Pearson correlation coefficients between particle concentration, gaseous pollutants and weather conditions*
| Pollutants | PM10 | PM2.5 | PMc | NO2 | O3 | SO2 | Temperature |
|---|---|---|---|---|---|---|---|
| PM10 | 1.000 | ||||||
| PM2.5 | 0.956 | 1.000 | |||||
| PMc | 0.835 | 0.640 | 1.000 | ||||
| NO2 | 0.688 | 0.734 | 0.437 | 1.000 | |||
| O3 | 0.600 | 0.559 | 0.513 | 0.463 | 1.000 | ||
| SO2 | 0.458 | 0.496 | 0.273 | 0.593 | 0.312 | 1.000 | |
| Temperature | −0.400 | −0.413 | −0.292 | −0.282 | 0.144 | 0.067 | 1.000 |
| Relative humidity | −0.528 | −0.472 | −0.498 | −0.311 | −0.530 | −0.443 | 0.172 |
*All correlation coefficients except that between SO2 and temperature are statistically significant (p<0.05).
PM2.5, particles with an aerodynamic diameter less than 2.5 μm; PM10, particles with an aerodynamic diameter less than 10 μm; PMc, coarse particulate matter.