Table 3

Spearman’s rank coefficients between daily mean air pollutants and meteorological variables

VariablesPM2.5NO2O3TemperatureRelative humidityAir pressure
PM2.51.00
NO20.55*1.00
O30.56*0.021.00
Temperature−0.43*−0.27*−0.09*1.00
Relative humidity−0.53*−0.1*−0.51*0.27*1.00
Air pressure0.50*0.26*0.21*−0.85*−0.45*1.00
  • *P<0.05.

  • NO2, nitrogen dioxide; O3, ozone; PM2.5, fine particulate matter.