Application of a coupled prognostic model to turbulence and dispersion in light-wind stable conditions, with an analytical correction to vertically resolve concentrations near the surface

► A prognostic model, TAPM, is applied to dispersion in light-wind stable conditions. ► The model underestimates observed concentrations and horizontal turbulence. ► A modification to the turbulent kinetic energy boundary condition is proposed. ► A new analytical scheme resolves concentrations below the first model level. ► A remarkable improvement in the predicted concentrations is obtained.