Effects of Field-Aligned Currents on the Structure of the Ionosphere
Effects of Field-Aligned Currents on the Structure of the Ionosphere
复制标题
场对准电流对电离层结构的影响
DOI：
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发表时间：
1968
期刊：
影响因子：
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通讯作者：
C. Fälthammar
中科院分区：
文献类型：
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作者：
L. Block;C. Fälthammar
从理论上研究了沿磁场线的电流对高纬度F层电离层的影响。结果表明，如果必须在电离层中产生电荷载流子，则任一符号的电流都会导致总电子含量和最大密度的减少。低能量降水导致相应增加。对于 10-6 安培/平方米的离子电流或 10-3 安培/平方米的电子电流，顶部电离层可以达到极低的密度。观察证据表明电流至少为 10-6 安培/平方米。有人认为，电离层槽、F层风暴和其他类似效应可以通过场对准电流或等离子体扩散来解释，这也可以由本理论定量解释。
The influence of electric currents along the magnetic field lines on the high-latitude F-layer ionosphere is investigated theoretically. It is shown that a current of either sign leads to a reduction of the total electron content and the maximum density, if the charge carriers have to be produced in the ionosphere. Low-energy precipitation leads to a corresponding increase. Extremely low densities in the topside ionosphere may be reached for ion currents of the order of 10-6 amp/m2 or electron currents of 10-3 amp/m2. Observational evidence exists for currents at least of the order of 10-6 amp/m2. It is suggested that the ionospheric trough, the F-layer storm, and other similar effects may be explained by field-aligned currents or plasma diffusion, which is also quantitatively accounted for by the present theory.