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Variations and Regularities in the Hemispheric Distributions in Sunspot Groups of Various Classes
Gao PX(高朋鑫)1,2,3
Source PublicationSOLAR PHYSICS
2018-05-01
Volume293Issue:5
DOI10.1007/s11207-018-1298-1
Contribution Rank第1完成单位
Indexed BySCI
KeywordMethods: Data Analysis Sun: Activity Sunspots
Abstract

The present study investigates the variations and regularities in the distributions in sunspot groups (SGs) of various classes in the northern and southern hemispheres from Solar Cycles (SCs) 12 to 23. Here, we use the separation scheme that was introduced by Gao, Li, and Li (Solar Phys. 292, 124, 2017), which is based on A/U (A is the corrected area of the SG, and U is the corrected umbral area of the SG), in order to separate SGs into simple SGs (A/U <= 4.5) and complex SGs (A/U > 6.2). The time series of Greenwich photoheliographic results from 1875 to 1976 (corresponding to complete SCs 12 - 20) and Debrecen photoheliographic data during the period 1974 - 2015 (corresponding to complete SCs 21 - 23) are used to show the distributions of simple and complex SGs in the northern and southern hemispheres. The main results we obtain are reported as follows: i) the larger of the maximum annual simple SG numbers in the two hemispheres and the larger of the maximum annual complex SG numbers in the two hemispheres occur in different hemispheres during SCs 12, 14, 18, and 19; ii) the relative changing trends of two curves - cumulative SG numbers in the northern and southern hemispheres - for simple SGs are different from those for complex SGs during SCs 12, 14, 18, and 21; and iii) there are discrepancies between the dominant hemispheres of simple and complex SGs for SCs 12, 14, 18, and 21.

Funding ProjectNational Natural Science Foundation of China[11673061] ; National Natural Science Foundation of China[11633008] ; Foundation of Key Laboratory of Solar Activity of National Astronomical Observatories of Chinese Academy of Sciences[KLSA201706] ; Chinese Academy of Sciences
Funding OrganizationNational Natural Science Foundation of China[11673061, 11633008] ; Foundation of Key Laboratory of Solar Activity of National Astronomical Observatories of Chinese Academy of Sciences[KLSA201706] ; Chinese Academy of Sciences
Language英语
Subject Area天文学 ; 太阳与太阳系 ; 太阳物理学
MOST Discipline Catalogue理学 ; 理学::天文学
SubtypeArticle
PublisherSPRINGER
Publication PlaceVAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS
ISSN0038-0938
URL查看原文
WOS IDWOS:000431959700008
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS KeywordNORTH-SOUTH ASYMMETRY ; NUMBERS R-N ; SOLAR-ACTIVITY ; STATISTICAL-ANALYSIS ; ROTATION RATE ; FLARE INDEX ; CYCLE ; BEHAVIOR ; DYNAMO ; MINIMUM
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/12397
Collection太阳物理研究组
Corresponding AuthorGao PX(高朋鑫)
Affiliation1.Yunnan Observatories, Chinese Academy of Sciences, Kunming 650216, China
2.Key Laboratory of Solar Activity, National Astronomical Observatories, Chinese Academy of
3.Center for Astronomical Mega-Science, Chinese Academy of Sciences, Beijing 100012, China
First Author AffilicationYunnan Observatories, Chinese Academy of Sciences
Corresponding Author AffilicationYunnan Observatories, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Gao PX. Variations and Regularities in the Hemispheric Distributions in Sunspot Groups of Various Classes[J]. SOLAR PHYSICS,2018,293(5).
APA Gao PX.(2018).Variations and Regularities in the Hemispheric Distributions in Sunspot Groups of Various Classes.SOLAR PHYSICS,293(5).
MLA Gao PX."Variations and Regularities in the Hemispheric Distributions in Sunspot Groups of Various Classes".SOLAR PHYSICS 293.5(2018).
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