连云港市PM_(2.5)污染特征及影响因素分析研究

主要利用连云港市环境监测中心站的大气环境自动监测平台的监测数据,对PM2.5质量浓度的变化特征以及与气象要素的关系分析。结果表明,连云港市的PM2.5质量浓度的变化特征基本上有明显的夏季与非夏季两种季节性特征。在夏季,PM2.5污染程度较轻,而在非夏季,PM2.5污染程度较重;风速与PM2.5质量浓度变化曲线几乎是负相关的。当风速大的时候,利于污染物的扩散;而风速小的时候,容易使得污染物浓度变大;PM2.5质量浓度变化曲线与温度的关系几乎呈现的是正相关性。气温的变化不总是反映空气质量的好坏情况,而逆温却易使污染物浓度升高;PM2.5质量浓度变化曲线与相对湿度的关系呈现的是正相关性;PM2.5质量浓度变化曲线与气压的关系在总体是呈负相关的。

Analysis on Pollution Characteristics and Influencing Factors of PM2.5 in Lianyungang

Using the automatic monitoring data of the atmospheric environment monitoring platform in Lianyungang Municipal Environmental Monitoring Center Station, this paper analyzed the variation characteristics of PM2.5 mass concentration and the re- lationships between meteorological factors. Results showed that PM2.5 mass concentration had two typical summer and non -sum- mer seasonal characteristics. PM2.5 mass concentration was low in summer and high in non -summer seasons. PM2.5 had negative correlation with wind speed. When the wind was stronger, it was helpful for the spread of pollutants. When the wind was weaker, it leads to higher PM2.5 mass concentration. PM2.5 had positive correlation with temperature. The changes of temperature could not always reflect the quality of the air, while inversion was easy to make the pollutant concentration higher. PM2.5 had positive corre- lation with relative humidity and negative correlation with pressure.