南京市江宁区2010年气象因素对SO2等大气污染物浓度的影响

目的探讨气象因素对大气污染物浓度的影响,以期建立气象因素与大气污染物浓度关系的模型。方法收集南京市江宁区2010年气象资料(日平均气压、日最高气压、日最低气压、日平均气温、日最高气温、日最低气温、日平均相对湿度、日最小相对湿度、日降水量、日平均风速、日照时数)和大气主要污染物(SO2、NO2、PM2.5)浓度资料,以气象因素对大气污染物浓度进行多元线性回归分析,建立多元回归方程。结果 SO2日平均浓度与日最高气压和日最高气温呈负相关,与最低气压呈正相关;NO2日平均浓度与最低气温呈负相关;PM2.5日平均浓度与日最小相对湿度和日平均风速呈负相关。结论气象因素的变化对于大气污染物浓度有一定影响。在污染物特征及地形地貌基本不变、总的污染物排放相对稳定的情况下,通过建立多元回归方程可以预测气象因素变化对大气污染物浓度的影响。

Effects of meteorological factors on concentration of SO2 and other atmospheric pollutants in Jiangning District of Nanjing,2010

Objective To explore the effects of meteorological factors on concentration of atmospheric pollutants and to establish a model of relationship between the meteorological factors and concentration of atmospheric pollutants. Methods The data of the air concentration of SO2 ,NO2 and PM2.5 and the related meteorological factors（daily average, maximum and minimum atmospheric pressure and air temperature, daily average and minimum relative humidity, daily rainfall, daily average wind speed, hours of sunshine）were collected. The correlation between the meteorological factors and concentration of atmospheric pollutants was analyzed by the multiple regression model and the multiple regression equations were established. Results Daily maximum atmospheric pressure and air temperature were negatively correlated with the air concentration of SO2 ;daily minimum air temperature was negatively correlated with the air concentration of NO2 daily minimum relative humidity and daily average wind speed were negatively correlated with the air concentration of PMz. 5. Conclusion The meteorological factors have some effects on concentration of atmospheric pollutants. Under the conditions that characters of atmospheric pollutants, landform and total emissions of atmospheric pollutants are invariant or stable, effects of meteorological factors on concentration of atmospheric pollutants can be forecasted by establishing multiple regression equations.