Table 3 Pearson correlation coefficients among weather variables and pollutants

Mean temperature (°C)

1

−0.824^*

0.419^*

−0.123^*

−0.587^*

−0.589^*

0.346^*

Atmospheric pressure (hPa)

1

–.0368^*

0.087^*

0.411^*

0.582^*

−0.502^*

Humidity (%)

1

−0.603^*

−0.312^*

−0.348^*

0.047

Insolation (hours)

1

0.086^*

0.122^*

0.231^*

PM₁₀ (μg/m³)

1

0.686^*

−0.038

NO₂ (ppb)

1

−0.463^*

O₃ (ppb)

1