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首页> 外文期刊>Journal of Geophysical Research, A. Space Physics: JGR >The Midlatitude Trough and the Plasmapause in the Nighttime Ionosphere Simultaneously Observed by DEMETER During 2006-2009
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The Midlatitude Trough and the Plasmapause in the Nighttime Ionosphere Simultaneously Observed by DEMETER During 2006-2009

机译：中间纬度槽和等离子体层顶夜间电离层同时观测到2006 - 2009年期间得墨忒耳

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摘要

This paper concurrently investigates the midlatitude trough and the plasmapause positions in the ionosphere by colocated measurements of the electron density, electron temperature, and whistler count probed by DEMETER (Detection of Electro-Magnetic Emissions Transmitted from Earthquake Regions) satellite in the nighttime at 2230 LT (local time; 1900-0100 MLT, magnetic local time, mainly in the premidnight period) during the 4-year period of 2006-2009. More than 13,000 Detection of Electro-Magnetic Emissions Transmitted from Earthquake Regions orbits of the electron density and the electron temperature are used to search the trough position, while the same amount of the whistler count is employed to determine the plasmapause position at the satellite altitude. The plasmapause is more sensitive to solar activity, which moves equatorward 1.0-1.2° form the low to high solar activity of the study period. On the other hand, the midlatitude trough is more sensitive to seasonal variation, which shifts poleward 1.7-2.5° from the winter to summer month in the study period. The midlatitude trough usually appears in the poleward side of the plasmapause during the study period. Both of the midlatitude trough and the plasmapause move equatorward during the magnetic disturbed condition. For the magnetic disturbed Kp ≥ 6-, the midlatitude trough can appear in the equatorward side of the plasmapause.
机译：本文同时探讨了中间纬度槽和等离子体层顶位置在托管测量电离层的电子密度、电子温度和惠斯勒数对的得墨忒耳(检测电磁排放从地震地区)卫星在夜间2230 LT(当地时间;当地时间,主要是premidnight时期)2006 - 2009年四年期间。13000年检测电磁排放从地震区域的轨道电子密度和电子温度用于搜索槽位置,采用相同数量的惠斯勒计数确定的等离子体层顶位置卫星的高度。敏感的太阳活动,动作朝赤道方向1.0 - -1.2°形成低到高太阳能研究期间的活动。中间纬度槽更为敏感季节性变化,这变化两极从冬天到夏天月1.7 - -2.5°研究期间。出现在向极一侧的等离子体层顶在研究期间。槽和等离子体层顶朝赤道方向移动在磁干扰条件。磁干扰Kp≥6 -,中间纬度槽可以出现在的朝赤道方向一侧等离子体层顶。

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