A Survey on the Trend of Air Pollutants in Smog Formation in Tehran City

Many countries are facing with the problems of increasing trend of the air pollutant impacts, which are resulted from pollutant dispersing activities in the atmosphere. Photochemical smog also has the most dangerous destroying impacts in the atmosphere. Through this situation the pollutants spread rapidly under the sunlight, and produce a big variety of dangerous chemical complexes, affecting the environment. We have tried to survey the relation of variables for smog formation in the city through the “Pearson” formula to calculate the integration coefficient. Deductive statistical methods like integration coefficient and linear equilibrium of regression, to were used find the logic relation of the variables like air pollutants, and inversion. Air maps in the contour line of 250, 500 hpa and the statistical duration of (1998-2007) were studied monthly in smoggy days. As a result' the relationship between these pollutants and the process of the smog formation was estimated to be more than 90%, and it increases according to the cold air flows, inversion, and it‘s low height from the earth surface.