Table 2. Tree-ring widths and synchronization between the inter-annual tree-ring variations from all the OTCs

Variable	Tree-ring width (mm)		Correlation coefficient between inter-annual tree-ring variation
	Mean	SD	OTC-I	OTC-II	OTC-III
OTC-I	5.81	2.82	-	p < 0.05	p < 0.05
OTC-II	6.04	3.57	0.82	-	p < 0.05
OTC-III	7.88	3.72	0.89	0.95	-

OTC: open-top chamber.