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Table 3 Deposition flux 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 F (μg·m−2·s−1)

Jiufeng National Forest Park F (μg·m−2·s− 1)

Daytime (n = 27)

Nighttime (n = 18)

Daytime (n = 27)

Nighttime (n = 18)

Na+

− 0.0214 ± 0.0157

− 0.0016 ± 0.0097

−0.0228 ± 0.0110

− 0.0174 ± 0.0095

NH4+

− 0.0010 ± 0.0370

0.0063 ± 0.0213

−0.0947 ± 0.0735

−0.0221 ± 0.0107

K+

−0.1690 ± 0.2373

0.0115 ± 0.0596

−0.0526 ± 0.0286

−0.0124 ± 0.0097

Mg2+

−0.0170 ± 0.0103

−0.0063 ± 0.0200

−0.0130 ± 0.0120

−0.0084 ± 0.0053

Ca2+

−0.1276 ± 0.0481

−0.0554 ± 0.0438

−0.0766 ± 0.0512

−0.0458 ± 0.0208

Cl

−0.0665 ± 0.1329

0.0215 ± 0.0494

−0.0584 ± 0.0210

−0.0152 ± 0.0084

NO3

−0.2984 ± 0.3114

−0.1785 ± 0.1089

−0.7168 ± 0.5892

−0.2010 ± 0.1613

SO42−

− 7.2279 ± 5.0425

− 2.2624 ± 2.4174

−9.0948 ± 7.1419

− 2.0206 ± 1.4805

  1. The ranges (± values) correspond to standard deviations