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A theoretical model for mid- and low-latitude ionospheric electric fields in realistic geomagnetic fields

ISSN号：1006-8228
期刊名称：《计算机时代》
时间：0
分类：P51[天文地球—地质学]
作者机构：[1]Beijing Observatory for Space Environment, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029 China, [2]Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan 430071, China, [3]Graduate School of Chinese Academy of Sciences, Beijing 100049, China, [4]National Center for Space Weather, China Meteorological Administration, Beijing 100081, China
相关基金：Supported by the KIP Pilot Project of Chinese Academy of Sciences （Grant No. KZCX2-YW-123）, National Natural Science Foundation of China （Grant Nos. 40636032 and 40725014）, and National Basic Research Program of China （Grant No 2006CB806306）

作者： REN ZhiPeng[1,2,3], WAN WeiXing[1], WEI Yong[1,2,3], LIU LiBo[1], YU Tao[1,4]

关键词：中低纬度, 电子场, 磁场, 地理学, ionospheric dynamo, ionospheric electric fields, APEX coordinates

中文摘要：

地磁气的领域，在 ionospheric 发电机起重要作用，能极大地影响 ionospheric 电场，水流和另外的 ionospheric electrodynamics 现象的全球分发。在 ionospheric electrodynamics 现象的学习，例如 ionospheric 电场的纵的变化，地磁气的领域的非偶极的部件必须被考虑。在这篇论文，我们为 ionospheric 发电机推出一个理论电场模型在中间纬度、低纬度它采用一个修改的磁性的顶坐标系统。在新电场模型，地磁气的领域能从 IGRF 模型或偶极子领域被计算模型，和中立的风和传导性基于实验模型被计算。然后，为电的潜力的发电机方程最后以线每篇文字题目下作者的署名重复方法被解决，并且 ionospheric 电场和电流从计算潜力被导出。我们的模型能复制 ionospheric electrodynamics 过程的主要特征，因此它将是为上面的空气和电离层的调查的一个有用工具。

英文摘要：

The geomagnetic fields, which play important roles in the ionospheric dynamo, can greatly affect the global distribution of ionospheric electric fields, currents and other ionospheric electrodynamics phenomena. In the study of ionospheric electrodynamics phenomena, such as the longitudinal variations of ionospheric electric fields, the non-dipolar component of the geomagnetic fields must be taken into account. In this paper, we deduce a theoretical electric field model for ionospheric dynamo at mid- and low-latitude which adopt a modified magnetic apex coordinates system. In the new electric field model, the geomagnetic fields can be calculated from either the IGRF model or the dipole field model, and the neutral winds and conductivities are calculated based on empirical models. Then the dynamo equation for the electric potential is finally solved in terms of the line-by-line iteration method, and the ionospheric electric fields and currents are derived from the calculated potential. Our model can reproduce the main features of the ionospheric electrodynamics processes, so it will be a useful tool for the investigation of the upper atmosphere and ionosphere.

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