Table 4 . Descriptive Statistics of Daily Values of Air Pollutants and Climatic Factor .
| Measured Daily Variable | Minimum | Maximum | Mean | Std. Deviation | The Day with Extreme Value |
| O3, ppb | .00 | 52.38 | 17.2 | 16.0 | 2009/August/12 |
| NO, ppb | 1.13 | 92.67 | 19.9 | 14.96 | 2009/January/4 |
| NO2, ppb | 2.00 | 23.54 | 10.2 | 3.7 | 2009/January/17 |
| NOx, ppb | 4.29 | 111.88 | 30.2 | 17.85 | 2009/January/4 |
| PM10, ug/m3 | .00 | 2758.60 | 162.6 | 223.14 | 2009/July/5 |
| SO2, ppb | 7.42 | 101.63 | 33.9 | 19.26 | 2009/July/23 |
| CO, ppm | 0.31 | 4.24 | 1.6 | 0.798 | 2008/December/6 |
| Tem,°C | -5.20 | 30.50 | 15.3 | 9.54 | 2009/August/17 |
| Rain, mm | .00 | 26.90 | 0.9 | 3.56 | 2008/October/26 |
| Pressure | 858.70 | 881.70 | 868.5 | 3.91 | 2009/January/14 |
| MinHum, % | 3.00 | 93.00 | 23.9 | 17.70 | 2009/January/21 |
| MaxHum, % | 21.00 | 100.00 | 67.1 | 27.57 | 2008/November/1 |
| AveHum, % | 12.50 | 97.00 | 45.6 | 21.52 | 2009/January/21 |