubble
; entropy
; geomagnetic storm
; ionosphere
; magnetosphere
; plasma
; satellite mission
英文摘要: The Time History of Events and Macroscale Interactions during Substorms (THEMIS) all-sky imager data have recently revealed a repeatable sequence that occurs during many auroral substorms, in which a newly formed thin arc is preceded by an equatorward propagating streamer. The paper aims at modeling this sequence using the Rice Convection Model-Equilibrium. The simulation shows a thin arc arising when a plasma sheet bubble with its PV5/3 reduced to the transition region value arrives at the magnetic transition region. The modeled thin arc consists of two parts: the one east of the streamer is the result of the bubble pushing high PV5/3 flux tubes ahead of it, strengthening the upward region 2 current, and the one west of the streamer is associated with westward drifting bubble particles, sliding along the transition region. The model predicts that (1) the westward and eastward leading edges of the thin arc propagate azimuthally at a speed of ~0.5-2.7km/s and (2) the streamer-induced thin arc is accompanied by classic signatures of bubble injections. Key Points The streamer-induced thin arc is another ionospheric manifestation of a bubble A bubble may trigger a thin arc if it can reach the transition region The westward and eastward leading edges of the arc propagate azimuthally ©2014. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84899042054&doi=10.1002%2f2014GL059840&partnerID=40&md5=996fee7cc2f31935f37004c98be23aed
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/7388
Appears in Collections: 气候减缓与适应
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作者单位: Department of Physics and Astronomy, Rice University, Houston, TX, United States
Recommended Citation:
Yang J.,Toffoletto F.R.,Wolf R.A.. RCM-E simulation of a thin arc preceded by a north-south-aligned auroral streamer[J]. Geophysical Research Letters,2014-01-01,41(8).