Influence of meteorological parameters on the dynamics of ozone and aerosol particles near a road transport street

Abstract

Car transport is one of the potential ozone precursors and the source of aerosol particulate emissions. Since the number of cars on the streets increases with each passing year, it is evident that urban pollution caused by mobile sources of pollution is also respectively increasing. Therefore, it is very important to observe the dynamics of car transport emissions and to be aware of how meteorological conditions infuence the formation of these emissions. The cumulative impact of ozone and aerosol particles is signifcantly stronger than that of each pollutant eparately; therefore, it is important to fnd out the synoptic conditions which are least favourable for their formation in order to ensure good health of people living close to heavily trafcked streets. The experiment was carried out during the winter season near the heavily trafcked street by observing variations in ozone concentration and fne 0.4 μm aerosol particles and estimating the infuence of meteorological parameters on these changes. It has been found that the intensity of road transport and meteorological parameters (particularly pressure and environmental temperatures) play an important role for the dynamics of ozone and aerosol particles. The research on aerosol size distribution has shown that the formation of fne particles is more intensive than that of larger particles near a heavily trafcked street. It has been found that the number concentration of 0.4–0.8 μm particles is 80 times higher than that of 0.9–7.0 μm particles.