Prediction of geomagnetic activity
Prediction of geomagnetic activity
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地磁活动预测
DOI：
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发表时间：
1993
期刊：
影响因子：
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通讯作者：
R. Smith
中科院分区：
文献类型：
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作者：
C. Goertz;Lin;R. Smith
基于前侧重联和尾部力平衡，推导了直接驱动的绝热太阳风-磁层-电离层耦合的简单解析模型。磁层-电离层耦合通过阿尔文波发生，阿尔文波由磁层中电场的变化驱动。该模型提供了一种算法，可以根据观测到的太阳风变化计算极光电射流的直接驱动部分。 1979 年 5 月的两天，AE 的预测和观测之间的互相关性大于 0.9。这表明这两天的大部分地磁活动是由太阳风直接驱动的。
A simple analytic model for the directly driven, adiabatic solar wind-magnetosphere-ionosphere coupling is derived on the basis of frontside reconnection and force balance in the tail. Magnetosphere-ionosphere coupling occurs through Alfven waves which are driven by changes of electric fields in the magnetosphere. The model provides an algorithm which calculates the directly driven part of the auroral electrojets from an observed solar wind variation. For two days in May 1979 the cross correlation between the prediction and observation of AE is greater than 0.9. This suggests that most of the geomagnetic activity during these two days was directly driven by the solar wind.