REGIONAL-SCALE TRANSPORT MODEL FOR AMMONIA AND AMMONIUM

A regional scale operational model for the simulation of air and precipitation quality originating from ammonia is presented. The aim of the simulation is to determine, quantitatively, the complex effects of the following: emission density of ammonia, wind pattern in the transport layer, mixed-layer height, precipitation conditions, transformation, dry and wet deposition, and hemispheric background value. The model estimates annual average concentrations and yearly depositions for ammonia species in rural areas of the country. Results were validated against 1 year of data measured at regional pollution stations in Hungary. The computed values agreed well with the measurements.