Table 1.
Descriptive statistics of air pollutants and meteorological factors from January 23, 2020 to April 6, 2020.
| Climatic variables | Mean (SD) | Median (IQR) | Minimum | Maximum |
|---|---|---|---|---|
| PM2.5, μg/m3 | 11.0 (2.37) | 10.9 (2.54) | 5.61 | 19.2 |
| PM10, μg/m3 | 24.7 (4.11) | 24.4 (4.98) | 14.9 | 35.3 |
| O3, μg/m3 | 29.5 (7.43) | 28.8 (10.3) | 13.2 | 44.9 |
| NO2, μg/m3 | 15.6 (5.01) | 15.0 (5.89) | 8.48 | 33.4 |
| CO, mg/m3 | 0.49 (0.052) | 0.49 (0.057) | 0.38 | 0.62 |
| SO2, μg/m3 | 3.71 (0.77) | 3.50 (0.76) | 2.80 | 7.24 |
| PSI | 44.0 (6.56) | 44.5 (6.93) | 24.7 | 58.1 |
| Temperature, °C | 28.2 (0.70) | 28.3 (0.67) | 26.3 | 29.5 |
| Rainfall, mm | 11.9 (19.9) | 3.02 (10.2) | 0 | 102 |
| Humidity, % | 76.5 (4.24) | 75.8 (6.25) | 68.3 | 87.3 |
Abbreviations: IQR: Interquartile Range, SD: Standard Deviation; NO2: nitrogen dioxide, SO2: sulphur dioxide, CO: carbon monoxide, O3: ozone, PSI: pollutant standards index, PM2.5: particulate matter with a diameter of 2.5 μm or less, PM10: particulate matter with a diameter of 10 μm or less.