Research Article
Cycle Analysis Method of Tree Ring and Solar Activity Based on Variational Mode Decomposition and Hilbert Transform
Table 1
Variance contribution rate, correlation coefficient calculation, and sorting condition of IMF components of tree ring width.
| Component | IMF1 | IMF2 | IMF3 | IMF4 | IMF5 | IMF6 | IMF7 | IMF8 | IMF9 | Res |
| Quasicycles/year | 25.6 | 9.8 | 7.3 | 5.8 | 4.9 | 3.5 | 2.9 | 2.4 | 2.2 | | Variance contribution rate (%) | 10.01 | 15.14 | 15.56 | 8.88 | 6.61 | 5.52 | 3.95 | 7.86 | 5.32 | 21.17 | Correlation coefficient | 0.36 | 0.41 | 0.39 | 0.33 | 0.29 | 0.26 | 0.22 | 0.27 | 0.26 | | Sequencing | 3 | 2 | 1 | 4 | 6 | 8 | 9 | 5 | 7 | |
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