Table 3.

Correlation coefficients between soil temperature variables ($S{T}_{\max }$, $S{T}_{\min }$, and SDTR) and other climatological variables including DTR, sunshine duration (SD), precipitation (p), relative humidity (h), and surface wind speed (V) on annual and seasonal scales in China during 1962–2011.

Variable	$\mathit{S}{\mathit{T}}_{\mathit{max}}$	$\mathit{S}{\mathit{T}}_{\mathit{min}}$	SDTR
Annual
SD	0.44 *	–0.62 *	0.73 *
p	–0.47 *	0.06	–0.55 *
h	–0.12	–0.42	–0.21
V	–0.59 *	–0.74 *	0.31 *
Winter
SD	0.46 *	–0.50 *	0.78 *
p	–0.44 *	0.28 *	–0.57 *
h	–0.23 *	–0.01	–0.15
V	–0.20	–0.62 *	0.43 *
Spring
SD	0.40 *	–0.30 *	0.74 *
p	–0.41 *	0.20	–0.68 *
h	–0.30	–0.14	–0.13 *
V	–0.57 *	–0.72 *	–0.12
Summer
SD	0.12 *	–0.55 *	0.61 *
p	–0.41 *	0.14	–0.61 *
h	–0.37 *	–0.39 *	–0.06
V	–0.36 *	–0.72 *	0.18
Autumn
SD	0.20 *	–0.53 *	0.77 *
p	–0.59 *	0.01	–0.64 *
h	–0.28 *	–0.07	–0.34 *
V	–0.59 *	–0.66 *	0.07

* p < 0.05.