Table 2 Summary statistics of daily concentrations of air pollutants and meteorological indices

PM_2.5 (μg/m³)

13.9

26.9

20.9

19.9

24.2

26.7

24.1

25.3

37.2

PM₁₀ (μg/m³)

19.6

39.1

33.0

26.0

30.8

36.5

31.8

33.7

59.9

OBC (μg/m³)

0.4

0.7

0.4

0.4

0.4

0.4

0.5

0.4

0.8

NO₂ (ppb)

15.9

13.4

11.8

11.3

12.0

14.2

12.6

12.1

14.5

Ozone (ppb)

20.7

26.4

32.5

19.9

23.0

26.8

23.6

27.7

30.6

Atmospheric pressure (hPa)

1,014.5

1,014.8

1,013.7

1,015.6

1,014.7

1,012.6

1,016.8

1,016.5

1,011.7

Relative humidity (%)

64

68

65

67

67

68

68

69

67

Temperature (°C)

2.4

5.8

6.5

4.1

3.7

7.8

3.5

4.6

9.0

Wind speed (m/s)

2.8

2.3

2.5

2.5

2.7

2.8

2.5

2.4

2.7

Daylight (h)

6.3

5.5

6.0

4.6

4.6

4.4

5.4

4.7

5.7