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UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS Guest
2024-11-22 2:17 |
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Conference: Bucharest University Faculty of Physics 2007 Meeting
Section: Atmosphere and Earth Science; Environment Protection
Title:
The spatial and temporal variability of pollutant concentrations in urban atmosphere
Authors:
Cristina Raicu(1), Sabina Stefan(2)
Affiliation:
(1) National Research-Development Institute for Environmental Protection – Bucharest, Romania
(2) University of Bucharest, Faculty of Physics, Dept. of Atmospheric Physics, P.O.BOX MG-11, Bucharest, Romania
E-mail
cristina.raicu@fizica.unibuc.ro
Keywords:
pollutants, spatial and temporal variability, traffic, meteorological conditions
Abstract:
The aim of this paper is to assess the concentration levels of NOx, CO and PM10 in a few urban sites in Bucharest, Romania. The key influences on the causes of high concentrations of pollutants include traffic characteristics but also meteorology, which affects the dispersion of emissions. Therefore, the analysis of the measured concentrations was related to traffic and meteorological conditions. The direct contribution of the traffic relative to the contribution from urban background was studied. The study has been performed for the all the four seasons: winter, spring, summer and autumn. The measurements shown that the highest NOx, CO and particulate matter (PM10) concentrations occur in the winter and summer periods, due to unfavorable meteorological dispersion conditions. Generally, the results show that the road traffic is the main contributor when the NOx and CO values exceed the limit value. For the PM10 both the traffic and resuspension of road dust are important. This type of study of spatial and temporal variability of pollutant concentrations allows evaluating the requirements of air quality models to represent the key effects.
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