The North–South Asymmetry of Sunspot Relative Numbers Based on Complex Network Technique
Solar magnetic activity exhibits a complex nonlinear behavior, but its dynamic process has not been fully understood. As the complex network technique can better capture the dynamics of nonlinear system, the visibility graphs (VG), the horizontal visibility graphs (HVG), and the limited penetrable v...
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MDPI AG
2021
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oai:doaj.org-article:4c7f0cf378a14e1e81fed124cc02c5c52021-11-25T19:07:48ZThe North–South Asymmetry of Sunspot Relative Numbers Based on Complex Network Technique10.3390/sym131122282073-8994https://doaj.org/article/4c7f0cf378a14e1e81fed124cc02c5c52021-11-01T00:00:00Zhttps://www.mdpi.com/2073-8994/13/11/2228https://doaj.org/toc/2073-8994Solar magnetic activity exhibits a complex nonlinear behavior, but its dynamic process has not been fully understood. As the complex network technique can better capture the dynamics of nonlinear system, the visibility graphs (VG), the horizontal visibility graphs (HVG), and the limited penetrable visibility graphs (LPVG) are applied to implement the mapping of sunspot relative numbers in the northern and southern hemispheres. The results show that these three methods can capture important information of nonlinear dynamics existing in the long-term hemispheric sunspot activity. In the presentation of the results, the network degree sequence of the HVG method changes preferentially to the original data series as well as the VG and the LPVG, while both the VG and the LPVG slightly lag behind the original time series, which provides some new ideas for the nonlinear dynamics of the hemispheric asymmetry in the two hemispheres. Meanwhile, the use of statistical feature-skewness values and complex network visibility graphs can yield some complementary information for mutual verification.Hengyu XuYu FeiChun LiJiajuan LiangXinan TianZhongjie WanMDPI AGarticlesolar activityhemispheric asymmetrysunspot numberscomplex networksMathematicsQA1-939ENSymmetry, Vol 13, Iss 2228, p 2228 (2021) |
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DOAJ |
| collection |
DOAJ |
| language |
EN |
| topic |
solar activity hemispheric asymmetry sunspot numbers complex networks Mathematics QA1-939 |
| spellingShingle |
solar activity hemispheric asymmetry sunspot numbers complex networks Mathematics QA1-939 Hengyu Xu Yu Fei Chun Li Jiajuan Liang Xinan Tian Zhongjie Wan The North–South Asymmetry of Sunspot Relative Numbers Based on Complex Network Technique |
| description |
Solar magnetic activity exhibits a complex nonlinear behavior, but its dynamic process has not been fully understood. As the complex network technique can better capture the dynamics of nonlinear system, the visibility graphs (VG), the horizontal visibility graphs (HVG), and the limited penetrable visibility graphs (LPVG) are applied to implement the mapping of sunspot relative numbers in the northern and southern hemispheres. The results show that these three methods can capture important information of nonlinear dynamics existing in the long-term hemispheric sunspot activity. In the presentation of the results, the network degree sequence of the HVG method changes preferentially to the original data series as well as the VG and the LPVG, while both the VG and the LPVG slightly lag behind the original time series, which provides some new ideas for the nonlinear dynamics of the hemispheric asymmetry in the two hemispheres. Meanwhile, the use of statistical feature-skewness values and complex network visibility graphs can yield some complementary information for mutual verification. |
| format |
article |
| author |
Hengyu Xu Yu Fei Chun Li Jiajuan Liang Xinan Tian Zhongjie Wan |
| author_facet |
Hengyu Xu Yu Fei Chun Li Jiajuan Liang Xinan Tian Zhongjie Wan |
| author_sort |
Hengyu Xu |
| title |
The North–South Asymmetry of Sunspot Relative Numbers Based on Complex Network Technique |
| title_short |
The North–South Asymmetry of Sunspot Relative Numbers Based on Complex Network Technique |
| title_full |
The North–South Asymmetry of Sunspot Relative Numbers Based on Complex Network Technique |
| title_fullStr |
The North–South Asymmetry of Sunspot Relative Numbers Based on Complex Network Technique |
| title_full_unstemmed |
The North–South Asymmetry of Sunspot Relative Numbers Based on Complex Network Technique |
| title_sort |
north–south asymmetry of sunspot relative numbers based on complex network technique |
| publisher |
MDPI AG |
| publishDate |
2021 |
| url |
https://doaj.org/article/4c7f0cf378a14e1e81fed124cc02c5c5 |
| work_keys_str_mv |
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