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Variability of Extended Bipolar Regions
Song, W. B.; Feng, X. S.; Shen, F.; Zhang, Y. Z.; 北京8701信箱
Source PublicationSolar Physics
KeywordMagnetic Fields Photosphere North-south Asymmetry Solar-cycle Magnetic-fields Evolution Periodicities Oscillations Sunspots Flux
AbstractUsing 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.
Indexed BySCI
Funding Project中国科学院空间科学与应用研究中心
Document Type期刊论文
Corresponding Author北京8701信箱
Recommended Citation
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.,&北京8701信箱.(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.
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