Akademik Veri Yönetim Sistemi
FRESENIUS ENVIRONMENTAL BULLETIN, cilt.20, sa.10, ss.2526-2533, 2011 (SCI-Expanded)
Ozone and nitrogen dioxide concentrations which are secondary pollutants were determined during 12 weeks. The measurements were weekly performed at 14 sampling points located in Erzurum city by using passive samplers. The mean O-3 and NO2 concentrations during sampling period were found as 61.1 +/- 11.3 and 13.9 +/- 8.1 mu g/m(3), respectively. These values generally lie below the air quality standards recommended by the National Ambient Air Quality Regulation. The seasonal variations showed a maximum O-3 concentration during summer while NO2 level had a maxima in winter. The highest value of ozone and the lowest value of nitrogen dioxide were obtained in rural areas where vehicular traffic is lower. The influence of meteorological conditions on O-3 and NO2 concentrations were also investigated. Ozone showed negative correlation with pressure and relative humidity, and positive correlation with sunshine duration, temperature and wind speed. However, nitrogen dioxide had positive correlation with pressure and relative humidity and negative correlation with other meteorological parameters. The inverse relation between O-3 and NO2 levels was observed as it seen in previous studies. The significant impact factors for ozone were found as sunshine duration, temperature, wind speed and pressure.