THE LONG-TERM HEMISPHERIC SUNSPOT ACTIVITY

	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
刊名	ASTROPHYSICAL JOURNAL
	2009-01-20
卷号	691 期号:1 页码:75-82
关键词	Sun: activity Sun: general sunspots
ISSN号	0004-637X
通讯作者	Li, K (reprint author), CAS, Yunnan Observ, Natl Astron Observ, Kunming 650011, Peoples R China.
产权排序	第一完成单位
英文摘要	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.
学科主题	Astronomy & Astrophysics
WOS标题词	Science & Technology ; Physical Sciences
类目[WOS]	Astronomy & Astrophysics
研究领域[WOS]	Astronomy & Astrophysics
关键词[WOS]	NORTH-SOUTH ASYMMETRY ; NUMBERS R-N ; SOLAR-ACTIVITY ; CYCLE ; COHERENCE ; CATALOG ; PERIOD
收录类别	SCI
原文出处	http://iopscience.iop.org/0004-637X/691/1/75/
语种	英语
WOS记录号	WOS:000263196600007
公开日期	2016-05-03
内容类型	期刊论文
源URL	[http://ir.ynao.ac.cn/handle/114a53/6151]
专题	云南天文台_太阳物理研究组
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
推荐引用方式 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.(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.