Regional consists of a series of pre- and post-processors and computational codes, appropriately integrated with each other, for simulating the various processes that influence air quality in a specific geographic area: site characteristics, meteorological variables, emissions, dispersion, deposition, and atmospheric chemistry. Regional allows for the study of these processes from regional to local scales, considering both short-term and long-term periods (e.g., critical episodes or air quality standard evaluations). The system includes three-dimensional transport models, thus accounting for the complexity of the terrain (orography and land use) and time-evolving, spatially non-homogeneous meteorological and diffusion conditions.
Regional is available on various computing platforms and is integrated into an environment that allows for input preparation, selection of calculation options, execution of simulations, and interactive visualization of both the inputs and the three-dimensional outputs produced.