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

页码：113 / 115

页数：3

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