寒潮期间电离层TEC与地面天气参数的相关性

Correlation analysis between ionospheric TEC and ground weather parameters during cold wave

利用1996—2004年间武汉地区发生的寒潮事件,分析了寒潮过境前后该地区电离层电子总含量TEC的变化情况及TEC与地面温度、压强之间的相关情况.结果表明:1)寒潮过境前,TEC分别有不同程度的波动,在2～3d内完成一次升高和降低;2)在寒潮来临的标准日TEC有明显下降;3)寒潮过境后的5d内,TEC出现类似"M"形的波动;4)寒潮过境前后,地面温度、压强和TEC之间表现出一定的正(负)相关.

Based on the cold wave events happened in Wuhan during 1996 to 2004, this article analyzes the varia- tion of the ionospheric electronic density TEC and the correlations between TEC and ground temperature, TEC and ground pressure before and after the transit of three cold wave events. The results show that TEC fluctuates in differ- ent degrees and completes an increase then decrease process in 2-3 days before the cold wave transit;TEC decreases evidently on the standard day of the cold wave ; and TEC possesses a variation in M form in 5 days after the cold wave transit. Some positive or negative correlations exist between TEC and ground temperature, TEC and ground pressure before and after the transit of cold wave.