低能电子沉降对南极中山站电离层的影响

本文针对中山站白天处于极尖区的特点，研究了低能电子沉降对中山站电离层的影响。采用高纬软粒子区的电子谱，计算了中山站低能电子引起的电离率，估算了该电离率导致的电离层电子密度的增加。计算结果表明，低能粒子不仅对Ｆ区电子密度有较大的影响，而且还是白天峰值高度升高的可能原因之一。

THE EFFECTS OF LOW ENERGY ELECTRON PRECIPITATION ON THE IONOSPHERE OVER ZHONGSHAN STATION,ANTARCTICA

In this paper,the effects of low energy electron precipitation on the ionosphere over Zhongshan Station have been investigated. The characteristic energy and the energy flux of the electron over the Zhongshan Station have evident high latitude characteristics. The ionization rates due to the precipitation of the electrons with various energies are calculated. It can be seen from the results that the low energy electrons are absorbed mainly in the F region. But the high energy electrons can reach the E region. This will result in the occurrence of the particle E layer. Finally, we use “soft zone” electron spectrum to calculate the ionization rate due to the low energy electron precipitation and use the ionization rate to estimate the increase in electron density. The results show that the low energy electron precipitation not only has the great effects on the F region electron density but is one of the reasons to cause the increase in the height of peak.