Determination of O3, NO2, SO2, CO and PM10 measured in Belgrade urban area

O3, NO2, SO2, CO and PM10 concentrations, simultaneously determined for the first time in Belgrade urban area in the autumnal period of 2005, are presented. The obtained results display similar behaviour of SO2, NO2, CO, PM10 opposite from that of O3. The weekend effect was also investigated showing diminution of average daily concentrations of SO2, NO2, PM10 and CO for 72, 40, 37 and 42% respectively, and increase of the average daily concentration of O3 for 56%. Influence of meteorological conditions on observed concentration levels was studied, too. The observed influence of wind speed on the O3 nightly concentration levels was analyzed pointing to the phenomena of O3 transport during episodic measurements. To make an identification of possible pollution sources and analyse the influence of meteorological parameters on pollution levels, air back trajectories for high level concentrations episodes were calculated and analysed. A multivariate receptor modelling (Principal Component Analysis, Cluster Analysis) has been applied to a set of data in order to determine the contribution of different sources. It was found that the main principal components, extracted from the air pollution data, were related to gasoline combustion, oil combustion and ozone transport.