Research Article
Air Pollution of Nature Reserves near Cities in Russia
Table 1
Particle size distribution in snow samples collected in Birobidzhan city.
| PM fraction (μm) | Distribution of PM in snow samples (%) | G1 | G2 | G3 | G4 | G5 | 1 | 2 | 3 | 1 | 2 | 3 | 1 | 2 | 3 | 1 | 2 | 3 | 1 | 2 | 3 |
| ≤1 | 9.7 | 2.3 | 1 | 0.8 | 0.6 | 0 | 4.1 | 2.1 | 0.9 | 7.5 | 2.9 | 0 | 3.8 | 3.3 | 3.1 | 1–10 | 41.9 | 22.1 | 19 | 55.1 | 4.7 | 25.8 | 31 | 23.6 | 15.7 | 64.9 | 30.2 | 0.9 | 47.2 | 36.3 | 10.2 | 10–50 | 19.5 | 39.6 | 33.9 | 36.7 | 8.2 | 0 | 42.1 | 55.7 | 29.5 | 13.5 | 33.6 | 0 | 44.6 | 38.7 | 3.6 | 50–100 | 0 | 9.2 | 0 | 0 | 0.5 | 0 | 2.7 | 17.3 | 0 | 0 | 0 | 0 | 4.4 | 3.9 | 0 | 100–400 | 0 | 3.7 | 1.9 | 0 | 30.8 | 0.3 | 12.7 | 1.3 | 0 | 0 | 16.8 | 0 | 0 | 2.7 | 6.5 | 400–700 | 7.5 | 11.8 | 35.5 | 0.3 | 46.7 | 45.9 | 7.4 | 0 | 4.9 | 0.9 | 16.2 | 9 | 0 | 0.8 | 41.1 | ≥700 | 21.4 | 11.3 | 8.7 | 7.1 | 8.5 | 28 | 0 | 0 | 49 | 13.2 | 0.3 | 90.1 | 0 | 14.3 | 35.5 | Mean diameter | 234.0 | 183.3 | 277.6 | 74.4 | 410.2 | 492.8 | 79.6 | 29.0 | 485.2 | 130.9 | 138.1 | 892.8 | 16.4 | 152.6 | 553.6 |
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