HEMISPHERIC SUNSPOT UNIT AREA: COMPARISON WITH HEMISPHERIC SUNSPOT NUMBER AND SUNSPOT AREA

	HEMISPHERIC SUNSPOT UNIT AREA: COMPARISON WITH HEMISPHERIC SUNSPOT NUMBER AND SUNSPOT AREA
	Li KJ(李可军)1,2; Xiang NB(向南彬)1,3 ; Qu ZN(屈智宁)1,3 ; Xie JL(谢婧岚)1,3
刊名	ASTRONOMICAL JOURNAL
	2014-03
卷号	147 期号:3 页码:1-7
关键词	Sun: activity Sun: general sunspots
ISSN号	0004-6256
通讯作者	Li, KJ (reprint author), Chinese Acad Sci, Yunnan Observ, Natl Astron Observ, Kunming 650011, Peoples R China.
产权排序	第一完成单位
英文摘要	The monthly mean northern and southern hemispheric sunspot numbers (SNs) and sunspot areas (SAs) in the time interval of 1945 January to 2012 December are utilized to construct the monthly northern and southern hemispheric sunspot unit areas (SUAs), which are defined as the ratio of hemispheric SA to SN. Hemispheric SUAs are usually found to rise at the beginning and to fall at the ending time of a solar cycle more rapidly, forming a more irregular cycle profile than hemispheric SNs and SAs, although it also presents Schwabe-cycle-like hemispheric SNs and SAs. Sunspot activity (SN, SA, and SUA) is found asynchronously and is asymmetrically distributed in the northern and southern hemispheres, and hemispheric SNs, SAs, and SUAs are not in phase in the two hemispheres. The similarity of hemispheric SNs and SAs is found to be much more obvious than that of hemispheric SUAs and SNs (or SAs), and also for their north-south asymmetry. A notable feature is found for the behavior of the SUA around the minimum time of cycle 24: the SUA rapidly decreases from the cycle maximum value to the cycle minimum value of sunspot cycles 19-24 within just 22 months.
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 ; SOLAR-ACTIVITY RECONSTRUCTION ; POLAR FACULAE ; FLARE INDEX ; R-S ; CYCLE ; VARIABILITY ; COHERENCE ; CATALOG ; SHAPE
收录类别	SCI
原文出处	http://iopscience.iop.org/article/10.1088/0004-6256/147/3/51/meta
语种	英语
WOS记录号	WOS:000331125600006
内容类型	期刊论文
源URL	[http://ir.ynao.ac.cn/handle/114a53/6256]
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.Key Laboratory of Solar Activity, National Astronomical Observatories, CAS, Beijing 100012, China 3.Graduate School of CAS, Beijing 100863, China
推荐引用方式 GB/T 7714	Li KJ,Xiang NB,Qu ZN,et al. HEMISPHERIC SUNSPOT UNIT AREA: COMPARISON WITH HEMISPHERIC SUNSPOT NUMBER AND SUNSPOT AREA[J]. ASTRONOMICAL JOURNAL,2014,147(3):1-7.
APA	Li KJ,Xiang NB,Qu ZN,&Xie JL.(2014).HEMISPHERIC SUNSPOT UNIT AREA: COMPARISON WITH HEMISPHERIC SUNSPOT NUMBER AND SUNSPOT AREA.ASTRONOMICAL JOURNAL,147(3),1-7.
MLA	Li KJ,et al."HEMISPHERIC SUNSPOT UNIT AREA: COMPARISON WITH HEMISPHERIC SUNSPOT NUMBER AND SUNSPOT AREA".ASTRONOMICAL JOURNAL 147.3(2014):1-7.