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Table 7 Meteorological conditions, friction velocity and Monin–Obukhov length in the Olympic Forest Park and Jiufeng National Forest Park

From: Deposition of water-soluble inorganic ions in PM2.5 in a typical forestry system in Beijing, China

 

Olympic Forest Park

Jiufeng National Forest Park

Daytime (n = 27)

Nighttime (n = 18)

Daytime (n = 27)

Nighttime (n = 18)

Temperature (°C)

21.38 ± 3.75

19.93 ± 3.20

20.85 ± 3.45

18.54 ± 4.03

Humidity (%)

53.79 ± 11.93

57.48 ± 12.32

58.43 ± 11.98

63.51 ± 17.17

wind speed (m·s− 1)

1.06 ± 0.64

0.79 ± 0.49

1.28 ± 0.73

0.96 ± 0.51

u* (m·s− 1)

0.36 ± 0.27

0.21 ± 0.09

0.42 ± 0.22

0.30 ± 0.13

L (m)

−17.13 ± 9.6

28.04 ± 14.52

−16.13 ± 8.77

22.64 ± 7.75