收稿日期: 2013-03-11
修回日期: 2013-11-15
网络出版日期: 2014-05-15
基金资助
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
Research of pollutants extinction characteristic in Hangzhou
Received date: 2013-03-11
Revised date: 2013-11-15
Online published: 2014-05-15
洪盛茂 , 徐昶 , 沈建东 , 焦荔 , 何曦 , 杨乐 , 孙鸿良 , 徐鸿 , 叶贤满 , 张天 , 何纪平 , 姚晗 . 杭州市区污染物消光特性研究[J]. 中国科学院大学学报, 2014 , 31(3) : 360 -366 . DOI: 10.7523/j.issn.2095-6134.2014.03.010
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 km. The extinction coefficients of nitrate and sulfate at below 2 km were 4.43 and 3.15 times of those at 10 km, respectively. The extinction coefficients of main pollutants in Hangzhou showed very significant 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.
Key words： visibility; air combined pollution; extinction coefficient; nitrate; sulfate
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