摘要：The city of Dakar is located in the Sahelian zone on average latitude at the western limit of the African continent and the Atlantic Ocean. Traffic in the lower troposphere is dominated by three air currents: The maritime trade wind, the harmattan and the monsoon. Particulate aerosol pollution is combined with increasing chemical pollution due mainly to the emission of gaseous pollutants by car traffic. Our study focuses on the contribution of mineral pollutants such as nitrogen oxides (NOx) and carbon monoxide (CO) emitted by automobile traffic in the general conditions of atmospheric circulation, in the pollution of urban air. The variations in their concentration flux as a function of meteorological parameters made it possible to evaluate the air quality in the Senegalese capital, which represents only 0.3% of the national territory but concentrates 24% of the population and the heaviest urban transport (72% of the car fleet).
关键词：Pollution; Mineral pollutants; Pollutant flow; Automobile traffic; Air flow; Air quality
