Variability of Extended Bipolar Regions

	Variability of Extended Bipolar Regions
	Song, W. B. ; Feng, X. S. ; Shen, F. ; Zhang, Y. Z.
刊名	Solar Physics
	2009
卷号	257 期号:1 页码:83-90
关键词	Magnetic fields Photosphere north-south asymmetry solar-cycle magnetic-fields evolution periodicities oscillations sunspots flux
ISSN号	0038-0938
通讯作者	北京8701信箱
英文摘要	Using NSO/Kitt Peak synoptic charts from 1975 to 2003, we group the main solar magnetic fields into two categories: one for active regions (ARs) and the other for extended bipolar regions (EBRs). Comparing them, we find that there exist three typical characteristics in the variability of EBRs: First, there exists a correlation between ARs and EBRs. The phase of EBR flux has a delay nearly two CRs. Second, we find that the EBR flux has two prominent periods at 1.79 years and 3.21 years. The 1.79-year period seems to only belong to large-scale magnetic features. Lastly, the North -aEuro parts per thousand South asymmetry of EBR flux is not very significant on a time scale of one solar cycle. However, during solar maxima, its dominance is found to shift from one hemisphere to the other.
学科主题	空间物理
收录类别	SCI
原文出处	http://www.springerlink.com/content/tg22811684432k21/fulltext.pdf
语种	英语
内容类型	期刊论文
源URL	[http://ir.cssar.ac.cn/handle/122/1129]
专题	国家空间科学中心_空间科学部
推荐引用方式 GB/T 7714	Song, W. B.,Feng, X. S.,Shen, F.,et al. Variability of Extended Bipolar Regions[J]. Solar Physics,2009,257(1):83-90.
APA	Song, W. B.,Feng, X. S.,Shen, F.,&Zhang, Y. Z..(2009).Variability of Extended Bipolar Regions.Solar Physics,257(1),83-90.
MLA	Song, W. B.,et al."Variability of Extended Bipolar Regions".Solar Physics 257.1(2009):83-90.