Cycle Analysis Method of Tree Ring and Solar Activity Based on Variational Mode Decomposition and Hilbert Transform
Joint Authors
Li, Guohui
Yang, Hong
Zheng, Mengtao
Source
Issue
Vol. 2019, Issue 2019 (31 Dec. 2019), pp.1-8, 8 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2019-01-08
Country of Publication
Egypt
No. of Pages
8
Main Subjects
Abstract EN
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.
American Psychological Association (APA)
Li, Guohui& Zheng, Mengtao& Yang, Hong. 2019. Cycle Analysis Method of Tree Ring and Solar Activity Based on Variational Mode Decomposition and Hilbert Transform. Advances in Meteorology،Vol. 2019, no. 2019, pp.1-8.
https://search.emarefa.net/detail/BIM-1118543
Modern Language Association (MLA)
Li, Guohui…[et al.]. Cycle Analysis Method of Tree Ring and Solar Activity Based on Variational Mode Decomposition and Hilbert Transform. Advances in Meteorology No. 2019 (2019), pp.1-8.
https://search.emarefa.net/detail/BIM-1118543
American Medical Association (AMA)
Li, Guohui& Zheng, Mengtao& Yang, Hong. Cycle Analysis Method of Tree Ring and Solar Activity Based on Variational Mode Decomposition and Hilbert Transform. Advances in Meteorology. 2019. Vol. 2019, no. 2019, pp.1-8.
https://search.emarefa.net/detail/BIM-1118543
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1118543