杭州市区污染物消光特性研究  

Research of pollutants extinction characteristic in Hangzhou

作　　者：洪盛茂[1] 徐昶[1] 沈建东[1] 焦荔[1] 何曦[1] 杨乐[1] 孙鸿良[1] 徐鸿[1] 叶贤满[1] 张天[1] 何纪平[1] 姚晗[1] 

机构地区：[1]杭州市环境监测中心站,杭州310007

出　　处：《中国科学院大学学报（中英文）》2014年第3期360-366,共7页Journal of University of Chinese Academy of Sciences

基　　金：杭州市重大科技创新项目(20092113A05);浙江省重大科技专项重点社会发展项目(2011C13022)资助

摘　　要：利用美国IMPROVE能见度公式,分析2011年6月至2012年5月杭州大气复合污染综合监测数据,研究污染物的消光特征,确定首要消光物质.研究结果表明,随着能见度降低,污染物消光系数在大气总消光系数中的比例逐渐减少,从10 km处的85%左右降低到2 km以下的22%左右.与10 km处相比,2 km处的NO-3和SO2-4消光系数分别增长3.43倍和2.15倍.杭州污染物质的消光系数具有非常明显的季节变化和日变化特征,硝酸盐表现为夏季较低,冬季较高;硫酸盐表现为秋季高,其他3季相对较低.Using the visibility formula of IMPROVE, the data of atmospheric complex pollution monitoring system in Hangzhou from July 2011 to June 2012 was analysed. The primary extinction material was determined. The results showed that the ratio of pollutant extinction coefficient to atmospheric total extinction coefficient decreased when the visibility decreased, and the ratio decreased from 85% at 10 km to 22% at below 2 kin. The extinction coefficients of nitrate and sulfate at below 2 km were 4.43 and 3.15 times of those at 10 kin, respectively. The extinction coefficients of main pollutants in Hangzhou showed very signifieant seasonal variation and daily variation. The extinction coefficient of nitrate was lower in summer and autumn and higher in winter and spring, while the extinction coefficient of sulfate was higher in autumn and lower in the other seasons.

关 键 词：能见度 大气复合污染 消光系数 硝酸盐 硫酸盐 

分 类 号：X513[环境科学与工程—环境工程]