Regional estimation of electric fields and currents in the polar ionosphere
Regional estimation of electric fields and currents in the polar ionosphere
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极地电离层电场和电流的区域估计
DOI：
10.1029/94gl03076
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发表时间：
1995
影响因子：
5.2
通讯作者：
S. Nozawa
中科院分区：
文献类型：
--
作者：
Mariko Sato;Y. Kamide;A. Richmond;A. Brekke;S. Nozawa
提出了一种新的技术，估计电场和电流在一个局部区域的高纬度电离层结合两个磁图反演算法。本文介绍了该方法的概念和实际步骤，以及我们的工作中，这种新的方案被应用到北方斯堪的纳维亚半岛，在一个小规模的电离层参数计算的第一个结果。检查这些参数和降水粒子的纬向剖面，它被发现，在早晨部门的最强降水的区域位于赤道的最强电场的区域。为了评估电离层和磁层效应的相对重要性，将场向电流分为两个分量：（E）· E和（E）· E。这两个分量在合成的场向电流中通常给出相反的方向。这两个分量的相对强度似乎随纬度而有很大的变化。
A new technique is presented to estimate electric fields and currents in a localized region of the high-latitude ionosphere by combining two magnetogram-inversion algorithms. This paper describes the concept and practical procedures of the method as well as the first results of our efforts in which this new scheme is applied to northern Scandinavia, computing the ionospheric parameters on a small scale. Examining latitudinal profiles of these parameters and precipitating particles, it is found that the region of the most intense precipitation in the morning sector is located equatorward of the region of the strongest electric field. To evaluate the relative importance of ionospheric and magnetospheric effects, the field-aligned current is divided into two components: (∇Σ) · E and Σ∇ · E. These two components give often the opposite directions in the resultant field-aligned currents. The relative strength of the two components appears to vary considerably with latitude.