Table 2. Spearman rank correlations between measured microclimatic variables in SCBs.

Microclimate variables	Temperature	Relative humidity	Air speed	PM10	PM2.5	PM1	TSP	NH3	H2S	CO2
Temperature	1
Relative humidity	0.26	1
Air speed	0.9***	0.3	1
PM10	−0.52	−0.46	−0.39	1
PM2.5	−0.69**	−0.35	−0.7**	0.72**	1
PM1	−0.63*	−0.17	−0.64*	0.34	0.81***	1
TSP	−0.39	−0.48	−0.23	0.93***	0.53	0.18	1
NH3	−0.06	0.02	−0.28	−0.13	0.12	−0.02	−0.15	1
H2S	0.21	−0.11	−0.06	−0.11	0.04	−0.11	−0.15	0.68**	1
CO2	−0.26	−0.02	−0.46	0.19	0.48	0.3	0.14	0.82***	0.44	1

*P<0.05;

**P<0.01;

***P<0.001.