Table 2 Summary statistics for air pollutant concentrations and meteorological variables

Pollutants (Lag 0 day)

PM_2.5 (µg/m³)

46.73 ± 33.84

8.09

2.91

36.39

60.35

258.53

57.44

PM₁₀ (µg/m³)

72.00 ± 45.90

15.34

38.30

59.04

93.61

366.96

55.31

SO₂ (µg/m³)

11.86 ± 3.52

2.63

9.55

11.10

13.73

33.42

4.18

CO (mg/m³)

0.80 ± 0.01

0.35

0.64

0.75

0.91

1.84

0.27

Meteorology (Lag 0 day)

Temperature (℃)

17.67 ± 7.34

2.91

10.90

17.70

23.92

34.41

13.02

Relative humidity (%)

76.94 ± 10.11

44.00

70.26

77.86

84.20

98.86

13.94

Pollutants (control days)

PM_2.5 (µg/m³)

47.04 ± 33.11

7.00

22.95

36.42

62.73

212.03

39.78

PM₁₀ (µg/m³)

72.41 ± 44.62

16.04

38.07

59.29

97.49

268.03

59.42

SO₂ (µg/m³)

11.91 ± 3.67

3.821

9.35

11.20

13.61

38.11

4.26

CO (mg/m³)

0.80 ± 0.24

0.34

0.63

0.75

0.91

1.93

0.28

Meteorology (control days)

Temperature (℃)

17.63 ± 7.35

2.06

10.70

17.80

23.86

31.87

13.16

Relative humidity (%)

76.88 ± 10.12

43.61

69.91

77.37

85.23

96.73

15.32