Incorporation of detailed chemistry into a three-dimensional Lagrangian-Eulerian hybrid model: application to regional tropospheric ozone

During the last 20 years a variety of models have been developed to study t he transport, transformation and deposition of pollutants on the regional s cale. Different levels of complexity have been considered to depict these p henomena. The representation of the chemical transformations has been one o f the most challenging tasks. A detailed non-linear Eulerian chemistry modu le (CheM) has here been added to the hybrid single-particle Lagrangian inte grated trajectory (HY-SPLIT) model. The model is applied to analyze changes in hourly averaged ozone concentration over the period of 8-12 July 1996. Comparisons between simulation results and measurements from 11 monitoring stations throughout Pennsylvania show that hybrid Lagrangian-Eulerian model ing techniques are promising and may be useful for predicting air quality v ariables in general. (C) 2000 Elsevier Science Ltd. All rights reserved.