Different Contributions to Space Weather and Space Climate from Different Big Solar Active Regions

doi:10.3847/1538-4357/aaf64a

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	Different Contributions to Space Weather and Space Climate from Different Big Solar Active Regions
	Jiang,Jie 4; Song,Qiao 1; Wang,Jing-Xiu 2; Baranyi,Tünde 3
刊名	The Astrophysical Journal
	2019-01-18
卷号	871 期号:1
关键词	Sun: activity Sun: magnetic fields
ISSN号	0004-637X
DOI	10.3847/1538-4357/aaf64a
英文摘要	Abstract The purpose of this paper is to show that large active regions (ARs) with different magnetic configurations have different contributions to short-term and long-term variations of the Sun. As a case study, the complex δ-type AR 12673 and the simple β-type AR 12674 are investigated in detail. Since the axial dipole moment at cycle minimum determines the amplitude of the subsequent cycle and space climate, we have assimilated the individual observed magnetic configurations of these two ARs into a surface flux transport model to compare their contributions to the axial dipole moment D. We find that AR 12673 has a significant effect on D at the end of the cycle, making it weaker because of abnormal and complicated magnetic polarities. An initial strongly positive D ends up with a strongly negative value. The flare-poor AR 12674 has a greater contribution to the long-term axial dipole moment than the flare-rich AR 12673. We then carry out a statistical analysis of ARs larger than 800 μHem from 1976 to 2017. We use the flare index FI and define an axial dipole moment index DI to quantify the effects of each AR on space weather and space climate, respectively. Whereas the FI has a strong dependence on the magnetic configuration, the DI shows no such dependence. The DI is mainly determined by the latitudinal location and the latitudinal separation of the positive and negative magnetic fluxes of the ARs. Simple ARs have the same possibility as complex ARs to produce big DI values affecting space climate.
语种	英语
出版者	The American Astronomical Society
WOS记录号	IOP:0004-637X-871-1-AAF64A
内容类型	期刊论文
源URL	[http://ir.bao.ac.cn/handle/114a11/24694]
专题	中国科学院国家天文台
作者单位	1.Key Laboratory of Space Weather, National Center for Space Weather, China Meteorological Administration, Beijing 100081, People's Republic of China 2.Key Laboratory of Solar Activity, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, People's Republic of China 3.Debrecen Heliophysical Observatory (DHO), Konkoly Observatory, Research Centre for Astronomy and Earth Sciences, Hungarian Academy of Sciences, 4010 Debrecen, P.O. Box 30, Hungary 4.School of Space and Environment, Beihang University, Beijing, People's Republic of China; jiejiang@buaa.edu.cn
推荐引用方式 GB/T 7714	Jiang,Jie,Song,Qiao,Wang,Jing-Xiu,et al. Different Contributions to Space Weather and Space Climate from Different Big Solar Active Regions[J]. The Astrophysical Journal,2019,871(1).
APA	Jiang,Jie,Song,Qiao,Wang,Jing-Xiu,&Baranyi,Tünde.(2019).Different Contributions to Space Weather and Space Climate from Different Big Solar Active Regions.The Astrophysical Journal,871(1).
MLA	Jiang,Jie,et al."Different Contributions to Space Weather and Space Climate from Different Big Solar Active Regions".The Astrophysical Journal 871.1(2019).