numerical models


GLOBO is a grid-point hydrostatic general circulation model on a uniform mesh in geographic coordinates. GLOBO was developed as an evolution of BOLAM, with the same numerics for the dynamical part and the same physical parameterizations.


MILORD is a 3-D long-range Lagrangian particle model. Transport and dispersion of pollutants or tracers are simulated by following the trajectories of virtual particles, each representing a finite mass and/or activity of the substance considered, in a three dimensional wind field (ECMWF analyses). Diffusion due to turbulence is prescribed by integrating the Langevin equation for displacement. Depletion of the mass particle by dry and wet deposition and radioactive decay or chemical transformation are accounted for by exponential reduction equations.


BOLAM is a limited-area hydrostatic model based on the primitive equations with parameterization of convection and other sub-grid physics (radiation, diffusion, cloud, soil). Daily runs, on a grid of 0.075 degrees (8.3 km) on the area shown in the image, are on display on the forecast page of ISAC, where more information can be found.


DREAMABOL is an offspring of BOLCHEM tailored to model mineral dust cycle (wind lift, diffusion, convection, advection, wet and dry deposition). The name is a tribute to DREAM (Nickovic et al, 2001) but the numerical code is written from scratch, making assumptions different from DREAM. Following the BOLCHEM philosophy of online coupling (Coupled Chemistry-Meteorology/Climate Modelling - CCMM).


MOLOCH is a non-hydrostatic limited-area model that integrates the fully compressible dynamical equations with parameterized diffusion, radiation, soil physics and cloud microphysics. As a convection-permitting model, it is designed to operate at resolutions coarser than the "grey area" of sub-km grid size.


SPRAY is a three dimensional model designed to simulate the airborne pollutant dispersion, able to take into account the spatial and temporal inhomogeneities of both the mean flow and turbulence. Concentration fields generated by point, areal or volume sources can be simulated by the model.


MicroSpray is a microscale Lagrangian particle model derived from SPRAY code and able to take into account the presence of obstacles. Microspray is especially oriented to deal with gas dispersion in urban environment and industrial sites.

RMS and MicroRMS

RMS and MicroRMS are modelling suites composed by the known atmospheric model RAMS, the boundary-layer parameterization code MIRS and the Lagrangian particle model (Micro)Spray. MIRS (Model for Interfacing RAMS and SPRAY) processes the meteorological RAMS output fields or, alternatively, other kinds of data fields deriving by observations or diagnostic models, then calculates the boundary-layer quantities and the Lagrangian turbulence fields.


SPRAY-WEB is the research-version of the Lagrangian particle model SPRAY. A consortium has been established and the partners consider of general utility that the model SPRAY could be made available to a wider researcher community, which contributes to its development, update and to a more disseminated use for environmental problems.


SMART - Spray-Moloch Atmospheric Regional Tool

A new modelling system, SMART, is under development for the simulation of the dispersion by accidental releases of pollutant in the atmosphere. It can be applied also for the assessment of continuous releases from known sources. In the new modelling suite SMART, the non-hydrostatic atmospheric model MOLOCH and the Lagrangian stochastic dispersion model SPRAY are interfaced by the boundary-layer and turbulence parameterization code ARAMIS (Atmospheric Regional Algorithm for Moloch Interfaced to Spray).