Table 3.

Spearman correlation coefficients among air pollution and meteorological factors in Shenzhen from 2008 to 2014

Variables	SO2	NO2	PM10	O3	CO	Temperature	Relative humidity
SO2	1.0000	0.6344	0.7017	0.1404	0.4063	−0.2481	−0.4962
NO2	0.6344	1.0000	0.7008	0.0685	0.2926	−0.3123	−0.2382
PM10	0.7017	0.7008	1.0000	0.4623	0.3485	−0.3225	− 0.5461
O3	0.1404	0.0685	0.4623	1.0000	−0.0101	− 0.0380	− 0.4165
CO	0.4063	0.2926	0.3485	−0.0101	1.0000	−0.3223	− 0.2073
Temperature	−0.2481	− 0.3123	− 0.3225	−0.0380	− 0.3223	1.0000	0.3078
Relative humidity	−0.4962	−0.2382	− 0.5461	−0.4165	− 0.2073	0.3078	1.0000

Note: SO₂ sulfur dioxide; NO₂ nitrogen dioxide; PM₁₀ particulate matter less than 10 μm in aerodynamic diameter; CO carbon monoxide; O₃ ozone