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Synchronization of Sunspot Numbers and Sunspot Areas
Li KJ(李可军)1; Gao PX(高朋鑫)1,2; Zhan, LS3; Li, KJ (reprint author), Chinese Acad Sci, Yunnan Observ, Natl Astron Observ, Kunming 650011, Peoples R China.
Source PublicationSOLAR PHYSICS
2009-04
Volume255Issue:2Pages:289-300
DOI10.1007/s11207-009-9328-7
Contribution Rank第1完成单位
Indexed BySCI
KeywordSunspots Statistics Solar Cycle Observations
AbstractSunspot activity is usually described by either sunspot numbers or sunspot areas. The smoothed monthly mean sunspot numbers (SNs) and the smoothed monthly mean areas (SAs) in the time interval from November 1874 to September 2007 are used to analyze their phase synchronization. Both the linear method (fast Fourier transform) and some nonlinear approaches (continuous wavelet transform, cross-wavelet transform, wavelet coherence, cross-recurrence plot, and line of synchronization) are utilized to show the phase relation between the two series. There is a high level of phase synchronization between SNs and SAs, but the phase synchronization is detected only in their low-frequency components, corresponding to time scales of about 7 to 12 years. Their high-frequency components show a noisy behavior with strong phase mixing. Coherent phase variables should exist only for a frequency band with periodicities around the dominating 11-year cycle for SNs and SAs. There are some small phase differences between them. SNs lag SAs during most of the considered time interval, and they are in general more asynchronous around the minimum and maximum times of a cycle than at the ascending and descending phases.
Funding OrganizationNational Natural Science Foundation of China [40636031, 10583032] ; 973 Project [2006CB806300] ; Chinese Academy of Sciences
Language英语
Subject AreaAstronomy & Astrophysics
SubtypeArticle
ISSN0038-0938
URL查看原文
Archive Date2009-04-07
WOS IDWOS:000264536800008
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS KeywordRECURRENCE PLOTS ; SOLAR-CYCLE ; WAVELET ANALYSIS ; TIME-SERIES ; LONG-TERM ; COHERENCE ; LATITUDE ; CLIMATE ; LENGTH
Citation statistics
Cited Times:18[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/6144
Collection太阳物理研究组
Corresponding AuthorLi, KJ (reprint author), Chinese Acad Sci, Yunnan Observ, Natl Astron Observ, Kunming 650011, Peoples R China.
Affiliation1.National Astronomical Observatories/Yunnan Observatory, CAS, Kunming, 650011, China
2.Graduate School of CAS, Beijing, 100049, China
3.Jingdezhen Ceramic Institute, Jingdezhan, 333001, Jiangxi, China
First Author AffilicationYunnan Observatories, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Li KJ,Gao PX,Zhan, LS,et al. Synchronization of Sunspot Numbers and Sunspot Areas[J]. SOLAR PHYSICS,2009,255(2):289-300.
APA Li KJ,Gao PX,Zhan, LS,&Li, KJ .(2009).Synchronization of Sunspot Numbers and Sunspot Areas.SOLAR PHYSICS,255(2),289-300.
MLA Li KJ,et al."Synchronization of Sunspot Numbers and Sunspot Areas".SOLAR PHYSICS 255.2(2009):289-300.
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