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本文详细地分析了１９９０年３月至１９９１年２月南极中山站电离层Ｆ２层临界频率ｆｏＦ２、Ｆ层最低虚高ｈ＇Ｆ的变化特性。分析结果表明，中山站的ｆｏＦ２日变化不呈现明显的ＵＴ效应，季节变化具有冬季异常特征。ｈ＇Ｆ的夏季曲线和冬季曲线呈现出十分不同的图样。文章的最后给出了若干典型的电子浓度剖面分布。
In this paper, the variations of the critical frequency foF2 of the F2 layer in the ionosphere of Zhongshan Station in Antarctica from March 1990 to February 1991 and the lowest hf of the F layer are analyzed in detail. The analysis results show that the daily variation of foF2 in Zhongshan Station is not obvious, and the seasonal variation has the characteristics of winter anomaly. The summer and winter curves of h’F show very different patterns. At the end of the article, we give some typical distributions of electron concentration profiles.