Nighttime anomaly of ionospheric electron density  

作　　者：XU JiYao LIU Xiao 

机构地区：[1]State Key Laboratory of Space Weather, National Space Science Center, Chinese Academy of Sciences [2]School of Mathematics and Information Science, Henan Normal University

出　　处：《Science China Earth Sciences》2016年第7期1517-1518,共2页中国科学（地球科学英文版）

摘　　要：The ionosphere is composed of a large number of electrons and ions, which are produced by the photoionization effect of the solar radiation on the neutral atmosphere. The altitude range of ionosphere is about 60–1000 km and varies with local time and other factors （e.g., solar and geomagnetic activity）. Although the ionosphere varies over multiply timescales, the diurnal variation is in the dominant position due to the sun’s photoionization effect.The ionosphere is composed of a large number of electrons and ions, which are produced by the photoionization effect of the solar radiation on the neutral atmosphere. The altitude range of ionosphere is about 60–1000 km and varies with local time and other factors (e.g., solar and geomagnetic activity). Although the ionosphere varies over multiply timescales, the diurnal variation is in the dominant position due to the sun’s photoionization effect. Consequently, it is expected that the ionospheric electron density increases

关 键 词：anomaly altitude neutral multiply latitude winter seasonal diurnal magnitude hemisphere 

分 类 号：P352[天文地球—空间物理学] O53[天文地球—地球物理学]