عنوان مقاله [English]
In this study, the six main standard pollutants of Tehran's air -to -air measurable air, including: sulfur dioxide (SO2), carbon monoxide (CO), suspended particles (pm2.5 and pm10), nitrogen dioxide (NO2) and ozone gas (O3) During a predominantly 11 -year period from 2002 to 2012, a total of 4018 days has been used to analyze statistical analysis and to investigate the historical process of distribution of pollutants in Tehran. The methods used by this study are: Descriptive statistics, component analysis of time series, especially linear trends, polynide and exponentially, and my unparallery method has been used to significantly investigate the changes. Tehran showed that the SO2 trend with grade 3, CO with linear, NO2 with view and O3 with grade 2 share is better. The PM10 and PM2.5 trends did not show a significant and significant trend during the study period. The results of my Kendall test showed that the time changes for CO, NO2, O3 pollutants were significant with 95 % confidence distance, but the process of variability of CO pollutants and particles suspended pm2.5 was not significant. Therefore, given the historical trend of data used by Tehran air pollutants and their current continuity, it is expected that the NO2 pollutant will increase significantly in the future and continue to continue Tehran's air pollution. But if the release of CO air pollutants and suspended PM2.5 particles continues with the current routine, a significant decrease or increase in these pollutants is not expected, instead it is expected to continue the procedure and the current process of publishing two CO pollutants. O3 There is a significant decrease in the amount of gas emissions.