Cycle Analysis Method of Tree Ring and Solar Activity Based on Variational Mode Decomposition and Hilbert Transform

Table 2

Variance contribution rate, correlation coefficient calculation, and sorting condition of IMF components of the sunspot number.

Component	IMF1	IMF2	IMF3	IMF4	IMF5	Res
Quasicycles/year	102.1	52.2	9.9	8.3	10.8
Variance contribution rate (%)	10.15	6.54	16.41	6.57	54.53	5.84
Correlation coefficient	0.35	0.29	0.47	0.28	0.74
Sequencing	3	5	2	4	1