2005-2014年川南城市群大气污染的时间演变特征

摘要

Based on monitoring datum of ambient air quality including SO2,NO2 and PM10 from 2005 to 2014 in five core cities of the Urban Agglomeration in Southern Sichuan,the time characteristics and change law of the three main air pollutants were analyzed,and the changing trends of them were described and discussed.The results showed that the annual average values of PM10 mass concentrations and API index exhibited a downward trend in the five cities;PM10 was the main air pollutant of the area related to their ambient air quality.In addition,the annual average values of NO2 mass concentrations showed a rising trend in the five regional cities.With the exception of Leshan city,the decreased trends of annual average values of SO2 mass concentrations were observed in the other four cities.%基于2005-2014年PM10、SO2及NO2的环境空气质量监测数据,研究了川南城市群5个地级市(乐山、泸州、内江、宜宾、自贡)三类主要大气污染物的时间特征及变化规律.结果表明:5个城市的PM10年均质量浓度和API年均值均呈波动性下降趋势,PM10是影响各城市环境空气质量的主要污染物.各城市NO2年均质量浓度以上升趋势为主,SO2年均质量浓度除乐山有明显上升趋势外,其余城市以下降趋势为主.