电离层电子总量与地磁活动

电离层电子总量与地磁活动 THE IONOSPHERIC TEC AND GEOMAGNETIC ACTIVITY 黄天锡 HUANG TIANXI 1 first-author 中国科学院武汉物理研究所 中国科学院武汉物理研究所 Wuhan Institute of Physics, Academia Sinica Wuhan Institute of Physics, Academia Sinica 本文论述在太阳宁静年份于西地中海区域的一般地磁活动和磁暴对电离层电子总量（TEC）的影响,并对武汉上空F层临界频率的暴时变化进行相应分析。结果表明,冬季夜间TEC值及其相对增长和绝对增长,同磁情指数Ap有一种负相关关系,即反向相关关系。对静年中一次大磁暴的三台站记录的分析,得知磁暴引发的TEC突起和凋落相对值达三分之一,暴情不容忽视。然而,峰年前后TEC绝对值暴时变幅是静年时的二至五倍。变幅绝对值的这种倍增情况同季节和地磁一电离层暴情有关.尤其同太阳活动有关。 In the present paper, the influence of general geomagnetic activity and principal storm on the ionospheric TEC above the Western Mediterranean during solar minimum and corresponding foF 2 storm-time variation over Wuhan are discussed. The results show that the winter nighttime TEC and its relative and absolute enhancements have an anti-correlation with moderate magnetic index Ap. From the analysis of a severe magnetic disturbance recorded at three stations in quiet solar period it is noted that TEC increase and depletion with regard to magnetic storm reach one third which is not negligible. The absolute TEC variation during storm-time at solar maximum, however, is 2—5 times as much as that at solar minimum, indicating that the TEC variaton is related to the seasons and geomagneto-ionospheric storm details, especially to the solar phase. 1983-03-01 2021-04-01 3