2001—2010年重庆主城区空气质量变化趋势

Study on Air Quality Change Trend in Chongqing Downtown Area in the Last Ten Years

通过对重庆市主城区2001—2010年10a间空气污染指数统计分析,研究了空气环境质量的年际、月际变化。结果显示:重庆市主城区空气质量状况逐年转好,空气污染重点控制时段应以秋冬季节为主,以1、2、3、11、12月为重点;空气首要污染因子以可吸入颗粒物为主,以SO2为辅,可吸入颗粒物应全年加强控制,SO2污染重点控制月份以1、4、7、8、11月为主;从API指数来看,易反弹天数全年分布较为均匀,但临界优良天数较集中分布在1、2、3、11、12月份,应作为重点治理时段。

the air pollution index(API) statistic data was analyzed to study the annual and monthly changes of the air quality,a case studied was carried out in Chongqing Downtown Area(CQDA) during 2001 to 2010.The results showed that air quality was getting better year by year in CQDA;the main air pollution control time should be focused on autumn and winter including January,February,March,November and December.The main air pollution factor,PM10 should be controlled all the year around;SO2 should be controlled in January,April,July,August and November.According to the API data,the most likely rebound days are distributed evenly all the year around.While the critical days,the main governance time is relatively distributed in January,February,March,November,December.