Explaining the Effects of Climate Elements in Tehran’s Metropolis Air Quality

Introduction and Background: Atmospheric pollutants are elements whose high concentrations cause damage to the Earth’s biological cycles, and its concentration is usually determined by concentrations of air pollutants such as nitrogen dioxide, sulfur dioxide, carbon monoxide, ozone and suspended particles. Air pollutants have changed the composition of air and affect the air quality of local, regional and global climate. Air quality is strongly influenced by climatic conditions, topography, automobiles and industries, transportation system and the type and amount of pollutants. The purpose of this study is to investigate the direct and indirect effects of climate elements on the quality and pollution of Tehran metropolitan air. The research method is quantitative-analytical and the data also includes selected meteorological parameters and air pollution in Tehran. The path analysis method was used to study the effects of climate elements on air quality in Tehran metropolis. This method investigates the causal relations of direct and indirect effects and the total effect of each of the independent variables on dependent variables which is Tehran air quality and interprets the relationships and correlations observed between them. In the process of analyzing the path, a theoretical diagram based on the possible effects of variables relative to each other wll be considered as the initial assumption, and then after the path analysis, variables affecting the final graph of the path are specified and interpreted. The results of the research have shown that, given the wide and important performance of meteorological data in this study, we must consider the meteorological factor as a decisive parameter that has great control over many other factors affecting the air quality of Tehran. This factor has played a significant role in both direct and indirect effects on Tehran’s air quality.