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Cyclic behavior of solar full-disk activity
Li KJ(李可军)1; Li QX(李启秀)1,2; Gao PX(高朋鑫)1,2; Shi XJ(石祥军)1,2; Li, KJ (reprint author), Chinese Acad Sci, Natl Astron Observ, Yunnan Observ, Kunming 650011, Peoples R China.
Source PublicationJOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
2008-11-29
Volume113Issue:A11
DOI10.1029/2007JA012846
Contribution Rank第1完成单位
Indexed BySCI
AbstractIn order to describe the cyclic behavior of solar full-disk activity (the surface magnetic fields, filaments, the green Fe XIV, 5303 angstrom corona local maxima intensities, and torsional oscillations), we propose a new concept, a "full-disk activity cycle,'' which consists of two successive normal cycles: a high-latitude activity cycle following a low-latitude activity cycle. When solar activity begins to progress into a full-disk activity cycle, it latitudinally rushes to the poles, starting from middle latitudes (about 40 degrees) at about a normal cycle minimum. At the solar poles, magnetic polarity reversal takes place on both the solar hemispheres, and opposite reversals occur on the opposite hemispheres; resultingly, the new appearing magnetic polarity at high latitudes on a hemisphere will become the leading magnetic polarity of regions at low latitudes on the same hemisphere in the following normal cycle. After the latitudinal drift of solar activity reaches the solar poles at about the maximum time of the normal cycle, solar activity begins to latitudinally migrate in a reverse direction; it moves toward the equator continually till almost arriving at the solar equator and lasting for about 1.5 normal cycles. When a full-disk activity cycle progresses from a high-latitude activity cycle into a low-latitude activity cycle, the next full-disk activity cycle begins. Two successive full-disk activity cycles have a normal cycle overlapped in time but are spatially separated. The characteristics of full-disk activity cycles are summarized as well. At present we do not know why a full-disk activity cycle begins at midlatitudes; it is perhaps related with solar differential rotation. Further work is required to uncover the physical mechanisms behind the concept.
Funding OrganizationNatural Science Funds of China(40636031, 10573034) ; 973 project(2006CB806300) ; Chinese Academy of Sciences
Language英语
Subject AreaAstronomy & Astrophysics
SubtypeArticle
ISSN0148-0227
URL查看原文
Archive Date2008-12-03
WOS IDWOS:000261247600001
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS KeywordPOLAR MAGNETIC-FIELDS ; GREEN CORONA ; TORSIONAL OSCILLATIONS ; BUTTERFLY DIAGRAM ; SUN ; PROMINENCES ; ASYMMETRY ; FILAMENTS ; DYNAMICS ; MINIMUM
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Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/6117
Collection太阳物理研究组
Corresponding AuthorLi, KJ (reprint author), Chinese Acad Sci, Natl Astron Observ, Yunnan Observ, Kunming 650011, Peoples R China.
Affiliation1.Yunnan Observatory, National Astronomical Observatories, Chinese Academy of Sciences, Kunming, China
2.Graduate University of Chinese Academy of Sciences, Beijing, China
First Author AffilicationYunnan Observatories, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Li KJ,Li QX,Gao PX,et al. Cyclic behavior of solar full-disk activity[J]. JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS,2008,113(A11).
APA Li KJ,Li QX,Gao PX,Shi XJ,&Li, KJ .(2008).Cyclic behavior of solar full-disk activity.JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS,113(A11).
MLA Li KJ,et al."Cyclic behavior of solar full-disk activity".JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS 113.A11(2008).
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