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THE LONG-TERM HEMISPHERIC SUNSPOT ACTIVITY
Li KJ(李可军)1; Gao PX(高朋鑫)1,2; Zhan, LS3; Shi XJ(石祥军)1,2; Li, K (reprint author), CAS, Yunnan Observ, Natl Astron Observ, Kunming 650011, Peoples R China.
Source PublicationASTROPHYSICAL JOURNAL
2009-01-20
Volume691Issue:1Pages:75-82
DOI10.1088/0004-637X/691/1/75
Contribution Rank第1完成单位
Indexed BySCI
KeywordSun: Activity Sun: General Sunspots
AbstractSunspot activity is usually represented by either sunspot numbers (SN) or sunspot areas ( SA). The smoothed monthly mean SA and SN in the northern and southern hemispheres from 1945 January to 2008 March are used to investigate the characteristics of long-term hemispheric sunspot activity. Although sunspot activity ( SA and SN) is found to begin one month earlier in the northern hemisphere than in the southern hemisphere on the average of the considered time interval, the shift is so small that no long-term systematic phase shift is statistically acceptable as a first-order effect, as suggested by White & Trotter. Sunspot activity never peaks at the same time in the two hemispheres. Although the Schwabe cycle appears in hemispheric sunspot activity, its period length slightly varies during the considered time interval and seems to be longer in the southern hemisphere than in the northern hemisphere on the average. Sunspot activity is asymmetrically distributed in the hemispheres, but the largest hemispheric diversity usually does not appear around the maximum time of a cycle. The diversity of SA, respectively, in the northern and southern hemispheres runs on the Sun similarly and synchronously as the diversity of SN does. Sunspot activity is slightly asynchronous in the hemispheres.
Funding OrganizationNatural Science Funds of China [40636031, 10873032] ; 973 project [2006CB806300] ; Chinese Academy of Sciences
Language英语
Subject AreaAstronomy & Astrophysics
SubtypeArticle
ISSN0004-637X
URL查看原文
Archive Date2009-01-12
WOS IDWOS:000263196600007
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS KeywordNORTH-SOUTH ASYMMETRY ; NUMBERS R-N ; SOLAR-ACTIVITY ; CYCLE ; COHERENCE ; CATALOG ; PERIOD
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Cited Times:17[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/6151
Collection太阳物理研究组
Corresponding AuthorLi, K (reprint author), CAS, Yunnan Observ, Natl Astron Observ, Kunming 650011, Peoples R China.
Affiliation1.National Astronomical Observatories/Yunnan Observatory, CAS, Kunming 650011, China
2.School of Graduate, CAS, Beijing 100863, China
3.Jingdezhen Ceramic College, Jingdezhen 330001, China
First Author AffilicationYunnan Observatories, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Li KJ,Gao PX,Zhan, LS,et al. THE LONG-TERM HEMISPHERIC SUNSPOT ACTIVITY[J]. ASTROPHYSICAL JOURNAL,2009,691(1):75-82.
APA Li KJ,Gao PX,Zhan, LS,Shi XJ,&Li, K .(2009).THE LONG-TERM HEMISPHERIC SUNSPOT ACTIVITY.ASTROPHYSICAL JOURNAL,691(1),75-82.
MLA Li KJ,et al."THE LONG-TERM HEMISPHERIC SUNSPOT ACTIVITY".ASTROPHYSICAL JOURNAL 691.1(2009):75-82.
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