Table 3. Spearman's correlation coefficients matrix of meteorological variables in Guangzhou, southern China, 2005–2012.

	Maximum temperature	Mean temperature	Minimum temperature	Relative humidity	Wind velocity	Atmospheric pressure
Maximum temperature	1.00
Mean temperature	0.97**	1.00
Minimum temperature	0.908**	0.973**	1.00
Relative humidity	0.003	0.077**	0.178**	1.00
Wind velocity	−0.108**	−0.085**	−0.058**	−0.004	1.00
Atmospheric pressure	−0.775**	−0.815**	−0.827**	−0.396**	−0.105**	1.00

^**P < 0.01