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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.
发表期刊SOLAR PHYSICS
2008-05
卷号249期号:1页码:135-145
DOI10.1007/s11207-008-9147-2
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收录类别SCI
关键词Sun : Activity Sun : Polar Faculae Methods : Data Analysis Methods : Nonlinear Techniques
摘要The 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.
语种英语
学科领域Astronomy & Astrophysics
文章类型Article
ISSN0038-0938
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归档日期2008-06-12
WOS记录号WOS:000255115800010
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
关键词[WOS]POLAR FACULAE ; RECURRENCE PLOTS ; WAVELET ANALYSIS ; ACTIVITY CYCLE ; TIME-SERIES ; SUN
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文献类型期刊论文
条目标识符http://ir.ynao.ac.cn/handle/114a53/6124
专题太阳物理研究组
通讯作者Li, QX (reprint author), CAS, Yunnan Observ, Natl Astron Observ, Kunming 650011, Peoples R China.
作者单位1.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
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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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