Investigation of Sunspot Area Varying with Sunspot Number

	Investigation of Sunspot Area Varying with Sunspot Number
	Li, K. J.1,2,3 ; Li, F. Y.1,4; Zhang, J.1,4; Feng, W.5,6
刊名	SOLAR PHYSICS
	2016-11-01
卷号	291 期号:9-10 页码:2917-2930
关键词	Sunspots, statistics Solar cycle, observations
英文摘要	The statistical relationship between sunspot area (SA) and sunspot number (SN) is investigated through analysis of their daily observation records from May 1874 to April 2015. For a total of 1607 days, representing 3 % of the total interval considered, either SA or SN had a value of zero while the other parameter did not. These occurrences most likely reflect the report of short-lived spots by a single observatory and subsequent averaging of zero values over multiple stations. The main results obtained are as follows: i) The number of spotless days around the minimum of a solar cycle is statistically negatively correlated with the maximum strength of solar activity of that cycle. ii) The probability distribution of SA generally decreases monotonically with SA, but the distribution of SN generally increases first, then it decreases as a whole. The different probability distribution of SA and SN should strengthen their non-linear relation, and the correction factor [k] in the definition of SN may be one of the factors that cause the non-linearity. iii) The non-linear relation of SA and SN indeed exists statistically, and it is clearer during the maximum epoch of a solar cycle.
WOS标题词	Science & Technology ; Physical Sciences
类目[WOS]	Astronomy & Astrophysics
研究领域[WOS]	Astronomy & Astrophysics
关键词[WOS]	SOLAR-CYCLE ; UNIT AREA
收录类别	SCI
语种	英语
WOS记录号	WOS:000388842600021
内容类型	期刊论文
源URL	[http://ir.bao.ac.cn/handle/114a11/6826]
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, Kunming 650011, Peoples R China 2.Chinese Acad Sci, State Key Lab Space Weather, Beijing 100190, Peoples R China 3.Chinese Acad Sci, Natl Astron Observ, Key Lab Solar Act, Beijing 100012, Peoples R China 4.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 5.Kunming Univ Sci & Technol, Res Ctr Anal & Measurement, Kunming 650093, Peoples R China 6.Nanjing Univ, Key Lab Modern Astron & Astrophys, Minist Educ, Nanjing 210093, Jiangsu, Peoples R China
推荐引用方式 GB/T 7714	Li, K. J.,Li, F. Y.,Zhang, J.,et al. Investigation of Sunspot Area Varying with Sunspot Number[J]. SOLAR PHYSICS,2016,291(9-10):2917-2930.
APA	Li, K. J.,Li, F. Y.,Zhang, J.,&Feng, W..(2016).Investigation of Sunspot Area Varying with Sunspot Number.SOLAR PHYSICS,291(9-10),2917-2930.
MLA	Li, K. J.,et al."Investigation of Sunspot Area Varying with Sunspot Number".SOLAR PHYSICS 291.9-10(2016):2917-2930.