A Simulation of the Mid-and Low-latitude Ionospheric Electric Fields
A Simulation of the Mid-and Low-latitude Ionospheric Electric Fields
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中低纬度电离层电场的模拟
DOI：
10.11728/cjss2014.03.287
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发表时间：
2014-04
期刊：
影响因子：
--
通讯作者：
WAN Weixing
中科院分区：
文献类型：
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作者：
YU Tao;MAO Tian;XIA Chunliang;WAN Weixing
建立了中低纬度地区电离层电场的理论模型。在地磁偶极坐标系下，求解电离层发电机方程，分别推导电离层电势和电场。模型输入的主要参数，如中性风、电子、离子和中性粒子的密度和温度，都是从经验模型中获得的。由我们的模式得到的全球电离层电势和中低纬度的场与其他作者和经验模式提出的结果基本一致。利用我们的模式发现，HWM93风的日分量主要对垂直电场的形成有贡献，而半日分量主要对纬向电场的形成有贡献。最后，通过调整输入的F区风和电导率，可以消除模型与经验模型之间的大部分差异，并证明F区发电机对电场的贡献最大。
A theoretical model of ionospheric electric fields at mid-and low-latitudes is developed.In the geomagnetic dipolar coordinate system,the ionospheric dynamo equations were solved,and the ionospheric electric potential and electric field were derived respectively.Major parameters for the model inputs,such as the neutral winds,the densities and temperatures of electron,ions and neutrals,are obtained from empirical models.The global ionospheric electrical potential and field at mid-and low-latitudes derived from our model are largely in agreement with the results presented by other authors and the empirical model.Using our model,it is found that the diurnal component of the HWM93 wind mainly contributed to the formation of the vertical electric field,while the semidiurnal component mainly contributed to the zonal electric field.Finally,by adjustment of the input F region winds and conductivities,most discrepancies between our model and the empirical one can be eliminated,and it is proved that the F region dynamo is the most significant contribution to the electric fields.