Table 2 Summary of data on Asian dust, other air pollutants and meteorological factors (March 2014–May 2016)

Asian dust extinction coefficients (/km)

0.11

0.09

0.05

0.03

0.03

0.02

< 0.01^a

0.07

0.04

0.05

0.04

0.03

0.03

< 0.01^a

Spherical extinction coefficients (/km)

0.21

0.16

0.19

0.13

0.11

0.09

0.02^a

0.17

0.14

0.13

0.14

0.07

0.12

0.35^a

SO₂ (ppb)

1.45

0.67

1.40

1.19

0.94

1.00

0.11^a

1.90

0.83

1.70

1.34

0.88

1.15

< 0.01^a

NO₂ (ppb)

4.32

1.79

3.50

4.19

1.82

3.90

0.84^a

7.02

2.00

7.50

6.68

2.34

6.20

0.50^a

Ox (ppb)

58.5

9.24

58.2

51.6

9.69

51.2

0.02^a

72.8

14.9

75.0

62.1

12.0

60.5

0.03^b

SPM (μg/m³)

37.1

12.6

36.3

22.5

11.9

20.1

< 0.01^a

42.9

18.4

36.9

23.4

9.4

22.1

< 0.01^a

Average temperature (°C)

15.3

3.59

16.5

15.2

4.07

15.9

0.94^a

17.3

3.9

18.8

15.8

4.4

16.6

0.11^a

Maximum temperature (°C)

19.7

3.45

20.6

19.4

4.36

20.0

0.89^a

21.7

4.1

22.3

20.2

4.7

20.8

0.17^a

Minimum temperature (°C)

10.7

4.70

11.7

10.8

4.47

11.4

0.95^a

13.2

4.3

14.6

12.0

4.6

12.8

0.18^a

Humidity (%)

73.8

8.12

73.0

75.1

12.7

75.0

0.59^a

67.0

10.9

67.0

69.9

12.4

69.0

0.27^b