2017年南昌市颗粒物污染特征研究

Research on Characteristics of Particulate Matter Pollution in Nanchang City in 2017

南昌市颗粒物污染相对较为严重、污染成因研究不充分。利用国控点地面观测数据和气象地面观测资料,分析了2017年南昌市大气污染特征、颗粒物浓度与气象条件的相关性及典型颗粒物污染过程。结果表明:2017年南昌市夏季空气质量最好,冬季空气质量最差;颗粒物与温度、湿度均呈现负相关关系,颗粒物污染浓度随着温度、湿度的升高而降低;典型污染过程分析显示,短时的风速降低会造成对应时段颗粒物浓度累积上升,外来传输主要来自安徽、浙江、江苏省等地,外部污染输入对本地颗粒物污染有一定的贡献。结果可作为南昌市颗粒物污染治理管控的依据。

Particulate matter pollution in Nanchang is relatively serious,and the research on the causes of pollution is insufficient.Based on the ground observation data of national control points and meteorological ground observation data,the characteristics of air pollution in Nanchang City in 2017,the correlation between the concentration of particulate matter and meteorological conditions,and the typical particulate matter pollution process were analyzed.The results showed that the air quality was the best in summer and the worst in winter in Nanchang in 2017 There was a negative correlation between particulate matter and temperature and humidity,the concentration of particulate matter pollution decreased with the increase of temperature and humidity.The analysis of typical pollution process showed that the short-term decrease of wind speed will cause the increase of particle concentration in the corresponding period,the external transmission mainly comes from Anhui,Zhejiang and Jiangsu provinces,and the external pollution input has a certain contribution to the local particulate pollution.The results can be used as the basis for the control of particulate pollution in Nanchang.