The Present Special Solar Cycle 24: Casting a Shadow over Periodicity of the North-South Hemispherical Asymmetry
文献类型：期刊论文
| 作者 | Li, F. Y.1,2,3,4; Xiang, N. B.1,2,3; Xie, J. L.1,2,3; Xu, J. C.1,2,3 |
| 刊名 | ASTROPHYSICAL JOURNAL
 |
| 出版日期 | 2019-03-10 |
| 卷号 | 873期号:2页码:6 |
| 关键词 | Sun: activity Sun: general sunspots |
| ISSN号 | 0004-637X |
| DOI | 10.3847/1538-4357/ab06bf |
| 英文摘要 | The N-S asymmetry (the north-south hemispheric asymmetry) of sunspot areas for each of the cycles 7-24 have been investigated, and a trend of a long-term characteristic timescale of about eight cycles is inferred, which is confirmed again by studying the fitted lines of the yearly values of the N-S asymmetry of sunspot numbers and sunspot group numbers at solar cycle 24. Then, a periodic behavior of about 12 solar cycles is found in the cumulative counts of yearly sunspot areas for each of the cycles 7-24. Nevertheless, the cumulative counts of sunspot numbers and sunspot group numbers for cycle 24 have different behaviors. Moreover, the dominant hemispheres for cycles 7-23 show a trend of a long-term characteristic timescale of about 12 cycles. However, we cannot determine the dominant hemisphere of cycle 24, as these three parameters give different results for the dominant hemisphere. Cycle 24 is a particular solar activity cycle, as sunspot areas suggest a long characteristic timescale of about 12-cycle length, while sunspot numbers and sunspot group numbers support an eight-cycle period of the N-S asymmetry. |
| 资助项目 | National Natural Science Foundation of China[11573065] ; National Natural Science Foundation of China[11633008] ; National Natural Science Foundation of China[11703085] ; National Natural Science Foundation of China[11603069] ; National Natural Science Foundation of China[11803086] |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000461205000001 |
| 出版者 | IOP PUBLISHING LTD |
| 资助机构 | National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/25312]  |
| 专题 | 中国科学院国家天文台 |
| 通讯作者 | Li, F. Y. |
| 作者单位 | 1.Chinese Acad Sci, Yunnan Observ, Kunming 650011, Yunnan, Peoples R China 2.Chinese Acad Sci, State Key Lab Space Weather, Beijing 100190, Peoples R China 3.Chinese Acad Sci, Key Lab Solar Act, Natl Astron Observ, Beijing 100012, Peoples R China 4.Univ Chinese Acad Sci, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Li, F. Y.,Xiang, N. B.,Xie, J. L.,et al. The Present Special Solar Cycle 24: Casting a Shadow over Periodicity of the North-South Hemispherical Asymmetry[J]. ASTROPHYSICAL JOURNAL,2019,873(2):6. |
| APA | Li, F. Y.,Xiang, N. B.,Xie, J. L.,&Xu, J. C..(2019).The Present Special Solar Cycle 24: Casting a Shadow over Periodicity of the North-South Hemispherical Asymmetry.ASTROPHYSICAL JOURNAL,873(2),6. |
| MLA | Li, F. Y.,et al."The Present Special Solar Cycle 24: Casting a Shadow over Periodicity of the North-South Hemispherical Asymmetry".ASTROPHYSICAL JOURNAL 873.2(2019):6. |
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来源：国家天文台
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