Table 2

Correlation coefficients of the cross correlation function between air pollution and temporal variables using Spearman rank correlation

Day of the weekYearSeasonNOPM10 O3
Day of the week0.0030.0000.0400.099−0.024
PM10 0.0010.0280.777<0.001−0.203
O3 0.4190.0630.868<0.001<0.001
  • Note: above the diagonal are the correlation coefficients r, below all p values

  • NO, nitric oxide; O3, ozone; PM10, particulate matter with an aerodynamic diameter of ≤10 µm.