泸州市城区空气质量时空变化分析

为了掌握泸州市城区近年空气质量时空变化,对泸州市城区2004-2009年空气质量监测数据进行系统分析。结果表明,近年来泸州市城区空气质量总体良好,平均空气污染指数为80,空气质量优良率在72.33%以上。空气质量有逐步好转的趋势,SO2和PM10年平均浓度明显下降,分别从0.110 mg/m3、0.120 mg/m3下降到0.058 mg/m3、0.070 mg/m3;NO2略有上升,从0.029 mg/m3上升到0.040 mg/m3。污染物浓度时空分布不均,SO2与PM10夏季浓度较低,冬季较高,NO2浓度季节性变化不明显;兰田宪桥、小市上码头污染物浓度总体上高于忠山环监站。

Temporal and Spatial Variation of Urban Air Quality in Luzhou City

2004-2009 urban air quality monitoring data in Luzhou city was analyzed to find out the changing trends.The result shows that the air quality in Luzhou city in the past 6 years was good,the average air pollution index was 80 and the number of days more than second air quality standard occupied 72.33%.The air quality became better gradually.Especially,the average concentration of SO2（from 0.110mg/m3 to 0.058mg/m3）and PM10（from 0.120mg/m3 to 0.070mg/m3）dropped obviously as well as that of NO2（from 0.029mg/m3 to 0.040mg/m3） increased a little.The distributions of these air pollutants varied with time and space.The average concentration of SO2 and PM10 was lower in summer than in winter;the seasonal character of NO2 was not obvious.The average concentrations of these air pollutants at Lantianxianqiao and Xiaoshishangmatou stations were higher than those at the Zhongshan station.