Abstract
Seasonal variability of the 24 hour concentration of coarse aerosol including particle sizes 1 to 10 μm (PM1-10) was assessed in Březno, a village near Chomutov. Aerosol particles were taken by use of a Personal Cascade Impactor Sioutas during three summer sampling campaigns (in the years 2008, 2009, and 2010) and two winter campaigns (2009 and 2010).
Statistically, the summer and winter campaigns were different. PM10 median was higher in winter campaigns (28.2 μg/m3) compared to summer periods (18.3 μg/m3).
In contrast, PM1-10 median was lower in winter (1.8 μg/m3). than in summer (4.7 μg/m3).. In summer with prevailing W to NW wind, the ratio of PM1-10 formed 36 % of PM10 in average and was not dependant on PM10 levels.
Compared to winter with prevailing E to SE wind, the ratio ofPM1-1O reached 2 to 25 % of PM10, while decreased with increasing PM10 levels.