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Dependence of the Spring-Autumnal asymmetry in geomagnetic activity on the solar main dipole magnetic field polarity over last 140 years

文献类型：期刊论文

作者Sha, X. M.1,2; Du, A. M.1,2; Luo, H.1,2; Ge, Y. S.1,2; Zhang, Y.1
刊名PLANETARY AND SPACE SCIENCE
出版日期2018-09-01
卷号158页码:1-5
关键词Geomagnetic activity Solar dipole magnetic field SA asymmetry
ISSN号0032-0633
DOI10.1016/j.pss.2018.05.014
文献子类Article
英文摘要Spring-Autumnal asymmetry (SA asymmetry) from years 1873-2010 in the geomagnetic activity is investigated based on the geomagnetic indices (aa, Ap and Kp). Results have shown that in general the SA asymmetry of the geomagnetic activity appears to be alternation, except for the interval during which the change of dominant solar dipole magnetic field polarity occurs. Our study implies that both the polarity of the main solar dipole field and the north-south asymmetry of the sunspot area in the two solar hemispheres control the strength of the south component (Bs) of the interplanetary magnetic field (IMF) near the Earth and the resulting SA asymmetry of the geomagnetic activity in the corresponding seasons. A simple sector structure model is devised to establish the relationship between the polarity of solar main dipole magnetic field, the IMF Bs component and the corresponding SA asymmetry in the geomagnetic activity. This is confirmed by examining the solar wind parameters from the spacecraft observations during the recent decades.
WOS关键词SEMIANNUAL VARIATION ; INTERPLANETARY ; OSCILLATION ; INDEXES ; FLUX ; AP
WOS研究方向Astronomy & Astrophysics
语种英语
WOS记录号WOS:000440266000001
出版者PERGAMON-ELSEVIER SCIENCE LTD
资助机构National Natural Science Foundation of China(41574162 ; National Natural Science Foundation of China(41574162 ; National Basic Research Program of China(2014CB845903) ; National Basic Research Program of China(2014CB845903) ; 41674168) ; 41674168) ; National Natural Science Foundation of China(41574162 ; National Natural Science Foundation of China(41574162 ; National Basic Research Program of China(2014CB845903) ; National Basic Research Program of China(2014CB845903) ; 41674168) ; 41674168) ; National Natural Science Foundation of China(41574162 ; National Natural Science Foundation of China(41574162 ; National Basic Research Program of China(2014CB845903) ; National Basic Research Program of China(2014CB845903) ; 41674168) ; 41674168) ; National Natural Science Foundation of China(41574162 ; National Natural Science Foundation of China(41574162 ; National Basic Research Program of China(2014CB845903) ; National Basic Research Program of China(2014CB845903) ; 41674168) ; 41674168)
源URL[http://ir.iggcas.ac.cn/handle/132A11/88138]  
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Luo, H.
作者单位1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Earth & Planetary Phys, Beijing 100029, Peoples R China
2.Univ Chinese Acad Sci, Beijing, Peoples R China
推荐引用方式
GB/T 7714		 Sha, X. M.,Du, A. M.,Luo, H.,et al. Dependence of the Spring-Autumnal asymmetry in geomagnetic activity on the solar main dipole magnetic field polarity over last 140 years[J]. PLANETARY AND SPACE SCIENCE,2018,158:1-5.
APA Sha, X. M.,Du, A. M.,Luo, H.,Ge, Y. S.,&Zhang, Y..(2018).Dependence of the Spring-Autumnal asymmetry in geomagnetic activity on the solar main dipole magnetic field polarity over last 140 years.PLANETARY AND SPACE SCIENCE,158,1-5.
MLA Sha, X. M.,et al."Dependence of the Spring-Autumnal asymmetry in geomagnetic activity on the solar main dipole magnetic field polarity over last 140 years".PLANETARY AND SPACE SCIENCE 158(2018):1-5.

入库方式： OAI收割

来源：地质与地球物理研究所

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