Ionospheric effects of sudden stratospheric warmings in eastern Siberia region

被引：24
作者：
Polyakova, A. S. [1 ]
Chernigovskaya, M. A. [1 ]
Perevalova, N. P. [1 ]
机构：
[1] Russian Acad Sci, Inst Solar Terr Phys, Siberian Branch, Irkutsk 664003, Russia
来源：
JOURNAL OF ATMOSPHERIC AND SOLAR-TERRESTRIAL PHYSICS | 2014年 / 120卷
基金：
俄罗斯基础研究基金会;
关键词：
Ionospheric disturbances; GPS TEC; Sudden stratospheric warming; TOTAL ELECTRON-CONTENT;
D O I：
10.1016/j.jastp.2014.08.011
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：
Ionospheric effects observed in Russia's Asia region during sudden stratospheric warmings (SSWs) in the winters 2008/2009 and 2012/2013 corresponding to both extreme solar minimum and moderate solar maximum conditions have been examined. To detect the ionospheric effects which must have been induced by the SSWs, we have carried out a joint analysis of total electron content (TEC) global ionospheric maps (GIM), MLS (Microwave Limb Sounder, EOS Aura) measurements of vertical temperature profiles, as well as NCEP/NCAR and UKMO Reanalysis data. It has been revealed for the first time that during strong SSWs the amplitude of diurnal variation of TEC decreases nearly by half in the mid-latitude ionosphere. Besides, the intensity of TEC deviations from the background level increases during SSWs. It has also revealed that during SSW peak the midday TEC maximum considerably decreases, and the night/morning TEC increases compared to quiet days. The pattern of TEC response to SSW is shown to be identical for both quiet and disturbed geophysical conditions. (C) 2014 Elsevier Ltd. All rights reserved.
引用
收藏
页码：15 / 23
页数：9
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