摘要
中、低纬电离层Ｆ层动力学的数值模拟通过研究等离子体的连续性方程和运动方程进行．等离子体的输运过程在电磁漂移的运动坐标系中运算．计及双级扩散、温度、中性风、电磁漂移等影响．假设地磁场为偶极子场．氧原子为主要成分．结果表明：在磁静日时，赤道异常现象仅在白天出现在磁扰日时，当在向电场足够大时，可引起沿场排列不均匀结构，在夜间也可以出现赤道异常现象．
A numerical solution in the meridian plane of the full continuity equation for electrons in mid and low latitude F-region is investigated. The ionospheric plasma moving in the electromagnetic drift frame of reference, the dipolar approximation of geomagnetic field is assumed and O+ is regarded as the dominantion. The effects of ambipolar diffusion, neutral wind, electromagnetic drift, and temperature are taken into account. Numerical simulation results show that the phenomena of equatorial anomaly is only at daytime in geomagnetic quiet periods. During geomagnetic storms periods,strong eastward electric field may cause variations in the vertical drift of the equatorial ionosphere plasma, and hence form largesclae field-aligned irregularities and anomaly occurs even at nighttime.
出处
《华南师范大学学报（自然科学版）》
CAS
1996年第3期1-9,共9页
Journal of South China Normal University(Natural Science Edition)
基金
国家自然科学基金
关键词
电离层
F层
动力学
数值模拟
赤道异常
ionosphere
F-region
dynamics
numerical simulation
equatorial anomaly
