Abstract
PM2.5 and VOCs (benzene, toluene, m-p-o-xylenes) concentrations were measured in an urban and a suburban site in Athens, Greece, during the period between April and November 2004. This period, which is considered to be the warmer period in Greece, is characterized by the development of sea-breeze over the Attica Basin. Additionally strong Northern, North-eastern winds called “The Etesians” predominate during the summer months (July–August), acting positively to the dispersion of pollutants. In this campaign, 24 days with sea-breeze development were observed, 15 days with northern winds, 6 days with southern winds while the rest of the days presented no specific wind profile. Maximum concentrations of PM2.5, VOCs and nitrogen oxides, were detected during the days with sea-breeze, while minimum concentrations during the days with northern winds. Ozone was the only pollutant that appeared to have higher concentrations in the background site and not in the city centre, where benzene presented strong negative correlation with ozone, indicating the photochemical reaction of hydrocarbons that lead to the ozone formation. The BTX ratios were similar for both sites and wind profiles, indicating common sources for those pollutants. T/B ratio ranged in low levels, between 3–5 for site A and 2–5 for site B, suggesting vehicles emissions as the main sources of volatile compounds. Finally, the strong correlations of PM2.5 and benzene concentrations, between the two sampling sites, indicate that both the city centre and the background site, are affected by the same sources, under common meteorological conditions (sea-breeze, northern winds).
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Giakoumi, A., Maggos, T., Michopoulos, J. et al. PM2.5 and volatile organic compounds (VOCs) in ambient air: a focus on the effect of meteorology. Environ Monit Assess 152, 83–95 (2009). https://doi.org/10.1007/s10661-008-0298-2
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DOI: https://doi.org/10.1007/s10661-008-0298-2