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Sunspot unit area: A new parameter to describe long-term solar variability
Li KJ(李可军)1,2; Qiu, J2; Su TW(苏同卫)1; Gao PX(高朋鑫)1; Li, KJ (reprint author), Chinese Acad Sci, Natl Astron Observ, Yunnan Observ, POB 110, Kunming 650011, Peoples R China.
发表期刊ASTROPHYSICAL JOURNAL
2005-03-01
卷号621期号:1页码:L81-L84
DOI10.1086/428941
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In this Letter we introduce a new parameter, the sunspot unit area (SUA), which describes the daily average size of sunspots produced by the dynamo in a solar cycle. The monthly average of the SUA is studied to show its variation during the solar cycle and is compared with the two commonly used parameters, sunspot numbers and sunspot areas. Our results show that (1) the new SUA parameter waxes and wanes during sunspot cycles in the same way as the other two parameters, but with a relatively small magnitude of fluctuations, (2) the Waldmeier effect and the Gnevyshev-Ohl rule, which appear in the variations of both sunspot numbers and sunspot areas, are not shown in the variations of SUA during solar cycles, and (3) the most pronounced period of SUA variation is about 10.13 yr, which is statistically significant at any time of the considered time span.
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2005-03-05
WOS记录号WOS:000227406400021
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
关键词[WOS]CYCLE ; IRRADIANCE
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被引频次:20[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ynao.ac.cn/handle/114a53/6077
专题太阳物理研究组
通讯作者Li, KJ (reprint author), Chinese Acad Sci, Natl Astron Observ, Yunnan Observ, POB 110, Kunming 650011, Peoples R China.
作者单位1.National Astronomical Observatories/Yunnan Observatory, Chinese Academy of Sciences, P.O. Box 110, Kunming 650011, China
2.Big Bear Solar Observatory, New Jersey Institute of Technology, 40386 North Lake Shore Lane, Big Bear City, CA 92314-9672
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Li KJ,Qiu, J,Su TW,et al. Sunspot unit area: A new parameter to describe long-term solar variability[J]. ASTROPHYSICAL JOURNAL,2005,621(1):L81-L84.
APA Li KJ,Qiu, J,Su TW,Gao PX,&Li, KJ .(2005).Sunspot unit area: A new parameter to describe long-term solar variability.ASTROPHYSICAL JOURNAL,621(1),L81-L84.
MLA Li KJ,et al."Sunspot unit area: A new parameter to describe long-term solar variability".ASTROPHYSICAL JOURNAL 621.1(2005):L81-L84.
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