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ENAMAP-1A LONG TERM AIR POLLUTION MODEL: REFINEMENT OF TRANSFORMATION AND DEPOSITION MECHANISMS
Citation:
Endlich, R., C. Bhumralkar, R. Brodzinsky, K. Nitz, AND B. Cantrell. ENAMAP-1A LONG TERM AIR POLLUTION MODEL: REFINEMENT OF TRANSFORMATION AND DEPOSITION MECHANISMS. U.S. Environmental Protection Agency, Washington, D.C., EPA/600/D-82/351 (NTIS PB83140731), 1982.
Description:
This paper is concerned with the long-range transport of air pollution over eastern North America. Using standard weather reports and several SOx emission data inventories, the ENAMAP model computes the airborne concentrations of SO2 and SO4 and their deposition on the earth's surface. The newest version of the model (ENAMAP-1B) includes the influences of smoothed terrain on the winds and divides the atmospheric boundary layer into three parts. This treatment allows pollution emissions to be divided among layers. The model has been used to compute monthly average values of concentration and deposition for January and August 1977. Comparisons with air quality measurements show that calculated SO2 concentrations are reasonably accurate, but SO4 concentrations are generally too high. Further tuning of the model is required to optimize its performance. A version of the model applicable to NOx emissions is currently being tested.