| 磁扰日的L电流体系 |
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| 引用本文： | 徐文耀.磁扰日的L电流体系[J].地球物理学报,1984,27(4):323-337. |
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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： | 用电离层风发电机理论,对不同的电导率模型分别计算了磁静日和磁扰日期间不同月相的理论L电流体系。磁静日的L电流主要分布在纬度0°-60°之间的白天一侧,与平均太阴月的L电流相比,白天一侧的电流强度增大了1.2-1.7倍,而夜间减小到十分之一。磁扰日的L电流体系在高纬度区形成特征的电流分布（Lp）。磁扰日期间,极光带电导率的增大不仅影响极光带和高纬度地区的电流分布,而且使中低纬度的L电流增强了20-30％,使赤道电急流增强约20％,并使中低纬电流涡的焦点向高纬移动了4°左右。
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| 关 键 词： | 电流体系 磁扰日 流涡 极光带 太阴月 月相 总强度 太阴日 磁静日 电离层电导率 |
| 收稿时间： | 1983-03-31 |
L CURRENT SYSTEMS ON DISTURBED DAYS |
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| XU WEN-YAO.L CURRENT SYSTEMS ON DISTURBED DAYS[J].Chinese Journal of Geophysics,1984,27(4):323-337. |
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| Authors: | XU WEN-YAO |
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| Institution: | Institute of Geophysics, Academia Sinica |
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| Abstract: | L current systems have been calculated for different lunar phases on magnetically quiet and disturbed days by use of ionospheric wind dynamo theory for different conductivity models. On quiet days, L currents are mainly in the daytime sector between 0°-60° of latitudes. As compared with the L currents of mean lunation, the daytime currents on quiet days are enhanced by a factor of 2.2-2.7, while the nighttime currents are ten times smaller than those for mean lunation. On disturbed days, a characteristic current system Lf is formed at high latitudes. Conductivity enhancement in the auroral belt affects the distribution of L currents in the belt and at high latitudes. At the same time, the currents at middle and low latitudes are enhanced by 20-30%, the equatorial electrojet is increased by about 20%, and the foci of mid-low latitudinal current vortices shift 4° toward high latitude. |
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