郑州市气象因子对大气颗粒物浓度的影响研究

Study on the Influence of Meteorological Factors to Concentration of Atmospheric Particulate Matter in Zhengzhou City

基于2015、2016年河南省环境监测中心站获取的郑州市9个监测点颗粒物浓度和逐日气象数据,对气象因素和颗粒物浓度相关性进行了研究。结果表明:郑州市大气颗粒物浓度受季节影响较强,总体呈现冬季高、夏季低的趋势。降水量与大气颗粒物浓度呈现明显的负相关。相对湿度的增高不利于PM_(2. 5)浓度的降低,而PM_(10)的浓度则随着相对湿度的增高有所降低。春夏秋三季的主要风向为东北偏东,当春季风为东南风和西风时,颗粒物浓度最低;当夏季风为东北偏东风时,颗粒物浓度最低;秋季吹东北风时,颗粒物浓度最低。冬季吹西北风(郑州冬季盛行风向)时,大气颗粒物质量浓度最低。

Based on the particulate concentration and daily meteorological data at 9 monitoring sites in Zhengzhou, Henan province, obtained from 2015 and 2016, the correlations between meteorological factors and particulate concentrations were studied. The results show that the concentration of atmospheric particulates in Zhengzhou is strongly influenced by seasons, while the overall trend is high in winter and low in summer. Precipitation has a significant negative correlation with atmospheric particulate concentrations. The increase of relative humidity is not conducive to the reduction of PM2.5 concentration, while the concentration of PM10 decreases with the increase of relative humidity. In the spring, summer and autumn, the main wind direction is northeast by east. When the spring winds are southeast and westerly, the concentration of particulate matter is the lowest; when the summer wind is northeast easterly, the concentration of particulates is the lowest; when the autumn wind is northeast, the concentration of particulates is the lowest. In winter, when the prevailing wind is northwest （the prevailing wind direction in Zhengzhou in winter）, the concentration of atmospheric particles is the lowest.