VARIATIONS OF SOLAR ROTATION AND SUNSPOT ACTIVITY

	VARIATIONS OF SOLAR ROTATION AND SUNSPOT ACTIVITY
	Li KJ(李可军)1,2; Shi XJ(石祥军)1,3 ; Liang, HF4 ; Zhan, LS5 ; Xie, JL1,3 ; Feng, W 6
刊名	ASTROPHYSICAL JOURNAL
	2011-03-20
卷号	730 期号:1
关键词	Sun: activity Sun: rotation sunspots
ISSN号	0004-637X
通讯作者	Li, KJ (reprint author), CAS, Yunnan Observ, Natl Astron Observ, Kunming 650011, Peoples R China.
产权排序	第一完成单位
英文摘要	The continuous wavelet transformation is used to study the temporal variations of the rotational cycle length of daily sunspot numbers from 1849 January 1 to 2010 February 28, from a global point of view. The rotational cycle length of the Sun is found to have a secular trend, which statistically shows a linear decrease by about 0.47 days during the time interval considered. The empirical mode decomposition analysis of the temporal variations of the rotational cycle length shows an acceleration trend for the surface rotation rate from cycles 11 to 19, but a deceleration trend from the beginning of cycle 20 onward. We cannot determine whether the rotation rate around the maximum times of the Schwable cycles should be faster or slower than that around the minimum times, implying no Schwable cycle in the long-term variations of rotation. The results obtained are compared to those from the literature. It is inferred that the variation of the rotational cycle length may be related to the variation of sunspot activity in the long run.
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]	DIFFERENTIAL ROTATION ; TORSIONAL OSCILLATIONS ; TEMPORAL VARIATIONS ; CONVECTION ZONE ; MOUNT WILSON ; TIME-SERIES ; CYCLE ; VELOCITY ; DECOMPOSITION ; TRANSFORM
收录类别	SCI
原文出处	http://iopscience.iop.org/article/10.1088/0004-637X/730/1/49/meta
语种	英语
WOS记录号	WOS:000288453600048
公开日期	2016-05-03
内容类型	期刊论文
源URL	[http://ir.ynao.ac.cn/handle/114a53/6182]
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.Graduate School of CAS, Beijing 100863, China 4.Department of Physics, Yunnan Normal University, Kunming 650093, China 5.Jingdezhen Ceramic Institute, Jingdezhen 333001, Jiangxi, China 6.Research Center of Analysis and Measurement, Kunming University of Science and Technology, Kunming 650093, China
推荐引用方式 GB/T 7714	Li KJ,Shi XJ,Liang, HF,et al. VARIATIONS OF SOLAR ROTATION AND SUNSPOT ACTIVITY[J]. ASTROPHYSICAL JOURNAL,2011,730(1).
APA	Li KJ,Shi XJ,Liang, HF,Zhan, LS,Xie, JL,&Feng, W.(2011).VARIATIONS OF SOLAR ROTATION AND SUNSPOT ACTIVITY.ASTROPHYSICAL JOURNAL,730(1).
MLA	Li KJ,et al."VARIATIONS OF SOLAR ROTATION AND SUNSPOT ACTIVITY".ASTROPHYSICAL JOURNAL 730.1(2011).