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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.
发表期刊ASTROPHYSICAL JOURNAL
2009-01-20
卷号691期号:1页码:75-82
DOI10.1088/0004-637X/691/1/75
产权排序第1完成单位
收录类别SCI
关键词Sun: Activity Sun: General Sunspots
摘要Sunspot 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.
项目资助者Natural Science Funds of China [40636031, 10873032] ; 973 project [2006CB806300] ; Chinese Academy of Sciences
语种英语
学科领域Astronomy & Astrophysics
文章类型Article
ISSN0004-637X
URL查看原文
归档日期2009-01-12
WOS记录号WOS:000263196600007
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
关键词[WOS]NORTH-SOUTH ASYMMETRY ; NUMBERS R-N ; SOLAR-ACTIVITY ; CYCLE ; COHERENCE ; CATALOG ; PERIOD
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文献类型期刊论文
条目标识符http://ir.ynao.ac.cn/handle/114a53/6151
专题太阳物理研究组
通讯作者Li, K (reprint author), CAS, Yunnan Observ, Natl Astron Observ, Kunming 650011, Peoples R China.
作者单位1.National Astronomical Observatories/Yunnan Observatory, CAS, Kunming 650011, China
2.School of Graduate, CAS, Beijing 100863, China
3.Jingdezhen Ceramic College, Jingdezhen 330001, China
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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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