What do the solar activity indices represent?

	What do the solar activity indices represent?
	Li KJ(李可军)1,2; Kong DF(孔德芳)1,3 ; Liang, HF4 ; Feng, W 5
刊名	ASTRONOMISCHE NACHRICHTEN
	2014-05
卷号	335 期号:4 页码:371-377
关键词	Sun: activity Sun: general Sun: radio radiation sunspots
ISSN号	0004-6337
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	Sunspot number, sunspot area, and radio flux at 10.7 cm are the indices which are most frequently used to describe the long-term solar activity. The data of the daily solar full-disk magnetograms measured at Mount Wilson Observatory from 19 January 1970 to 31 December 2012 are utilized together with the daily observations of the three indices to probe the relationship of the full-disk magnetic activity respectively with the indices. Cross correlation analyses of the daily magnetic field measurements at Mount Wilson observatory are taken with the daily observations of the three indices, and the statistical significance of the difference of the obtained correlation coefficients is investigated. The following results are obtained: (1) The sunspot number should be preferred to represent/reflect the full-disk magnetic activity of the Sun to which the weak magnetic fields (outside of sunspots) mainly contribute, the sunspot area should be recommended to represent the strong magnetic activity of the Sun (in sunspots), and the 10.7 cm radio flux should be preferred to represent the full-disk magnetic activity of the Sun (both the weak and strong magnetic fields) to which the weak magnetic fields mainly contribute. (2) On the other hand, the most recommendable index that could be used to represent/reflect the weak magnetic activity is the 10.7 cm radio flux, the most recommendable index that could be used to represent the strong magnetic activity is the sunspot area, and the most recommendable index that could be used to represent the full-disk magnetic activity of the Sun is the 10.7cm radio flux. Additionally, the cycle characteristics of the magnetic field strengths on the solar disk are given. ((c) 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim)
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]	GROUP SUNSPOT NUMBERS ; POLAR FACULAE ; MOUNT-WILSON ; ACTIVITY RECONSTRUCTION ; CYCLE ; ROTATION
收录类别	SCI
原文出处	http://onlinelibrary.wiley.com/doi/10.1002/asna.201312016/abstract
语种	英语
WOS记录号	WOS:000335665600005
内容类型	期刊论文
源URL	[http://ir.ynao.ac.cn/handle/114a53/6252]
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.University of Chinese Academy of Sciences, Beijing 100863, China 4.Department of Physics, Yunnan Normal University, Kunming 650093, China 5.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,Kong DF,Liang, HF,et al. What do the solar activity indices represent?[J]. ASTRONOMISCHE NACHRICHTEN,2014,335(4):371-377.
APA	Li KJ,Kong DF,Liang, HF,&Feng, W.(2014).What do the solar activity indices represent?.ASTRONOMISCHE NACHRICHTEN,335(4),371-377.
MLA	Li KJ,et al."What do the solar activity indices represent?".ASTRONOMISCHE NACHRICHTEN 335.4(2014):371-377.