An Empirical Model for the Ionospheric Global Electron Content Storm-Time Response

被引：0
作者：
Shuhui Li
Roman Galas
Dietrich Ewert
Junhuan Peng
机构：
[1] China University of Geosciences (Beijing),School of Land Science and Technology
[2] Technische Universität Berlin,Department for Geodesy and Geoinformation Sciences
来源：
Acta Geophysica | 2016年 / 64卷
关键词：
ionosphere; GEC; geomagnetic ; index; time-weighted geomagnetic ; index; empirical model;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
By analyzing the variations of global electron content (GEC) during geomagnetic storm events, the ratio “GEC/GECQT” is found to be closely correlated with geomagnetic Kp index and time weighted Dst index, where GECQT is the quiet time reference value. Moreover, the GEC/GECQT will decrease with the increase of the solar flux F10.7 index. Furthermore, we construct a linear model for storm-time response of GEC. Eighty-two storm events during 1999–2011 were utilized to calculate the model coefficients, and the performance of the model was tested using data of 8 storm events in 2012 by comparing the outputs of the model with the observed GEC values. Results suggest that the model can capture the characteristics of the GEC variation in response to magnetic storms. The component describing the solar activity influence shows a counteracting effect with the geomagnetic activity component; and the influence of Kp index causes an increase of GEC, while the time weighted Dst index causes a decrease of GEC.
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页码：253 / 269
页数：16
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