重庆主城区冬春季降水强度对大气污染物影响  

On Impact of Precipitation Intensity of Air Pollutants in Winter and Spring in Chongqing Downtown

作　　者：陈小敏[1] 邹倩 周国兵[3] 

机构地区：[1]重庆市人工影响天气办公室,重庆401147 [2]重庆市气象台,重庆401147 [3]重庆市气象局,重庆401147

出　　处：《西南师范大学学报（自然科学版）》2013年第7期113-121,共9页Journal of Southwest China Normal University(Natural Science Edition)

基　　金：重庆市气象局科技攻关项目(ywgg-201207)

摘　　要：利用重庆主城区2004-2008年1-3月和11-12月的日平均降水资料和空气污染资料,分析了重庆主城区大气污染物浓度分布和不同等级降水对污染物浓度清除能力,结果表明:当降雨量在5mm以上时,大气污染物浓度明显减少,且大气污染物浓度随雨量增加而增加,但污染物下降幅度与雨量增加幅度的对应关系一般.连续降水的第1天和第2天有较好的湿清除能力,第3天和第4天湿清除能力较差.雨量在1～9.9mm区间,每增加1mm降水对大气污染物的清除率变化最大,10～15mm区间,每增加1mm降水清除率变化最小,几乎没有增加.15mm以上,每增加1mm降水,清除率变化增加.With the daily average data of precipitation and environmental monitoring in Jan-Mar and Nov- Dec from 2004 to 2008 in Chongqing downtown, studies have been made on concentration distribution of air pollution and scavenging activity in different levels of precipitation intensity. The results show that, when rainfall is above 5mm, air pollutant concentrations wilt be clearly reduced, with the decline rate in- creasing with rainfall, except that the correspondence between them is general. In continuing precipitation days, air pollutant concentrations are reduced significantly in the first and second day, but reduced poorly in the third and fourth day. In the 1--9.9 mm range of precipitation intensity, the clearance rate of air pol- lutants with each additional 1 mm is the greatest, in the range of 10--15 mm, and clearance rate is almost no increase with each additional 1 ram, when precipitation Intensity above 15 mm, clearance rate will in- crease with each additional 1 mm.

关 键 词：降水强度 大气污染物 清除效率 

分 类 号：X51[环境科学与工程—环境工程] P468.024[天文地球—大气科学及气象学]