Long-Term Variations of Solar Differential Rotation and Sunspot Activity: Revisited

	Long-Term Variations of Solar Differential Rotation and Sunspot Activity: Revisited
	Li, K. J.1,2; Feng, W.3; Shi, X. J.1,4; Xie, J. L.1,4; Gao, P. X.1; Liang, H. F.5
刊名	SOLAR PHYSICS
	2014-03-01
卷号	289 期号:3 页码:759-768
关键词	Rotation Solar cycle, observations Sunspots, velocity
英文摘要	Long-term variations of solar differential rotation and sunspot activity are investigated through re-analyzing the data on parameters of the differential-rotation law obtained by Makarov, Tlatov, and Callebaut (Solar Phys. 170, 373, 1997), Javaraiah, Bertello, and Ulrich (Astrophys. J. 626, 579, 2005a; Solar Phys. 232, 25, 2005b), and Javaraiah et al. (Solar Phys. 257, 61, 2009). Our results indicate that the solar-surface-rotation rate at the Equator (indicated by the A-parameter of the standard solar-rotation law) shows a secular decrease since Cycle 12 onwards, given by about 1 - 1.5 x 10(-3) (deg day(-1) year(-1)). The B-parameter of the standard differential-rotation law seems to also show a secular decrease since Cycle 12 onwards, but of weak statistical significance. The rotation rate averaged over latitudes 0 degrees-40 degrees does not show a secular trend of statistical significance. Moreover, the average sunspot area shows a secular increase of statistical significance since Cycle 12 onwards, while a negative correlation is found between the level of sunspot activity (indicated by the average sunspot area) and the solar equatorial rotation on long-term scales.
收录类别	SCI
语种	英语
WOS记录号	WOS:000328199700006
内容类型	期刊论文
源URL	[http://ir.bao.ac.cn/handle/114a11/6479]
专题	国家天文台_星系宇宙学研究部
作者单位	1.Chinese Acad Sci, Yunnan Observ, Natl Astron Observ, Kunming 650011, Peoples R China 2.Chinese Acad Sci, Natl Astron Observ, Key Lab Solar Act, Beijing 100012, Peoples R China 3.Kunming Univ Sci & Technol, Res Ctr Anal & Measurement, Kunming 650093, Peoples R China 4.Chinese Acad Sci, Grad Sch, Beijing 100863, Peoples R China 5.Yunnan Normal Univ, Dept Phys, Kunming 650093, Peoples R China
推荐引用方式 GB/T 7714	Li, K. J.,Feng, W.,Shi, X. J.,et al. Long-Term Variations of Solar Differential Rotation and Sunspot Activity: Revisited[J]. SOLAR PHYSICS,2014,289(3):759-768.
APA	Li, K. J.,Feng, W.,Shi, X. J.,Xie, J. L.,Gao, P. X.,&Liang, H. F..(2014).Long-Term Variations of Solar Differential Rotation and Sunspot Activity: Revisited.SOLAR PHYSICS,289(3),759-768.
MLA	Li, K. J.,et al."Long-Term Variations of Solar Differential Rotation and Sunspot Activity: Revisited".SOLAR PHYSICS 289.3(2014):759-768.