DOI: 10.1002/2013GL058253
论文题名: RCM-E simulation of substorm growth phase arc associated with large-scale adiabatic convection
作者: Yang J. ; Wolf R.A. ; Toffoletto F.R. ; Sazykin S.
刊名: Geophysical Research Letters
ISSN: 0094-8338
EISSN: 1944-8069
出版年: 2013
卷: 40, 期: 23 起始页码: 6017
结束页码: 6022
语种: 英语
英文关键词: auroral arc
; magnetospheric convection
; substorm growth phase
Scopus关键词: Adiabatic convection
; Auroral arcs
; Equilibrium conditions
; Field aligned currents
; High resolution simulations
; Magnetic transitions
; Magnetospheric convection
; Substorm growth phase
; Magnetoplasma
; Magnetosphere
; Computer simulation
; adiabatic process
; aurora
; convection
; magnetic property
; magnetosphere
; mapping method
; numerical model
; resolution
; storm
英文摘要: Substorm auroral breakup often occurs on a longitudinally elongated arc at the end of a growth phase. We present an idealized high-resolution simulation with the Rice Convection Model-Equilibrium (RCM-E) to investigate how large-scale adiabatic convection under equilibrium conditions can give rise to an auroral arc. We find that a thin arc that maps to the magnetic transition region at r ~ 8 RE emerges in the late growth phase. The simulation implies that the arc in the premidnight sector is associated with a sheet of additional region 1 sense field-aligned current (FAC) just poleward of the main region 2 FAC, while the arc in the postmidnight sector is associated with the poleward portion of the main upward region 2 FAC. Explanations for the location and the thickness of the arc are proposed, based on the simulation. Key Points A thin arc is associated with upward FACs in both premidnight and postmidnight sectors The thin arc maps to 8 RE in the transition region Convection Front concept is proposed to explain location and thickness of an arc ©2013. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84889055924&doi=10.1002%2f2013GL058253&partnerID=40&md5=1bb62052dd0bc30d5464720d07471f26
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/5602
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, MS-108, 6100 Main St., Houston, TX 77005, United States
Recommended Citation:
Yang J.,Wolf R.A.,Toffoletto F.R.,et al. RCM-E simulation of substorm growth phase arc associated with large-scale adiabatic convection[J]. Geophysical Research Letters,2013-01-01,40(23).