Table 2.

Spearman correlations between airborne pollutants and meteorological variables in all cities during the study period

Factors	PM2.5	PM10	NO2	SO2	CO	O3	TEMP
PM10	0.793**
NO2	0.414**	0.331*
SO2	0.365*	0.244	0.355*
CO	0.563**	0.390*	0.302	0.364*
O3	0.196	0.193	0.056	0.068	-0.118
TEMP	-0.834**	-0.677**	-0.328*	-0.307	-0.576**	-0.278
RH	-0.388*	-0.327*	-0.448*	-0.012	-0.155	-0.531**	0.452**

Note: TEMP and RH indicate ambient temperature and relative humidity, respectively; * and ** indicate P < 0.05 and P < 0.01, respectively