Table 5 Deposition velocities of water-soluble inorganic ions during the daytime and night at 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
Ions | Olympic Forest Park Vd (cm·s− 1) | Jiufeng National Forest Park Vd (cm·s− 1) | ||||
|---|---|---|---|---|---|---|
Daytime (n = 27) | Nighttime (n = 18) | Vd (day)/Vd (night) | Daytime (n = 27) | Nighttime (n = 18) | Vd (day)/Vd (night) | |
Na+ | 0.38 ± 0.40 | 0.14 ± 0.30 | 2.68 | 1.11 ± 0.31 | 0.61 ± 0.20 | 1.81 |
NH4+ | −0.13 ± 0.30 | −0.01 ± 0.09 | 13.00 | 0.67 ± 0.32 | 0.25 ± 0.12 | 2.65 |
K+ | 0.59 ± 0.69 | 0.04 ± 0.42 | 14.65 | 1.34 ± 0.48 | 0.51 ± 0.35 | 2.64 |
Mg2+ | 0.45 ± 0.24 | 0.19 ± 0.20 | 2.35 | 1.23 ± 0.29 | 0.79 ± 0.38 | 1.56 |
Ca2+ | 1.14 ± 0.33 | 0.40 ± 0.32 | 2.83 | 1.31 ± 0.95 | 0.80 ± 0.52 | 1.63 |
Cl− | 0.05 ± 0.16 | −0.12 ± 0.86 | −0.40 | 0.66 ± 0.22 | 0.27 ± 0.13 | 2.48 |
NO3− | 0.29 ± 0.12 | 0.15 ± 0.11 | 1.92 | 0.45 ± 0.41 | 0.24 ± 0.18 | 1.92 |
SO42− | 1.21 ± 0.24 | 0.33 ± 0.42 | 3.71 | 1.89 ± 0.58 | 0.84 ± 0.17 | 2.25 |