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Equatorial ionospheric electrodynamics during solar flares

文献类型：期刊论文

作者Zhang, Ruilong1,2,3; Liu, Libo1,2,3; Le, Huijun1,2,3; Chen, Yiding1,2,3
刊名GEOPHYSICAL RESEARCH LETTERS
出版日期2017-05-28
卷号44期号:10页码:4558-4565
ISSN号0094-8276
DOI10.1002/2017GL073238
文献子类Article
英文摘要Previous investigations on ionospheric responses to solar flares focused mainly on the photoionization caused by the increased X-rays and extreme ultraviolet irradiance. However, little attention was paid to the related electrodynamics. In this letter, we explored the equatorial electric field (EEF) and electrojet (EEJ) in the ionosphere at Jicamarca during flares from 1998 to 2008. It is verified that solar flares increase dayside eastward EEJ but decrease dayside eastward EEF, revealing a negative correlation between EEJ and EEF. The decreased EEF weakens the equatorial fountain effect and depresses the low-latitude electron density. During flares, the enhancement in the Cowling conductivity may modulate ionospheric dynamo and decrease the EEF. Besides, the decreased EEF is closely related to the enhanced ASY-H index that qualitatively reflects Region 2 field-aligned current (R2 FAC). We speculated that solar flares may also decrease EEF through enhancing R2 FAC that leads to an overshielding-like effect.
WOS关键词LATITUDE IONOSPHERE ; COUNTER ELECTROJET ; GEOMAGNETIC H ; NETWORK DATA ; GPS NETWORK ; FIELD ; RESPONSES ; DRIFT
WOS研究方向Geology
语种英语
出版者AMER GEOPHYSICAL UNION
WOS记录号WOS:000404131900022
资助机构National Natural Science Foundation of China(41231065 ; National Natural Science Foundation of China(41231065 ; Chinese Academy of Sciences(KZZD-EW-01-3) ; Chinese Academy of Sciences(KZZD-EW-01-3) ; National Important Basic Research Project of China(2012CB825604) ; National Important Basic Research Project of China(2012CB825604) ; 41621063) ; 41621063) ; National Natural Science Foundation of China(41231065 ; National Natural Science Foundation of China(41231065 ; Chinese Academy of Sciences(KZZD-EW-01-3) ; Chinese Academy of Sciences(KZZD-EW-01-3) ; National Important Basic Research Project of China(2012CB825604) ; National Important Basic Research Project of China(2012CB825604) ; 41621063) ; 41621063) ; National Natural Science Foundation of China(41231065 ; National Natural Science Foundation of China(41231065 ; Chinese Academy of Sciences(KZZD-EW-01-3) ; Chinese Academy of Sciences(KZZD-EW-01-3) ; National Important Basic Research Project of China(2012CB825604) ; National Important Basic Research Project of China(2012CB825604) ; 41621063) ; 41621063) ; National Natural Science Foundation of China(41231065 ; National Natural Science Foundation of China(41231065 ; Chinese Academy of Sciences(KZZD-EW-01-3) ; Chinese Academy of Sciences(KZZD-EW-01-3) ; National Important Basic Research Project of China(2012CB825604) ; National Important Basic Research Project of China(2012CB825604) ; 41621063) ; 41621063)
源URL[http://ir.iggcas.ac.cn/handle/132A11/50255]  
专题地质与地球物理研究所_中国科学院地球与行星物理重点实验室
通讯作者Liu, Libo
作者单位1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Earth & Planetary Phys, Beijing, Peoples R China
2.Chinese Acad Sci, Beijing Natl Observ Space Environm, Inst Geol & Geophys, Beijing, Peoples R China
3.Univ Chinese Acad Sci, Coll Earth Sci, Beijing, Peoples R China
推荐引用方式
GB/T 7714		 Zhang, Ruilong,Liu, Libo,Le, Huijun,et al. Equatorial ionospheric electrodynamics during solar flares[J]. GEOPHYSICAL RESEARCH LETTERS,2017,44(10):4558-4565.
APA Zhang, Ruilong,Liu, Libo,Le, Huijun,&Chen, Yiding.(2017).Equatorial ionospheric electrodynamics during solar flares.GEOPHYSICAL RESEARCH LETTERS,44(10),4558-4565.
MLA Zhang, Ruilong,et al."Equatorial ionospheric electrodynamics during solar flares".GEOPHYSICAL RESEARCH LETTERS 44.10(2017):4558-4565.

入库方式： OAI收割

来源：地质与地球物理研究所

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