University of Tehran Press Journal of the Earth and Space Physics 2538-371X 27 1 2001 03 21 - - 13320 FA Journal Article 1970 01 01 A computer program was developed to predict the dispersion of gaseous pollutant in the atmosphere. This program relies on puff method, and in order to consider the wind shear effects, the program has the ability to consider the complete dynamic and unsteady atmospheric conditions. Plume rise of hot pollutants due to buoyancy effects was also considered. The program has the ability to perform the real-time calculations and uses on-line data of atmospheric conditions that are measured directly. In order to consider the effects of the presence of buildings and other obstacles or sudden changes in surface roughness by the dispersion of released materials, a model was added to evaluate the dispersion coefficients in the wake of obstacles. Using this relatively complete simulation, we analyzed the effects of the above parameters on the dispersion of gaseous pollutants in the atmosphere. A computer program was developed to predict the dispersion of gaseous pollutant in the atmosphere. This program relies on puff method, and in order to consider the wind shear effects, the program has the ability to consider the complete dynamic and unsteady atmospheric conditions. Plume rise of hot pollutants due to buoyancy effects was also considered. The program has the ability to perform the real-time calculations and uses on-line data of atmospheric conditions that are measured directly. In order to consider the effects of the presence of buildings and other obstacles or sudden changes in surface roughness by the dispersion of released materials, a model was added to evaluate the dispersion coefficients in the wake of obstacles. Using this relatively complete simulation, we analyzed the effects of the above parameters on the dispersion of gaseous pollutants in the atmosphere. https://jesphys.ut.ac.ir/article_13320_3f08c5743211be193e5abe2ab2940f95.pdf