Evaluation temperature inversion on theAhvaz air pollution process

The slope of vertical temperature changes rise in height. This state of temperaturerise with height is called temperature inversion.Ahvaz is considered as one of the 7 major polluted cities in Iran.Intensification of the phenomenon of inversion leads to atmosphere stability andcongestion of pollutants in the lower layers of the earth’s surface. High density andcompression of cold heavy weather, just under warm weather with lower density,hinder vertical movements in the atmosphere. Surrounding heights and high rises inbig cities decrease horizontal wind movements and lead to concomitant intensificationof the temperature inversion layer and further pollutant compression inside the lowerlayers of the atmosphere.In this study we considered climate element data for 55 years ago and analysis earthsurface plans and 500 milibar surface in order to evaluation of temperature inversioneffect on Ahvaz pollution processing.The results of this study in indicate the maximum of intensity of temperatureinversion, weather stability in low pressure areas and high pressure upper air levelsduring the hot seasons. This thesis studies the parameters, regional factors andpollution processes in Ahvaz and attempts to find ways to control and reducepollutions. To this aim, it offers solutions and argues that observation and control ofthe gases and industry chimneys as well as planning the land use can play crucial rolesin decreasing pollution and moving in the direction of appropriate development.