Seasonal Variability of Resuspension

• Published in: MATEC web of conferences 2022, Vol.369, p.2009
• Main Authors: Linda, Jakub, Köbölová, Klaudia, Uhlík, Ondřej, Pospíšil, Jiří, Apeltauer, Tomáš
• Format: Article
• Language: English
• Subjects: health risk assessment; particulate matter; rdd; road dust
• ISSN: 2261-236X; 2261-236X
• DOI: 10.1051/matecconf/202236902009

Particulate air pollution in cities is caused by a variety of sources. One of the less-studied contributors is wind-induced particle resuspension. As the wind speed increases, particles are removed from surfaces. These particles cause an increase in the total concentration in the air. It is known that particles of 10-2.5 μm in size can be resuspended (PM 10-2,5 ). Modern emission monitoring in cities also allows the monitoring of fine particles of 10, 2.5 and 1 μm in size. The size fractions can then be sorted into PM 10-2,5 , PM 2,5-1 and PM 1 . When breathed in, particles of different sizes cause various serious health risks. This paper focuses on the identification of the resuspension process of different particle size fractions by a data processing method. Data measured by automatic emission monitoring are used. It is confirmed that the concentration increase can be dominated by the fraction PM 10-2,5 . However, a concentration increase of fractions PM 2,5-1 and PM 1 is also evident with increasing wind speed. Although the increase in the PM 1 fraction is smaller than PM 10-2,5 , it is more severe due to the respiratory deposition dose. The resuspension of particles of different fractions has different behaviours during the year. PM 10-2,5 particles are dominantly resuspended in the summer months. In winter, on the other hand, the proportion of PM 2.5-1 and PM 1 particles increases, which may be related to the heating season