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This paper deals with the simulation of the NO x concentration over Douala for the period 2002-2006 by means of the American Meteorological Society (AMS)/Environmental Protection Agency (EPA) Regulatory Model (AERMOD) model, version 07026. Its sensitivity to local meteorological fields and land use parameters are investigated by selecting different buildings (receptors) specific direction and distance from the source and by making changes in land use parameters. Results reveal variations indoi:10.3390/atmos2040715 fatcat:mx3apxwkuvcnnbmdfxrdgxcvne