title: [Effect of meteorological factors on the 3,4-benzpyrene concentrations in the ground air layer in the region of the city of Sofia].
abstract: An investigation is performed to determine 3,4-benzpyrene content in the Sofia area (in a single spot), covering a one-year period (1970), on the basis of mean monthly concentrations established through gas chromatography, and compared to some of the averaged meteorologic data. The correlation between 3,4-benzpyrene concentrations and some meteorologic factors found is corroborated by the clearcut seasonal fluctuations of 3,4-benzpyrene concentrations in the atmospheric air. An inversely proportional dependence is established of 3,4-benzpyrene concentration to the summed up radiation, and directly proportional--to the dust amount. A rise of 3,4-benzpyrene concentration under conditions of the various types of temperature inversions, and a complex effect of meteorologic factors have been also noted. Moreover, an attempt is made at establishing the washing effect of rainfalls, and it has been found that up to a certain extent, such an effect really exists. The study performed shows in a clearcut manner that 3,4-benzpyrene content is considerably influenced by a variety of meteorologic factors.
mesh_terms: D000393:Air Pollutants; D001580:Benzopyrenes / Q000032:analysis*; D002031:Bulgaria; D007220:Industrial Waste; D008685:Meteorological Concepts
chemical_list: D000393:Air Pollutants; D001580:Benzopyrenes; D007220:Industrial Waste
vernacular_title: Izsledvane vliianieto na meteorologichnite faktori vurkhu kontsentratsiite na 3,4-benzpiren v prizemniia vuzdushen sloĭ v raĭona na gr. Sofiia.