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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.
Source PublicationASTROPHYSICAL JOURNAL
2005-03-01
Volume621Issue:1Pages:L81-L84
DOI10.1086/428941
Contribution Rank第1完成单位
Indexed BySCI
KeywordSun : Activity Sun : General Sunspots
AbstractIn 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.
Language英语
Subject AreaAstronomy & Astrophysics
SubtypeArticle
ISSN0004-637X
URL查看原文
Archive Date2005-03-05
WOS IDWOS:000227406400021
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS KeywordCYCLE ; IRRADIANCE
Citation statistics
Cited Times:21[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/6077
Collection太阳物理研究组
Corresponding AuthorLi, KJ (reprint author), Chinese Acad Sci, Natl Astron Observ, Yunnan Observ, POB 110, Kunming 650011, Peoples R China.
Affiliation1.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
First Author AffilicationYunnan Observatories, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
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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