Ignacio PissoFLEXPART is a model for atmospheric transport representing the Lagrangian trajectories of a large number of particles in the atmosphere. These particles, that can be tracked forward or backwards in time, are driven by Eulerian wind fields such as those produced by 3D meteorological models.
Applications include the assessment of • the impact of pollutant releases on air quality, • ozone depletion substances, • nuclear power plant accidents and other nuclear activities involving the release of radionuclides, • greenhouse gases emissions among others.
Flexpart is free software, the site http://flexpart.eu provides more detailed information.
This is the Wiki page of FLEXPART at NILU GitLab server