PM2.5 | UFPNC* | NO2 | NOx | CO | O3 | Temperature | |
PM10 | 0.79 | 0.37 | 0.43 | 0.40 | 0.45 | −0.32 | 0.25 |
PM2.5 | 0.40 | 0.41 | 0.39 | 0.45 | −0.20 | −0.01 | |
UFPNC | 0.67 | 0.65 | 0.52 | −0.12 | −0.06 | ||
NO2 | 0.98 | 0.75 | −0.58 | −0.21 | |||
NOx | 0.74 | −0.62 | −0.21 | ||||
CO | −0.63 | −0.52 | |||||
O3 | 0.43 |
CO, carbon monoxide; NOx, nitrogen oxide; NO2, nitrogen dioxide; O3, ozone; PM2.5, PM10, particulate matter <2.5 and <10 μm in diameter; UFPNC, ultrafine particles.
*Total concentration of ultrafine particles 10–700 nm in diameter (95% of total concentration comes from particles <100 nm).