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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; Li, KJ (reprint author), Chinese Acad Sci, Yunnan Observ, Natl Astron Observ, Kunming 650011, Peoples R China.
发表期刊ASTRONOMICAL JOURNAL
2014-03
卷号147期号:3页码:1-7
DOI10.1088/0004-6256/147/3/51
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.
项目资助者National Natural Science Foundation of China [11273057, 11221063] ; 973 programs [2012CB957801, 2011CB811406] ; Chinese Academy of Sciences
语种英语
学科领域Astronomy & Astrophysics
文章类型Article
ISSN0004-6256
URL查看原文
归档日期2014-06-23
WOS记录号WOS:000331125600006
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
关键词[WOS]NORTH-SOUTH ASYMMETRY ; SOLAR-ACTIVITY RECONSTRUCTION ; POLAR FACULAE ; FLARE INDEX ; R-S ; CYCLE ; VARIABILITY ; COHERENCE ; CATALOG ; SHAPE
引用统计
文献类型期刊论文
条目标识符http://ir.ynao.ac.cn/handle/114a53/6256
专题太阳物理研究组
通讯作者Li, KJ (reprint author), Chinese Acad Sci, 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.Key Laboratory of Solar Activity, National Astronomical Observatories, CAS, Beijing 100012, China
3.Graduate School of CAS, Beijing 100863, China
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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,&Li, KJ .(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.
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