An examination of inter-hemispheric conjugacy in a subauroral polarization stream

Kunduri B.S.R.; Baker J.B.H.; Ruohoniemi J.M.Clausen L.B.N.Grocott A.Thomas E.G.Freeman M.P.Talaat E.R.

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An examination of inter-hemispheric conjugacy in a subauroral polarization stream

机译：考试的半球内共轭性subauroral极化流

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During geomagnetically disturbed conditions the midlatitude ionosphere is subject to intense poleward directed electric fields in the dusk-midnight sector. These electric fields lead to the generation of a latitudinally narrow westward directed flow channel in the subauroral region called a subauroral polarization stream (SAPS). If the magnetic field lines are treated as equipotentials, electrodynamic events such as SAPS are expected to occur simultaneously at magnetically conjugate locations with similar features. In this paper we present simultaneous observations of a SAPS event in both hemispheres made by midlatitude SuperDARN radars with conjugate fields-of-view. We analyze the relation between the geomagnetic conditions and the characteristics of the channels such as latitudinal location, electric field, total potential variations across the channels, and Pedersen current. The results suggest a strong correlation between the strength of the ring current and the latitudinal location of the channel. An inter-hemispheric comparison of the characteristics of the channel indicates that the potential variations across the channels are similar while the electric fields, Pedersen currents and latitudinal widths of the channel exhibit differences that are consistent with equal potential variations. We attribute these differences to seasonal differences in ionospheric conductivity between the hemispheres and magnetic distortion effects in the inner magnetosphere.

机译：在眼睛不安的条件中间纬度电离层受到激烈向极电场中dusk-midnight部门。生成的纬度的缩小西直接subauroral流道地区称为subauroral极化流(削弱了)。等势,电动式等事件削弱了预计将同时发生磁共轭位置相似特性。在两个半球削弱了事件的观察由中间纬度SuperDARN雷达共轭的视野。在地磁环境和之间等渠道的特征纬度位置、电场潜在的变化在通道和皮德森电流。环的强度之间的相关性当前的纬度位置通道。特征表明该频道整个通道是潜在的变化她类似的电场水流和纬度的宽度的通道表现出一致的差异平等的潜在变化。不同季节的差异电离层电导率之间的半球和磁场畸变的影响磁气圈。

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《Journal of Geophysical Research, A. Space Physics: JGR》 |2012年第8期|A08225-1-A08225-17|共17页
作者
Kunduri B.S.R.; Baker J.B.H.; Ruohoniemi J.M.Clausen L.B.N.Grocott A.Thomas E.G.Freeman M.P.Talaat E.R.;
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作者单位

Institute of Geophysics and Extraterrestrial Physics, Braunschweig, Germany;

Bradley Department of Electrical and Computer Engineering, Virginia Polytechnic and State University, 1991 Kraft Dr., Ste. 2019, Blacksburg, VA 24060, United States;

Johns Hopkins University Applied Physics Laboratory, Laurel, MD, United StatesBritish Antarctic Survey, Cambridge, United KingdomDepartment of Physics and Astronomy, University of Leicester, Leicester, United Kingdom;

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正文语种英语
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关键词
Pedersen currents; ionospheric conductivity; Electric fieldsConjugatesRing current (molecular)PolarizationstreamsHemisphere;

机译：皮德森电流;电离层电动fieldsConjugatesRing电导率;当前PolarizationstreamsHemisphere(分子);

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An examination of inter-hemispheric conjugacy in a subauroral polarization stream

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