Table 2.
Descriptive statistics for air pollutants and meteorological factors for Shenzhen (2013).
| Item | Mean ± SD | Min | P (25) | Median | P (75) | Max |
|---|---|---|---|---|---|---|
| Air pollutant | ||||||
| SO2 (μg/m3) | 13 ± 5.5 | 5.0 | 8.1 | 10.5 | 14.2 | 53.4 |
| NO2 (μg/m3) | 39 ± 16.4 | 14.8 | 29.8 | 37.6 | 49.0 | 104.8 |
| PM10 (μg/m3) | 62 ± 34.8 | 10.3 | 35.4 | 50.3 | 80.7 | 184.8 |
| PM2.5 (μg/m3) | 43 ± 24.6 | 8.3 | 21.3 | 34.9 | 54.7 | 135.8 |
| Meteorological factors | ||||||
| Temperature (°C) | 23.5 ± 4.9 | 9.8 | 19.8 | 24.6 | 27.7 | 31.2 |
| Pressure (hPa) | 1004.9 ± 6.1 | 986.8 | 1000.2 | 1004.6 | 1010.1 | 1019.2 |
| Relative humidity (%) | 75.5 ± 14.8 | 24 | 68 | 78 | 87 | 100 |