Research of pollutants extinction characteristic in Hangzhou

doi:10.7523/j.issn.2095-6134.2014.03.010

Abstract

Abstract:

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

CLC Number:

X513

HONG Shengmao, XU Chang, SHEN Jiandong, JIAO Li, HE Xi, YANG Le, SUN Hongliang, XU Hong, YE Xianman, ZHANG Tian, HE Jiping, YAO Han. Research of pollutants extinction characteristic in Hangzhou[J]. , 2014, 31(3): 360-366.

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