New Developments in Emission Projection Methodologies

摘要

The paper describes the scope of an EPA research program to develop the EconomicGrowth Analysis System (EGAS) that will be operated to provide economic inputs for EPA's Regional Oxidant Model (ROM) and Urban Airshed Model (UAM). The Clean Air Act requires states to reduce ozone atmospheric concentrations in areas exceeding the primary ambient standard of 0.120 ppm, and to model their future ozone concentrations to demonstrate the effectiveness of their control programs to attain the primary standard. To assist state and local agency authorities in preparing these ozone projections, EPA has sponsored the development of the UAM, an atmospheric chemistry model, and has published guidance on its operation and use by state and local authorities. The UAM requires boundary conditions, which include the amount of pollutants crossing the boundaries of the area being modeled. Boundary conditions will be supplied from the operation of the ROM. The emissions preprocessor modules for UAM and ROM require various model input parameters for the projection of emissions, including anticipated future year economic activities for all pollutant source categories in the area being modeled. To fulfill the need, EPA has initiated a research program to produce a system (EGAS) for supplying default economic activity inputs in a format usable by UAM and ROM.