Abstract
The aim of the study is to analyse how traffic modifies air quality at Szeged, Southern Hungary. Measurement of air pollutants (CO, NO, NO2, NOx, SO2, O3 and PM) is performed by a monitoring station in the downtown. Annual, summer and winter half-year averages of SO2/CO, NOx/CO, NO/NO2, PM/CO ratios and those of CO between 1997 and 1999 are calculated. Furthermore, air quality differences between Saturday and weekday (Saturday − weekday), holiday and weekday (holiday − weekday) as well as holiday + Saturday and weekday [(holiday + Saturday) − weekday] are computed. Temporal course of daily averages for CO, NO and NO2 concentrations in every 30 minutes are shown on weekdays, Saturdays as well as on Sundays and holidays. Whole-day traffic census is made at the junction in clear weather. Diurnal course of CO, NO, NO2 and O3 concentrations as well as that of wind speed and wind direction in every 30 minutes is shown on the day of the traffic census. Relation between traffic and CO concentrations on the day of the traffic census is also presented.
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