Cycle Analysis Method of Tree Ring and Solar Activity Based on Variational Mode Decomposition and Hilbert Transform
According to the correlation of tree ring and solar activity, the cycle analysis method based on variational mode decomposition (VMD) and Hilbert transform is proposed. Firstly, the tree ring width of cypress during 1700 to 1955 beside the Huangdi Tomb and the long-term sunspot number during 1700 to...
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| Format: | Article |
| Language: | English |
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Wiley
2019-01-01
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| Series: | Advances in Meteorology |
| Online Access: | http://dx.doi.org/10.1155/2019/1715673 |
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| _version_ | 1832563652428824576 |
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| author | Guohui Li Mengtao Zheng Hong Yang |
| author_facet | Guohui Li Mengtao Zheng Hong Yang |
| author_sort | Guohui Li |
| collection | DOAJ |
| description | According to the correlation of tree ring and solar activity, the cycle analysis method based on variational mode decomposition (VMD) and Hilbert transform is proposed. Firstly, the tree ring width of cypress during 1700 to 1955 beside the Huangdi Tomb and the long-term sunspot number during 1700 to 1955, respectively, are decomposed by VMD into a series of intrinsic mode functions (IMFs). Secondly, Hilbert transformation on the decomposed IMF component is performed. Then, the marginal spectra are given and analyzed. Finally, their quasiperiodic properties are obtained as follows: the tree ring width has the quasiperiodicity of 2 to 7a, 10.8a, and 25a; the sunspot number has the quasiperiodicity of 8.3a, 9.9a, 11.1a, 52.2a, and 101.2a. The result obtained by analyzing that quasiperiodicity shows that the main periods of tree ring width and the sunspot number in the same period are basically consistent, and tree ring width has other cycles. This shows that sunspot activity is an important factor affecting tree ring growth, and tree ring width is influenced by other external environments. |
| format | Article |
| id | doaj-art-a8cb3663364c44309e3c674179484aa5 |
| institution | Kabale University |
| issn | 1687-9309 1687-9317 |
| language | English |
| publishDate | 2019-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Meteorology |
| spelling | doaj-art-a8cb3663364c44309e3c674179484aa52025-02-03T01:12:57ZengWileyAdvances in Meteorology1687-93091687-93172019-01-01201910.1155/2019/17156731715673Cycle Analysis Method of Tree Ring and Solar Activity Based on Variational Mode Decomposition and Hilbert TransformGuohui Li0Mengtao Zheng1Hong Yang2School of Electronic Engineering, Xi’an University of Posts and Telecommunications, Xi’an, Shaanxi 710121, ChinaSchool of Electronic Engineering, Xi’an University of Posts and Telecommunications, Xi’an, Shaanxi 710121, ChinaSchool of Electronic Engineering, Xi’an University of Posts and Telecommunications, Xi’an, Shaanxi 710121, ChinaAccording to the correlation of tree ring and solar activity, the cycle analysis method based on variational mode decomposition (VMD) and Hilbert transform is proposed. Firstly, the tree ring width of cypress during 1700 to 1955 beside the Huangdi Tomb and the long-term sunspot number during 1700 to 1955, respectively, are decomposed by VMD into a series of intrinsic mode functions (IMFs). Secondly, Hilbert transformation on the decomposed IMF component is performed. Then, the marginal spectra are given and analyzed. Finally, their quasiperiodic properties are obtained as follows: the tree ring width has the quasiperiodicity of 2 to 7a, 10.8a, and 25a; the sunspot number has the quasiperiodicity of 8.3a, 9.9a, 11.1a, 52.2a, and 101.2a. The result obtained by analyzing that quasiperiodicity shows that the main periods of tree ring width and the sunspot number in the same period are basically consistent, and tree ring width has other cycles. This shows that sunspot activity is an important factor affecting tree ring growth, and tree ring width is influenced by other external environments.http://dx.doi.org/10.1155/2019/1715673 |
| spellingShingle | Guohui Li Mengtao Zheng Hong Yang Cycle Analysis Method of Tree Ring and Solar Activity Based on Variational Mode Decomposition and Hilbert Transform Advances in Meteorology |
| title | Cycle Analysis Method of Tree Ring and Solar Activity Based on Variational Mode Decomposition and Hilbert Transform |
| title_full | Cycle Analysis Method of Tree Ring and Solar Activity Based on Variational Mode Decomposition and Hilbert Transform |
| title_fullStr | Cycle Analysis Method of Tree Ring and Solar Activity Based on Variational Mode Decomposition and Hilbert Transform |
| title_full_unstemmed | Cycle Analysis Method of Tree Ring and Solar Activity Based on Variational Mode Decomposition and Hilbert Transform |
| title_short | Cycle Analysis Method of Tree Ring and Solar Activity Based on Variational Mode Decomposition and Hilbert Transform |
| title_sort | cycle analysis method of tree ring and solar activity based on variational mode decomposition and hilbert transform |
| url | http://dx.doi.org/10.1155/2019/1715673 |
| work_keys_str_mv | AT guohuili cycleanalysismethodoftreeringandsolaractivitybasedonvariationalmodedecompositionandhilberttransform AT mengtaozheng cycleanalysismethodoftreeringandsolaractivitybasedonvariationalmodedecompositionandhilberttransform AT hongyang cycleanalysismethodoftreeringandsolaractivitybasedonvariationalmodedecompositionandhilberttransform |