Correlations between daily concentrations of gaseous air pollutants* and particulate matter† and weather conditions in Toronto
| Air pollutant | Weather condition | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Air pollutant | CO‡ | SO2‡ | NO2‡ | O3§ | PM2.5‡ | PM10-2.5‡ | PM10‡ | Maximum temperature | Minimum temperature | Relative humidity‡ |
| *CO=carbon monoxide; SO2=sulphur dioxide; NO2=nitrogen dioxide; O3=ozone. †PM2.5=particulate matter less than 2.5 microns in aerodynamic diameter; PM10-2.5=coarse particulate matter between 2.5 and 10 microns in aerodynamic diameter; PM10=particulate matter less than 10 microns in aerodynamic diameter. ‡Daily average level. §Daily maximum one hour level. | ||||||||||
| CO | 1.00 | 0.37 | 0.55 | −0.16 | 0.45 | 0.17 | 0.38 | −0.10 | −0.09 | 0.27 |
| SO2 | 1.00 | 0.54 | −0.01 | 0.46 | 0.28 | 0.44 | −0.07 | −0.14 | 0.04 | |
| NO2 | 1.00 | 0.03 | 0.50 | 0.38 | 0.52 | −0.01 | −0.05 | 0.09 | ||
| O3 | 1.00 | 0.21 | 0.56 | 0.44 | 0.67 | 0.57 | −0.42 | |||