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

Table 2

Pearson’s correlation coefficient () for combination of the start indices of the growing season. Single bold values show the mean coefficients over northern China, and the paired values below show the minimum (left) and maximum (right) coefficients.

Start of GS	>5 d > 5°C (SI 2)			=5 d > 5°C Fr (SI 3)			>5 d > 5°C Fr (SI 4)
=5 d > 5°C (SI 1)		0.85			0.89			0.79
	0.56		0.99	0.37		1.00	0.34		0.97
>5 d > 5°C (SI 2)		—			0.79			0.93
				0.39		0.97	0.57		1.00
=5 d > 5°C Fr (SI 3)		—			—			0.88
							0.61		1.00

Note. , correlation is significant at the 0.05 level; , correlation is significant at the 0.01 level; , correlation is significant at the 0.001 level. The same as in Tables 3 and 4 and Figures 2, 4, and 6.