Table 3 The Spearman correlation between weather variables and air pollutants during the study period
Indicator | Temperature | Humidity | Rainfall | Pressure | Wind velocity | PM2.5 | PM10 | SO2 | CO | NO2 | O3 |
|---|---|---|---|---|---|---|---|---|---|---|---|
Temperature | 1.000 | 0.108 | 0.027 | −0.906 | 0.060 | −0.390 | −0.183 | −0.550 | −0.308 | −0.264 | 0.553 |
Humidity | 1.000 | 0.659 | −0.237 | − 0.065 | − 0.188 | − 0.419 | −0.405 | 0.028 | − 0.284 | − 0.292 | |
Rainfall | 1.000 | − 0.172 | 0.175 | − 0.329 | − 0.487 | − 0.318 | − 0.175 | − 0.276 | − 0.225 | ||
Pressure | 1.000 | −0.084 | 0.360 | 0.211 | 0.524 | 0.267 | 0.306 | −0.461 | |||
Wind velocity | 1.000 | −0.292 | − 0.304 | −0.128 | − 0.399 | −0.401 | 0.005 | ||||
PM2.5 | 1.000 | 0.845 | 0.530 | 0.788 | 0.323 | −0.207 | |||||
PM10 | 1.000 | 0.585 | 0.682 | 0.435 | 0.012 | ||||||
SO2 | 1.000 | 0.511 | 0.235 | −0.322 | |||||||
CO | 1.000 | 0.453 | −0.213 | ||||||||
NO2 | 1.000 | 0.228 | |||||||||
O3 | 1.000 |