合肥市大气污染时空变化及与气象因子相关性分析研究

Temporal and Spatial Changes of Air Pollution in Hefei and Its Correlation Analysis with Meteorological Elements

分析了合肥市大气污染时空变化及与气象因子相关性分析主要结论有:合肥市近年来大气环境质量趋于改善,PM_(2.5)、PM_(10)为首要污染源;污染物浓度冬季>春秋>夏季,一天内,上午7～10时和晚上20～23时污染物浓度最高;污染浓度北部较南部高,西部较东部高;大气污染物与气温、蒸发量、日照呈负相关关系,与气压为正相关,与湿度和风速相关性不明显;大气污染物PM_(2.5)、PM_(10)、SO_2、NO_2、CO之间均呈显著地正相关关系,与O_3负相关。

This paper analyzes the spatial and temporal changes of air pollution and the correlation with meteorological factors in Hefei City.It is concluded that the environmental quality of Hefei City tends to improve in recent years.PM2.5 and PM 10 are the primary pollution sources;The concentration of pollutants in descending order is winter>Spring and Autumn>Summer.The daily concentration peaks appear within 7-10 pm and 20-23 pm.The pollution concentration is higher in the north than in the south and higher in the west than in the east.Air pollutants are negatively correlated with temperature,evaporation,and sunshine,and positively correlated with air pressure.Correlation with humidity and wind speed is not obvious;atmospheric pollutants PM2.5,PM10,SO2,NO2,CO have a significant positive correlation,which is negatively correlated with O3.