| 中低纬度电离层对太阳风状态的响应 |
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| 引用本文： | 徐文耀.中低纬度电离层对太阳风状态的响应[J].地球物理学报,1985,28(6):549-557. |
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| 作者姓名： | 徐文耀 |
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| 作者单位： | 中国科学院地球物理研究所 |
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| 摘 要： | 本文讨论了行星际磁场B2分量变化时内磁层和中低纬度电离层的响应.指出B2变化引起的磁层大尺度对流电场的变化在一定条件下有可能透入内磁层,并沿磁力线映射到中低纬度电离层,在那里产生电场和电流体系,从而使Sq电流体系发生畸变,并在地面磁场中反映出来.数值计算表明,当△B2<0时,Sq电流体系的焦点向东和向高纬移动,地面磁场会观测到数伽马的变化.这就为中低纬地磁观测诊断磁层和太阳风状态提供了一种可能性.此外,本文还用上述物理过程解释了赤道地区一些高空物理现象,如B2倒转时电离层漂移速度的变化,赤道磁场异常以及赤道q型偶现E层的消失等等.
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| 关 键 词： | 电离层电场 中低纬度 太阳风 内磁层 磁层对流 赤道面 行星际磁场 对流电场 E层 电流体系 |
| 收稿时间： | 1984-02-18 |
RESPONSE OF THE IONOSPHERE IN MIDDLE AND LOW LATITUDES TO THE STATE OF SOLAR WIND |
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| XU WEN-YAO.RESPONSE OF THE IONOSPHERE IN MIDDLE AND LOW LATITUDES TO THE STATE OF SOLAR WIND[J].Chinese Journal of Geophysics,1985,28(6):549-557. |
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| Authors: | XU WEN-YAO |
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| Institution: | Institute of Geophysics, Academia Sinica |
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| Abstract: | Eesponse of the inner magnetosphere and the ionosphere of middle and low latitudes to Bz variations of the interplanetary magnetic field is studied. It is pointed out that variations of the large-seale convective electric field in the magnetosphere arising from Bz variations will penetrate into the inner magnetosphere, and then map into the middle-low latitude ionosphere along magnetic field lines, producing a characteristic electric field and current system, which will distort the Sq current system and produce a measurable magnetic disturbance on the earth surface. Numerical calculation shows that when Bz<0,Sq current system Will shift eastward and toward high latitude, and a magnetic disturbance of a few gammas will be observed on the earth surface. This provides a posibility of diagnosing the state of solar wind and the magnetosphere by magnetic observations at middle and low latitudes. Besides, the above-mentioned mechanism can be used to explain some aeronomie phenomena in the equatorial region, such as variations of electron drift speed, equatorial magnetic anomaly, disappearance of equatorial-type sporadic E, etc.. |
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