摘要
利用全球定位系统（GPS）台网数据,研究了发生于2001年4月28～29日的三次孤立亚暴事件期间全球不同区域电离层的响应形态.对比分析了不同经纬度的电离层总电子含量（QTEC）对宁静日的偏离形态,讨论了扰动的产生机制并计算了特定区域极光电集流指数（AE）与总电子含量偏移量之间的相关系数,结果表明,孤立亚暴可以引起全球性的电离层扰动,引起垂直QTEC的最大偏离可达20 TECU（1TECU=10^16e·m^-2）以上.亚暴引起的电离层扰动形态与地方时密切相关,也随纬度位置变化.在没有电离层响应相互干扰的情况下,孤立亚暴的发生与电离层扰动具有较强的线性相关性,高纬区呈负相关,中低纬区呈正相关.
Three isolated substorms occurred during Apirl 28-29, 2001. Data of International GPS （Global Positioning System ） Service network is used to study the morphology of ionosphere response to these substorms. In comparison of the characteristics of QTEC deviations to its quiet time values in different latitudes and longitudes and correlation analysis of AE index to △QVTEC in Europe-Africa sector, we can obtain results as following： isolated substorm can arose globally large scale ionosphere disturbances with amplitude up to more than 20TECU（1TECU= 10^16 e·m^-2）. The disturbance status is strongly dependent on local time ,as well as latitudes. Without interferences between different responses, the occurrence of isolated substorm has strongly linear correlation with that of ionosphere disturbances. The negative correlation response appeared in high latitudes while positive correlation appeared in middle/low latitudes.
出处
《武汉大学学报（理学版）》
CAS
CSCD
北大核心
2007年第3期351-355,共5页
Journal of Wuhan University:Natural Science Edition
基金
国家自然科学基金(40574074
40390151
40604021)
国家杰出青年基金(40325012)
长江学者特聘教授基金资助项目
关键词
亚暴
电离层扰动
总电子含量
substorm
ionosphere disturbances
total electron content
