Particle and Aerosol Research Vol. 9, No. 2, June 2013 |
ISSN : 1738-8716 (Print) ISSN : 2287-8130 (Online) |
Change of the Size-Resolved Aerosol Concentration Due to Relative Humidity
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Abstracts
Abstract
In this study, the atmospheric aerosol concentration measured at different relative humidity levels was analyzed. Using an optical particle counter, PM10 and PM2.5 concentration as well as particle size distribution were measured and the relation between these size resolved data and relative humidity was studied.
The results showed that mass concentration increases as relative humidity increases. The comparison between PM1, PM2.5 and PM10 showed that the fine particles grow more than coarse particles as relative humidity increases. The results also showed that PM10-2.5 and relative humidity do not show close correlation, which means that the mass increase of PM10 at high relative humidity is mainly due to the growth of PM2.5.
Keywords£ºAtmospheric aerosol, PM10 and PM2.5 concentration, Relative humidity, Particle growth, Optical particle counter, Aerosol optical property
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