伊宁市细颗粒物输送路径及潜在源区分析

Transportation Routes and Potential Source Areas of Fine Particulate Matter in Yining

基于污染物自动监测数据及全球资料同化系统气象数据(GDAS),分析伊宁市细颗粒物(PM_(2.5))浓度变化特征及不同季节下外来传输路径,结合潜在源贡献因子法(PSCF)和浓度权重轨迹法(CWT)分析潜在源和浓度贡献区。结果表明:伊宁市空气质量主要受汽车尾气源为主,冬季PM_(2.5)污染最严重;春、夏、秋季伊宁市周边不存在明显潜在污染源贡献区,冬季PM_(2.5)潜在源区为琼博拉镇与海努克镇区域,贡献源区分布在特克舍山地区。

Based on the automatic pollutant monitoring data and GDAS meteorological data,the variation characteristics of fine particulate matter(PM_(2.5))concentrations in Yining City and the external transport paths under different seasons were analyzed,combined with the potential source contribution factor(PSCF)and concentration weight trajectory(CWT)methods to analyze the potential sources and concentration contribution areas.The results showed that the air quality of Yining City was mainly dominated by vehicle exhaust sources,and PM_(2.5) pollution was most serious in winter,there were no obvious potential source contribution areas around Yining City in spring,summer and autumn,and the potential source area of PM_(2.5) in winter was the area of Jombola and Hainuk towns,and the contributing source areas were distributed in the area of Tkeshe Mountain.