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Temporal variation of hemispheric solar rotation
Xie JL(谢婧岚)1,2; Shi XJ(石祥军)1,2; Xu JC(徐景晨)1,2; Xie, JL (reprint author), Chinese Acad Sci, Natl Astron Observ, Yunnan Observ, Kunming 650011, Peoples R China.
发表期刊RESEARCH IN ASTRONOMY AND ASTROPHYSICS
2012-02
卷号12期号:2页码:187-200
DOI10.1088/1674-4527/12/2/007
产权排序第1完成单位
收录类别SCI
关键词Sun: Activity Sun: Rotation Sun: Sunspot
摘要The daily sunspot numbers of the whole disk as well as the northern and southern hemispheres from 1945 January 1 to 2010 December 31 are used to investigate the temporal variation of rotational cycle length through the continuous wavelet transformation analysis method. Auto-correlation function analysis of daily hemispheric sunspot numbers shows that the southern hemisphere rotates faster than the northern hemisphere. The results obtained from the wavelet transformation analysis are that no direct relationship exists between the variation trend of the rotational cycle length and the solar activity in the two hemispheres and that the rotational cycle length of both hemispheres has no significant period appearing at 11 yr, but has a significant period of about 7.6 yr. Analysis concerning the solar cycle dependence of the rotational cycle length shows that acceleration seems to appear before the minimum time of solar activity in the whole disk and the northern hemisphere, respectively. Furthermore, the cross-correlation study indicates that the rotational cycle length of the two hemispheres has different phases, and that the rotational cycle length of the whole disk as well as the northern and southern hemispheres, also has phase shifts with corresponding solar activity. In addition, the temporal variation of the north-south (NS) asymmetry of the rotational cycle length is also studied. This displays the same variation trend as the N-S asymmetry of solar activity in a solar cycle, as well as in the considered time interval, and has two significant periods of 7.7 and 17.5 yr. Moreover, the rotational cycle length and the N-S asymmetry of solar activity are highly correlated. It is inferred that the northern hemisphere should rotate faster at the beginning of solar cycle 24.
项目资助者National Natural Science Foundation of China [10873032, 10921303, 11073010, 40636031] ; National Basic Research Program of China (973 programs) [2011CB811406, 2012CB957801]
语种英语
学科领域Astronomy & Astrophysics
文章类型Article
ISSN1674-4527
URL查看原文
归档日期2012-07-25
WOS记录号WOS:000300762600007
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
关键词[WOS]NORTH-SOUTH ASYMMETRY ; N-S ASYMMETRY ; NUMBERS R-N ; DIFFERENTIAL ROTATION ; SUNSPOT NUMBERS ; WAVELET ANALYSIS ; ACTIVITY CYCLES ; PERIODICITIES ; SUN ; VELOCITY
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被引频次:25[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/114a53/6211
专题太阳物理研究组
通讯作者Xie, JL (reprint author), Chinese Acad Sci, Natl Astron Observ, Yunnan Observ, Kunming 650011, Peoples R China.
作者单位1.National Astronomical Observatories/ Yunnan Observatory, Chinese Academy of Sciences, Kunming 650011, China
2.Graduate University of Chinese Academy of Sciences, Beijing 100049, China
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Xie JL,Shi XJ,Xu JC,et al. Temporal variation of hemispheric solar rotation[J]. RESEARCH IN ASTRONOMY AND ASTROPHYSICS,2012,12(2):187-200.
APA Xie JL,Shi XJ,Xu JC,&Xie, JL .(2012).Temporal variation of hemispheric solar rotation.RESEARCH IN ASTRONOMY AND ASTROPHYSICS,12(2),187-200.
MLA Xie JL,et al."Temporal variation of hemispheric solar rotation".RESEARCH IN ASTRONOMY AND ASTROPHYSICS 12.2(2012):187-200.
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