Hemispheric Asymmetry of Relative Sunspot Numbers during Solar Cycles 17-25
文献类型：期刊论文
| 作者 | Wang, Wenhua3; Deng, Linhua3; Jiang, Zuo3; Li, Jinlei1,2,4; Zhao, Xinhua1,5; Xu, Tingting3; Wan, Miao3; Cao, Jie3; Xiang NB(向南彬)6; Tan, Xuewen3 |
| 刊名 | ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES
 |
| 出版日期 | 2025-09-01 |
| 卷号 | 280期号:1 |
| ISSN号 | 0067-0049 |
| DOI | 10.3847/1538-4365/adf105 |
| 产权排序 | 第6完成单位 |
| 文献子类 | Article |
| 英文摘要 | The hemispheric asymmetry of solar activity provides important diagnostics of solar dynamo processes. In this study, we present a phase-resolved statistical analysis of hemispheric sunspot number asymmetry over solar cycles 17-25 (1939-2024), using monthly mean data from the National Astronomical Observatory of Japan. By combining normalized asymmetry indices, cumulative deviation tracking, and year-by-year significance testing, we identify four key results: (1) the northern hemisphere consistently dominates during the ascending phases of most cycles, suggesting a preferential emergence of magnetic flux at the northern hemisphere; (2) the hemispheric asymmetry significantly diminishes during polarity reversal periods, indicating a balancing effect of global magnetic reconfiguration; (3) solar cycles 23 and 25 exhibit remarkably similar asymmetry patterns, implying solar cycle 25 is likely to be similar to solar cycle 23; and (4) the strength of hemispheric dominance correlates with the overall solar activity level, with stronger asymmetries observed during high-activity phases and weaker signals near solar minima. These findings offer new observational constraints for modeling hemispheric solar dynamics and establish a reproducible, scalable framework for future investigations of long-term solar magnetic asymmetries. |
| 学科主题 | 天文学 ; 太阳与太阳系 |
| URL标识 | 查看原文 |
| 出版地 | TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND |
| WOS关键词 | NORTH-SOUTH ASYMMETRY ; RIEGER-TYPE PERIODICITY ; CORONAL MASS EJECTIONS ; MEAN-FIELD ALPHA ; FLARE INDEX ; DYNAMO MODELS ; MERIDIONAL CIRCULATION ; GEOMAGNETIC-ACTIVITY ; MAUNDER MINIMUM ; ACTIVE REGIONS |
| 资助项目 | National Nature Science Foundation of China[12463009] |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:001555827400001 |
| 出版者 | IOP Publishing Ltd |
| 资助机构 | National Nature Science Foundation of China[12463009] |
| 版本 | 出版稿 |
| 源URL | [http://ir.ynao.ac.cn/handle/114a53/28513]  |
| 专题 | 云南天文台_抚仙湖太阳观测站 |
| 通讯作者 | Deng, Linhua |
| 作者单位 | 1.State Key Laboratory of Solar Activity and Space Weather, National Space Science Center, Chinese Academy of Sciences, Beijing 100190, People’s Republic of China; 2.School of Geophysics and Information Technology, China University of Geosciences, Beijing 100083, People’s Republic of China; 3.School of Mathematics and Computer Science, Yunnan Minzu University, Kunming 650504, People’s Republic of China; linhua.deng@ymu.edu.cn; 4.Key Laboratory of Solar Activity and Space Weather, National Space Science Center, Chinese Academy of Sciences, Beijing 100190, People’s Republic of China; 5.Radio Science and Technology Center (π Center), Chengdu, Sichuan, 610041, People’s Republic of China; 6.Yunnan Observatories, Chinese Academy of Sciences, Kunming 650216, People’s Republic of China |
| 推荐引用方式 GB/T 7714 | Wang, Wenhua,Deng, Linhua,Jiang, Zuo,et al. Hemispheric Asymmetry of Relative Sunspot Numbers during Solar Cycles 17-25[J]. ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES,2025,280(1). |
| APA | Wang, Wenhua.,Deng, Linhua.,Jiang, Zuo.,Li, Jinlei.,Zhao, Xinhua.,...&Zhou, Weihong.(2025).Hemispheric Asymmetry of Relative Sunspot Numbers during Solar Cycles 17-25.ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES,280(1). |
| MLA | Wang, Wenhua,et al."Hemispheric Asymmetry of Relative Sunspot Numbers during Solar Cycles 17-25".ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES 280.1(2025). |
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来源：云南天文台
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