Table 3.
Spearman correlation coefficients between air pollutants and weather conditions during the 7-year study period (upper right triangle), and during the warm period (lower left triangle)
| PM2.5 | PM10 | NO2 | SO2 | O3 | Temperature | Humidity | |
|---|---|---|---|---|---|---|---|
| PM2.5 | 1.000 | 0.915 | 0.802 | 0.516 | 0.427 | −0.570 | −0.406 |
| PM10 | 0.915 | 1.000 | 0.758 | 0.472 | 0.422 | −0.544 | −0.441 |
| NO2 | 0.694 | 0.705 | 1.000 | 0.509 | 0.116 | −0.758 | −0.323 |
| SO2 | 0.396 | 0.392 | 0.481 | 1.000 | 0.209 | −0.206 | −0.302 |
| O3 | 0.775 | 0.750 | 0.489 | 0.226 | 1.000 | 0.068 | −0.397 |
| Temperature | −0.355 | −0.393 | −0.589 | −0.163 | −0.296 | 1.000 | 0.257 |
| Humidity | −0.233 | −0.266 | −0.054 | −0.120 | −0.303 | −0.258 | 1.000 |