Table 3

Spearman rank correlation between O3 concentration and air pollutants and meteorological variables

Sunlight (min/day)Wind (m/s)Temperature (°C)‡Humidity (%)§PM10 (μg/m3)SO2 (μg/m3)CO (μg/m3)NO2 (μg/m3)
Whole year0.570.180.74−0.48−0.22−0.54−0.64−0.58
Winter*0.200.630.32−0.39−0.60−0.37−0.60−0.51
Summer†0.580.060.70−0.480.44−0.15−0.220.02

  • ↵* December, January, February.

  • ↵† June, July, August, September.

  • ↵‡ Maximum temperature.

  • ↵§ Maximum humidity.

  • ↵ Daily wind mean.

  • PM10, particulate matter with an aerodiameter of ≤10 μg/m3.