GEOMAGNETIC DISTURBANCES AT F1-LAYER HEIGHTS UNDER DIFFERENT SOLAR ACTIVITY CONDITIONS OVER NORILSK

被引：0
|
作者：
Kushnarenko, G. P. [1 ]
Yakovleva, O. E. [1 ]
Kuznetsova, G. M. [1 ]
机构：
[1] Inst Solar Terr Phys SB RAS, Irkutsk, Russia
来源：
SOLAR-TERRESTRIAL PHYSICS | 2019年 / 5卷 / 02期
关键词：
geomagnetic disturbances; electron density; spring-fall asymmetry; ELECTRON-DENSITY;
D O I：
10.12737/stp-52201916
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：
We analyze the influence of geomagnetic disturbances on the electron density N-e at Norilsk ionospheric station (69 degrees N; 88 degrees E) at Fl-layer heights (120-200 km). For the analysis, we have selected 25 moderate and weak geomagnetic disturbances for two seasons - spring and fall - of 2003-2014. Using the N-e values obtained from measurements made with the Norilsk digisonde during this period, we analyze N-e variations during geomagnetic disturbances in spring and fall for a long period of time. We determine the effect of spring-fall asymmetry occurring in all solar activity phases and manifesting itself in a significant decrease in the electron density during the main phase of fall storms at all heights in comparison with quiet days: up to 2.6 times at a height of 200 km and slightly less at lower heights. This phenomenon is not observed during spring disturbances: Ne variations are much weaker.
引用
收藏
页码：113 / 115
页数：3
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