Opening Address.- Problems of Industrial Air Pollution Modelling Considering Soviet Experience.- Model Assessment And Policy Implications.- Developments in Modelling Air Pollution for Regulatory Uses.- Modeled Sulfur Deposition Trends since 1900 in North America.- The Impact of Emission Reductions on Mesoscale Acid Deposition in the Lower Ohio RiverValley.- Detection of Sulphur Emission Reductions in Europe during the Period 1979-1986.- A Quantitative Model Analysis of Year to Year Changes in Concentration and Deposition.- An Air Quality Forecast System for Photochemical Smog Episodes.- Analysis of Ozone Air Quality over the New York Metropolitan Area.- Regional Acid Deposition And Oxidant Modelling.- Delineation of the Influence of Major Emissions Regions on the Annual Acidic Deposition at Sensitive Areas.- Characterization of the Nonlinear Change in Annual Sulfur Deposition for a Change in Emissions.- Modelling Photochemical Pollution by an Eulerian Long-Range Transport Model.- Theoretical Prediction of Local Ozone Maxima Associated with the Passage of Cold Fronts.- Development of an Urban Grid Model for the Santiago, Chile Region.- The German Air Pollution Observation Network as a Base for the Validation of EURAD.- Routine Model for the Long-Range Transport Calculations of Sulphur and Nitrogen Compounds from Continuous Sources Allowing for Non-Linear Effects.- The Effect of Size-Dependent Dry Deposition Velocities in an Eulerian Regional-Scale Paniculate Model.- Simulation of a Wet Deposition Case in Europe Using the European Acid Deposition Model (EURAD).- Numerical Modelling of the Atmospheric Transport, Chemical Transformations and Deposition of Mercury.- Effects of Spatial Resolution on Tracer Field Simulations with an Eulerian Long-Range Transport Model (EURAD).- Estimation of the Annual Contribution of US Sulfur Emissions to Canadian Acidic Deposition and Vice Versa.- The Role of Grid-Based, Reactive Air Quality Modeling in Policy Perspectives and Implications, as Drawn from a Case Study.- The Scientific Credibility of Regional Atmospheric Deposition Models Used for Control Strategy Development.- Regional Scale Modelling.- Regional and Mesoscale Meteorological Modeling as Applied to Air Quality Studies.- Nocturnal Flow on a Western Colorado Slope.- Regional Flow Fields in Northrhine Westfalia - A Case Study Comparing Flow Models of Different Complexity.- Spatial Variations of Aerodynamic Resistance over a Hill.- Simulation of Dispersion in Moderately Complex Terrain.- Diagnostic Derivation of Boundary Layer Parameters from the Outputs of Atmospheric Models.- Long Range Transport of Heavy Metals from Poland Computed by an Eulerian Model.- Time Evolution of Breeze Circulation in Alpine Valleys.- Mesoscale Flow-Fields and Dispersion in the Coastal Terrain of Eastern Korinthian Gulf in Greece during Summer.- Meso-Meteorological Studies in the Iberian Peninsula and Western Mediterranean Area.- Flow and Particles Trajectories over Terrain Thermal Inhomogeneities.- Modeling Heavy Metals in Europe's A Combined Trajectory-Climatologic Approach.- Application of the Receptor Oriented Approach in Mesoscale Dispersion Modeling.- Eulerian Modeling of Atmospheric Dispersion over Background Concentrations and Emission Data Preparation.- Dry Aerosol Deposition Over the North Sea Estimated from Aircraft Measurements.- Temporal and Spatial Resolution Requirements for Regional-Scale Dispersion Models.- A Preliminary Evaluation of ADPIC Model Performance on Selected ANATEX Releases Using Observed, Analyzed, and Dynamically Predicted Winds.- The Influence of Biogenic Emissions Estimates on Ozone Precursor Control Requirements for Atlanta.- Specification of Source Characteristics for Ozone Prediction in a Complex Airshed.- Global Scale Dispersion Studies Including Sub-Grid Scale Parameterization Of Transport And Exchange Processes.- Parameterization of Cloud Transport of Trace Species in Global 3-D Models.-