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

被引：12
|
作者：
Li, Shuhui [1 ]
Galas, Roman [2 ]
Ewert, Dietrich [2 ]
Peng, Junhuan [1 ]
机构：
[1] China Univ Geosci, Sch Land Sci & Technol, Beijing, Peoples R China
[2] Tech Univ Berlin, Dept Geodesy & Geoinformat Sci, Berlin, Germany
来源：
ACTA GEOPHYSICA | 2016年 / 64卷 / 01期
基金：
中国国家自然科学基金;
关键词：
ionosphere; GEC; geomagnetic Kp index; time-weighted geomagnetic Dst index; empirical model; WEIGHTED MAGNETIC INDEXES; SOLAR-ACTIVITY; DISTURBANCES; AP(TAU);
D O I：
10.1515/acgeo-2015-0067
中图分类号：
P3 [地球物理学]; P59 [地球化学];
学科分类号：
0708 ; 070902 ;
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 GEC(QT) is the quiet time reference value. Moreover, the GEC/GEC(QT) 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.
引用
收藏
页码：253 / 269
页数：17
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