磁暴对夜间中低电离层影响的数值模拟

Numerical Simulation of Responses of the Magnetic Storm on the Ionosphere of Middle-Low Latitude at Night

从电子连续方程、电子运动方程以及离子运动方程出发 ,选用 IRI- 90电子浓度为磁暴初始时的浓度 ,并采用 HEDIN- 90剪切时变中性风模式 ,对中低纬电离层 F层在磁暴期间的变化形态进行了数值模拟研究 .模拟结果表明 :磁暴会引起电离层产生不同程度的扰动 ,在磁暴时存在的东西方向电场的作用下 ,电离层 F层峰产生垂直漂移 .不同情况的模拟表明 :不同强度的暴时电场会对电离层 F层产生不同的影响 ,并且纬度越低 F层受暴时电场的影响越大 。

With the electric continue equation, electrics and ions movement equation, this paper,which used IRI-90′s electric density as initial density and HEDIN-90′s neutral wind model, simulate influence of magnetic storm on the ionosphere of middle-low latitude. The result shows that : at the storm time, eastern electric field, the peak height of F-layer of ionosphere will drift vertically, the result also indicates: the lower the latitude, the more influence the F-layer will be.