Zpravodaj Hnědé uhlí 2011, 51(4):49-55

Sezónní variabilita hrubého aerosolu (> 1μm) v obci Březno u Chomutova

Mgr. Petra Pokorná, RNDr. Jan Hovorka, Ph.D., Mgr. Michal Grégr, Ing. Jiří Kroužek
Ústav pro životní prostředí

V obci Březno u Chomutova byla vyhodnocována sezónní variabilita 24hodinové koncentrace hrubé frakce aerosolu o velikosti částic 1-10 μm (PM1-10) odebírané osobním kaskádovým impaktorem Sioutas po dobu tří letních kampaní (2008, 2009 a 2010) a dvou zimních kampaní (2009 a 2010). Zimní a letní kampaně se od sebe statisticky liší. Medián PM10 byl pro zimní období vyšší (28,2 μg/m3) než pro období letní (18,3 μg/m3). Naopak medián PM1-10 byl v zimě nižší (1,8 μg/m3) než v létě (4,7 μg/m3). V létě, při převládajícím Z až SZ větru, činil podíl PM1-10 v průměru 36 % PM10 a nezávisel na koncentraci PM10. Naopak v zimě, při převládajícím V až JV větru, se podíl PM1-10 pohyboval v rozsahu 2-25 % PM10, přičemž s rostoucí koncentrací PM10 klesal.

Keywords: PM10, PM1-10, osobní kaskádový impaktor Sioutas, poletavý prach, kvalita ovzduší venkova

Seasonal variability of coarse aerosol (> 1μm) in Březno near Chomutov

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. PM10median 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 of PM1-10 reached 2 to 25 % of PM10, while decreased with increasing PM10 levels.

Keywords: PM10, PM1-10, Sioutas personal cascade impactor, airborne dust, rural ambient air quality

Published: December 1, 2011  Show citation

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Pokorná, P., Hovorka, J., Grégr, M., & Kroužek, J. (2011). Seasonal variability of coarse aerosol (> 1μm) in Březno near Chomutov. Zpravodaj Hnědé uhlí, 51(4), 49-55
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