DOI: 10.1002/2017JA024644
Scopus记录号: 2-s2.0-85040571651
论文题名: Interhemispheric Asymmetry of the Sunward Plasma Flows for Strongly Dominant IMF BZ > 0
作者: Yakymenko K.N. ; Koustov A.V. ; Fiori R.A.D.
刊名: Journal of Geophysical Research: Space Physics
ISSN: 21699380
出版年: 2018
卷: 123, 期: 1 起始页码: 315
结束页码: 325
语种: 英语
英文关键词: northward dominant IMF
; polar cap
; sunward flows
; SuperDARN radars
英文摘要: Super Dual Auroral Radar Network (SuperDARN) convection maps obtained simultaneously in both hemispheres are averaged to infer polar cap ionospheric flow patterns under strongly dominant positive interplanetary magnetic field (IMF) Bz component. The data set consisted of winter observations in the Northern Hemisphere simultaneously with summer observations in the Southern Hemisphere. Long-lasting high-latitude dayside reverse convection cells are shown to have faster sunward flows at near-magnetic noon hours in the summer/Southern Hemisphere. Sunward flows typically deviate from the midnight-noon meridian toward 10–11 h of magnetic local time in the summer/Southern Hemisphere and are more aligned with the midnight-noon meridian in the winter/Northern Hemisphere. Flow deviations in the winter/Northern Hemisphere can be both toward prenoon and postnoon hours, and there is no clear relationship between flow deviation and the IMF By component. No strong preference for the sunward flow occurrence depending on the IMF Bx polarity was found. In addition, the rate of the sunward flow speed increase in response to an increase in driving conditions was found to be comparable for the IMF Bx > 0 and Bx < 0. ©2017. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/114748
Appears in Collections: 气候减缓与适应
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作者单位: Institute of Space and Atmospheric Studies, University of Saskatchewan, Saskatoon, SK, Canada; Geomagnetic Laboratory, Natural Resources Canada, Ottawa, ON, Canada
Recommended Citation:
Yakymenko K.N.,Koustov A.V.,Fiori R.A.D.. Interhemispheric Asymmetry of the Sunward Plasma Flows for Strongly Dominant IMF BZ > 0[J]. Journal of Geophysical Research: Space Physics,2018-01-01,123(1)