Activity Complexes and a Prominent Poleward Surge during Solar Cycle 24
文献类型：期刊论文
| 作者 | Wang,Zi-Fan1,5; Jiang,Jie2,4; Zhang,Jie3; Wang,Jing-Xiu1,5 |
| 刊名 | The Astrophysical Journal
 |
| 出版日期 | 2020-11-01 |
| 卷号 | 904期号:1 |
| 关键词 | Solar magnetic fields Solar cycle Solar active regions |
| ISSN号 | 0004-637X |
| DOI | 10.3847/1538-4357/abbc1e |
| 英文摘要 | Abstract Long-lasting activity complexes (ACs), characterized as a series of closely located, continuously emerging solar active regions (ARs), are considered generating prominent poleward surges from observations. The surges lead to significant variations of the polar field, which are important for the modulation of solar cycles. We aim to study a prominent poleward surge during solar cycle 24 on the southern hemisphere, and analyze its originating ACs and the effect on the polar field evolution. We automatically identify and characterize ARs based on synoptic magnetograms from the Solar Dynamics Observatory. We assimilate these ARs with realistic magnetic configuration into a surface flux transport model, and simulate the creation and migration of the surge. Our simulations well reproduce the characteristics of the surge and show that the prominent surge is mainly caused by the ARs belonging to two ACs during Carrington rotations 2145–2159 (2013 December–2015 January). The surge has a strong influence on the polar field evolution of the southern hemisphere during the latter half of cycle 24. Without the about one-year-long flux emergence in the form of ACs, the polar field around the cycle minimum would have remained at a low level and even reversed to the polarity at cycle 23 minimum. Our study also shows that the long-lived unipolar regions due to the decay of the earlier emerging ARs cause an intrinsic difficulty of automatically identifying and precisely quantifying later emerging ARs in ACs. |
| 语种 | 英语 |
| WOS记录号 | IOP:0004-637X-904-1-ABBC1E |
| 出版者 | The American Astronomical Society |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/62379]  |
| 专题 | 中国科学院国家天文台 |
| 通讯作者 | Jiang,Jie |
| 作者单位 | 1.Key Laboratory of Solar Activity, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100101, People’s Republic of China 2.School of Space and Environment, Beihang University, Beijing, People’s Republic of China; jiejiang@buaa.edu.cn 3.Department of Physics and Astronomy, George Mason University, Fairfax, VA 22030, USA 4.Key Laboratory of Space Environment Monitoring and Information Processing of MIIT, Beijing, People’s Republic of China 5.School of Astronomy and Space Science, University of Chinese Academy of Sciences, Beijing, People’s Republic of China |
| 推荐引用方式 GB/T 7714 | Wang,Zi-Fan,Jiang,Jie,Zhang,Jie,et al. Activity Complexes and a Prominent Poleward Surge during Solar Cycle 24[J]. The Astrophysical Journal,2020,904(1). |
| APA | Wang,Zi-Fan,Jiang,Jie,Zhang,Jie,&Wang,Jing-Xiu.(2020).Activity Complexes and a Prominent Poleward Surge during Solar Cycle 24.The Astrophysical Journal,904(1). |
| MLA | Wang,Zi-Fan,et al."Activity Complexes and a Prominent Poleward Surge during Solar Cycle 24".The Astrophysical Journal 904.1(2020). |
入库方式： OAI收割
来源：国家天文台
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。