Correlations between different air pollutants and meteorological variables
SO2 | NO2 | PM10 | O3 | PM2.5 | Temperature | Humidity | ||
---|---|---|---|---|---|---|---|---|
r, Pearson correlation coefficient; SO2, sulphur dioxide; NO2, nitrogen dioxide; O3, ozone; PM10, PM2.5, particulates with an aerodynamic diameter <10 μm or <2.5 μm. | ||||||||
SO2 | r | 1.00 | 0.659* | 0.229* | −0.037* | 0.282 | 0.084* | 0.169* |
p value | — | <0.001 | <0.001 | 0.111 | <0.001 | <0.001 | <0.001 | |
NO2 | r | 1.00 | 0.399* | 0.338* | 0.441 | −0.268* | 0.212* | |
p value | — | <0.001 | <0.001 | <0.001 | <0.001 | <0.001 | ||
PM10 | r | 1.00 | 0.421* | 0.952 | −0.344* | −0.390* | ||
p value | — | <0.001 | <0.001 | <0.001 | <0.001 | |||
O3 | r | 1.00 | 0.394 | −0.028 | −0.106* | |||
p value | — | <0.001 | 0.236 | <0.001 | ||||
PM2.5 | r | 1.00 | −0.356 | −0.343 | ||||
p value | — | <0.001 | <0.001 | |||||
Temperature | r | 1.00 | 0.127* | |||||
p value | — | 0.001 | ||||||
Humidity | r | 1.00 | ||||||
p value | — |