Evaluation of air quality variability in Timișoara, Romania

This study presents the evaluation and analysis of air pollution levels in Timișoara, Romania, regarding the main air pollutants. We examined diurnal, monthly and seasonal variations, using datasets of measurements from the four existing fixed air quality monitoring stations in Timișoara. The results show that the station TM-1, located in the south of the city, has overall much higher values that the other stations. All pollutants except for ozone show peaks in the diurnal variation in the morning and late in the afternoon, which can be correlated to the traffic rush hours, and fall and winter dominance in the seasonal variation. Ozone variation follows the chemistry of its formation, showing proportional increases with the increase of sunlight and ultraviolet radiation.