A Comparison of Thermal Growing Season Indices for the Northern China during 1961–2015

Table 4

Correlation coefficients for combinations of indices of growing season length. Single bold values show the mean coefficient over northern China, and the paired values below show the minimum (left) and maximum (right) coefficients.

Length of GS	SI 2 | EI 2 (LI 2)			SI 3 | EI 3 (LI 3)			SI 4 | EI 3 (LI 4)			SI 3 | EI 4 (LI 5)			SI 4 | EI 5 (LI 6)
SI 1 | EI 1 (LI 1)		0.84			0.83			0.77			0.89			0.77
	0.64		0.97	0.48		0.97	0.37		0.96	0.34		1.00	0.32		0.95
SI 2 | EI 2 (LI 2)		—			0.74			0.83			0.76			0.88
				0.38		0.93	0.51		0.96	0.31		0.95	0.40		1.00
SI 3 | EI 3 (LI 3)		—			—			0.92			0.90			0.81
							0.74		1.00	0.54		0.98	0.40		0.97
SI 4 | EI 3 (LI 4)		—			—			—			0.83			0.88
										0.49		0.97	0.56		0.98
SI 3 | EI 4 (LI 5)		—			—			—			—			0.89
													0.65		0.99