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Periodicity and hemispheric phase relationship in high-latitude solar activity
Li QX(李启秀)1,2; Li, QX (reprint author), CAS, Yunnan Observ, Natl Astron Observ, Kunming 650011, Peoples R China.
Source PublicationSOLAR PHYSICS
2008-05
Volume249Issue:1Pages:135-145
DOI10.1007/s11207-008-9147-2
Contribution Rank第1完成单位
Indexed BySCI
KeywordSun : Activity Sun : Polar Faculae Methods : Data Analysis Methods : Nonlinear Techniques
AbstractThe counts of the monthly averaged polar faculae, from observations of the National Astronomical Observatory of Japan (NAOJ), are examined by using linear and nonlinear approaches to find the periodicity characteristics of the polar faculae in the northern and southern hemispheres and the phase relationship between them. Both the cross-wavelet transform (XWT) and wavelet coherence (WTC) indicate the prominent period with 95% confidence level, namely the Schwabe cycle of about 11 years. The Schwabe cycle is in phase in the two hemispheres. Within the 11-year frequency band, there is a small phase difference during the period of 1966-1975 when the activity of polar faculae in the northern hemisphere slightly leads the one in the southern hemisphere. A cross-recurrence plot analysis and the line of synchronization (LOS) extracted from the cross-recurrence plot show further the phase difference between the two hemispheres. The LOS deviates significantly from the main diagonal during the period of 1965-1970 and LOS > 0, showing that the activity of polar faculae in the northern hemisphere leads in phase, which is in accordance with XWT and WTC analyses. Moreover, asynchronization is highest (about 30 months) during this period.
Language英语
Subject AreaAstronomy & Astrophysics
SubtypeArticle
ISSN0038-0938
URL查看原文
Archive Date2008-06-12
WOS IDWOS:000255115800010
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS KeywordPOLAR FACULAE ; RECURRENCE PLOTS ; WAVELET ANALYSIS ; ACTIVITY CYCLE ; TIME-SERIES ; SUN
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Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/6124
Collection太阳物理研究组
Corresponding AuthorLi, QX (reprint author), CAS, Yunnan Observ, Natl Astron Observ, Kunming 650011, Peoples R China.
Affiliation1.National Astronomical Observatories/Yunnan Observatory, CAS, Kunming, 650011, People’s Republic of China
2.School of Graduates, CAS, Beijing, 100049, People’s Republic of China
First Author AffilicationYunnan Observatories, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Li QX,Li, QX . Periodicity and hemispheric phase relationship in high-latitude solar activity[J]. SOLAR PHYSICS,2008,249(1):135-145.
APA Li QX,&Li, QX .(2008).Periodicity and hemispheric phase relationship in high-latitude solar activity.SOLAR PHYSICS,249(1),135-145.
MLA Li QX,et al."Periodicity and hemispheric phase relationship in high-latitude solar activity".SOLAR PHYSICS 249.1(2008):135-145.
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