Atmospheric Dispersion of Heavy Gases and Small Particles.- Dispersion of a Stack Plume Heavier than Air.- Inclusion of Particles in Second-Order Modeling of the Atmospheric Surface Mixed Layer.- Experimental Observations of Entrainment Rates in Dense Gas Dispersion Tests.- Entrainment in Gravity Currents.- The Incorporation of Wind Shear Effects into Box Models of Heavy Gas Dispersion.- Gravity Spreading and Turbulent Dispersion of Pressurized Releases Containing Aerosols.- Simulations and Parameter Variation Studies of Heavy Gas Dispersion Using the Slab Model Condensed.- Application of Advanced Turbulence Models in Determining the Structure and Dispersion of Heavy Gas Clouds.- Recent Results in Simulating LNG Vapor Dispersion over Variable Terrain.- On the Dilution of a Dense Gas Plume: Investigation of the Effect of Surface Mounted Obstacles.- Large Scale Experiments on the Dispersion of Heavy Gas Clouds.- Improved Understanding of Heavy Gas Dispersion and its Modelling.- Effects of a Spill of LNG on Mean Flow and Turbulence under Low Wind Speed, Slightly Stable Atmospheric Conditions.- Temperature Measurements in a Negatively Buoyant Round Vertical Jet Issued in a Horizontal Crossflow.- Gravity Spreading and Air Entrainment by Heavy Gases Instantaneously Released in a Calm Atmosphere.- A Wind Tunnel Model of the Porton Dense Gas Spill Field Trials.- Modelling of Heavy Gas Plumes in a Water Channel.- The Entrainment of Small Particles by a Turbulent Spot.- On a Model for the Turbulent Re-Entrainment of Small Particles.- Observations on the Current Status of Field Experimentation on Heavy Gas Dispersion.- A Probabilistic Model for Dosage.- Maplin Sands Experiments 1980: Interpretation and Modelling of Liquefied Gas Spills onto the Sea.- Monitoring the AtmosphericDiffusion of Puffs and Plumes with Bipolar Space Charge at Small Scale in Wind Tunnels.- Experimental and Theoretical Studies in Heavy Gas Dispersion. Part I. Experiments.- Water Channel Tests of Dense l/