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

	Long-Term Variations of Solar Differential Rotation and Sunspot Activity: Revisited
	Li KJ(李可军)1,2; Feng, W 3; Shi XJ(石祥军)1,4 ; Xie JL(谢婧岚)1,4 ; Gao PX(高朋鑫)1 ; Liang, HF5
刊名	SOLAR PHYSICS
	2014-03
卷号	289 期号:3 页码:759-768
关键词	Rotation Solar cycle Sunspots observations velocity
ISSN号	0038-0938
通讯作者	Li, KJ (reprint author), Chinese Acad Sci, Yunnan Observ, Natl Astron Observ, Kunming 650011, Peoples R China.
产权排序	第一完成单位
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.
学科主题	Astronomy & Astrophysics
WOS标题词	Science & Technology ; Physical Sciences
类目[WOS]	Astronomy & Astrophysics
研究领域[WOS]	Astronomy & Astrophysics
关键词[WOS]	NORTH-SOUTH ASYMMETRY ; BRIGHTNESS-TEMPERATURE REGIONS ; TORSIONAL OSCILLATIONS ; TEMPORAL VARIATIONS ; MERIDIONAL MOTIONS ; MAGNETIC FEATURES ; CONVECTION ZONE ; ACTIVITY CYCLE ; MOUNT WILSON ; VELOCITY
收录类别	SCI
原文出处	http://link.springer.com/article/10.1007%2Fs11207-013-0369-6
语种	英语
WOS记录号	WOS:000328199700006
内容类型	期刊论文
源URL	[http://ir.ynao.ac.cn/handle/114a53/6257]
专题	云南天文台_太阳物理研究组
作者单位	1.National Astronomical Observatories/Yunnan Observatory, CAS, Kunming, 650011, China 2.Key Laboratory of Solar Activity, National Astronomical Observatories, CAS, Beijing, 100012, China 3.Research Center of Analysis and Measurement, Kunming University of Science and Technology, Kunming, 650093, China 4.Graduate School, CAS, Beijing, 100863, China 5.Department of Physics, Yunnan Normal University, Kunming, 650093, China
推荐引用方式 GB/T 7714	Li KJ,Feng, W,Shi XJ,et al. Long-Term Variations of Solar Differential Rotation and Sunspot Activity: Revisited[J]. SOLAR PHYSICS,2014,289(3):759-768.
APA	Li KJ,Feng, W,Shi XJ,Xie JL,Gao PX,&Liang, HF.(2014).Long-Term Variations of Solar Differential Rotation and Sunspot Activity: Revisited.SOLAR PHYSICS,289(3),759-768.
MLA	Li KJ,et al."Long-Term Variations of Solar Differential Rotation and Sunspot Activity: Revisited".SOLAR PHYSICS 289.3(2014):759-768.