DOI: 10.1002/2015GL065736
论文题名: Effects of geographic-geomagnetic pole offset on ionospheric outflow: Can the ionosphere wag the magnetospheric tail?
作者: Barakat A.R. ; Eccles J.V. ; Schunk R.W.
刊名: Geophysical Research Letters
ISSN: 0094-9110
EISSN: 1944-8841
出版年: 2015
卷: 42, 期: 20 起始页码: 8288
结束页码: 8293
语种: 英语
英文关键词: ionospheric outflow
; magnetosphere
; particle in cell
; polar wind
Scopus关键词: Geomagnetism
; Ionosphere
; Ionospheric measurement
; Diurnal oscillations
; Geomagnetic activities
; ionospheric outflow
; Magnetospheric tail
; Northern Hemispheres
; Particle in cell
; Polar wind
; Southern Hemisphere
; Magnetosphere
; asymmetry
; geomagnetic field
; geomagnetic storm
; ionosphere
; magnetosphere
; Northern Hemisphere
; polar region
; Southern Hemisphere
; wind field
英文摘要: The generalized polar wind model was used to simulate the polar ionosphere during the September/October 2002 storm. The solar terminator moved across the polar caps in a diurnal oscillation during this equinox period. The main conclusions of this study are the following: (1) the terminator oscillation generates a diurnal oscillation in the total hemispheric fluxes of the polar wind from the ionosphere into the magnetosphere; (2) the diurnal oscillation of outflow in the Northern Hemisphere is 12 h out of phase with the Southern Hemisphere; (3) the H+ outflow flux is near its limiting value, so the oscillation is larger than the nonperiodic contributions (e.g., geomagnetic activity); and (4) the O+ flux is less than its limiting value, hence the diurnal oscillation is comparable to the non-periodic effects. The simulation suggests that the hemispherical asymmetry and periodicity of the total ion outflow could "wag the magnetospheric tail" and perhaps contribute to substorm triggering. Key Points The hemispheric integrated outflow fluxes have an oppositely phased diurnal oscillation The hemispheric integrated H+ outflow is dominated by the diurnal oscillation The hemispheric integrated O+ outflow also has a component associated with geomagnetic activity © 2015. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84946600988&doi=10.1002%2f2015GL065736&partnerID=40&md5=3907e1944fd83b87590d5d1ac09e2c94
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/8726
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: Center for Atmospheric and Space Science, Utah State University, Logan, UT, United States
Recommended Citation:
Barakat A.R.,Eccles J.V.,Schunk R.W.. Effects of geographic-geomagnetic pole offset on ionospheric outflow: Can the ionosphere wag the magnetospheric tail?[J]. Geophysical Research Letters,2015-01-01,42(20).