Table 2.
Deweathered mass concentrations (averages + standard deviations) of aerosol species and OA factors, gaseous pollutants, and meteorological parameters during three different periods.
| Species | NPhs | SPhs | NPnhs |
|---|---|---|---|
| Aerosol species (μg m−3) | |||
| PM1 | 72.1 ± 17.4 | 53.1 ± 13.5 | 48.7 ± 11.4 |
| OA | 36.0 ± 9.5 | 26.6 ± 6.9 | 20.4 ± 4.8 |
| HOA | 6.2 ± 2.0 | 2.4 ± 1.3 | 1.9 ± 0.7 |
| COA | 6.5 ± 2.3 | 2.7 ± 1.2 | 1.9 ± 0.8 |
| CCOA | 12.8 ± 4.3 | 8.1 ± 2.7 | 1.9 ± 1.7 |
| BBOA | 2.2 ± 0.7 | 2.0 ± 0.6 | 1.9 ± 0.3 |
| OOA | 8.3 ± 2.8 | 11.4 ± 3.0 (LSOA:10.0 ± 2.4; RSOA:1.4 ± 0.8) | 12.8 ± 3.1 (LSOA:9.9 ± 2.9; RSOA: 2.9 ± 0.4) |
| SO42− | 7.2 ± 1.7 | 4.5 ± 1.0 | 4.9 ± 2.2 |
| NO3− | 9.3 ± 2.0 | 10.7 ± 4.1 | 13.0 ± 3.6 |
| NH4+ | 6.9 ± 1.5 | 6.1 ± 1.5 | 7.1 ± 1.6 |
| Cl− | 5.6 ± 1.6 | 2.8 ± 0.8 | 1.2 ± 0.6 |
| BC | 7.1 ± 1.8 | 2.4 ± 1.0 | 2.1 ± 0.5 |
| Gaseous pollutants | |||
| SO2 (ppb) | 21.1 ± 4.8 | 9.1 ± 1.9 | 5.3 ± 0.9 |
| CO (ppm) | 2.0 ± 0.5 | 1.1 ± 0.4 | 2.1 ± 0.6 |
| NO (ppb) | 39.2 ± 11.3 | 17.9 ± 12.7 | 10.9 ± 8.1 |
| NO2 (ppb) | 39.2 ± 6.6 | 26.4 ± 6.2 | 26.8 ± 4.4 |
| O3 (ppb) | 10.4 ± 3.9 | 14.2 ± 6.0 | 17.9 ± 9.6 |
| Meteorological parameters | |||
| RH (%) | 31.7 ± 14.9 | 35.2 ± 19.8 | 38.1 ± 21.6 |
| T (°C) | 1.8 ± 3.5 | −0.2 ± 6.0 | 14.8 ± 5.6 |
| WS (m s−1) | 1.7 ± 1.8 | 1.9 ± 1.3 | 1.8 ± 1.1 |