Welcome to the official FLEXPART web site

FLEXPART (“FLEXible PARTicle dispersion model”) is a Lagrangian transport and dispersion model suitable for the simulation of a large range of atmospheric transport processes. Apart from transport and turbulent diffusion, it is able to simulate dry and wet deposition, decay, linear chemistry; it can be used in forward or backward mode, with defined sources or in a domain-filling setting. It can be used from local to global scale.

FLEXPART is a further development of its predecessor FLEXTRA (“FLEXible TRAjectory model”). Both FLEXTRA and FLEXPART have been open source models since the beginning and, over time have found a large international user community.

Code download

FLEXPART for ECMWF and NCEP/GFS data (the standard model version)

FLEXPART versions for input from other meteorological models

FLEXTRA is a simple trajectory model for the calculation of mean-wind trajectories.


FLEXPART documentation



There is an Index of all wiki pages (including those of the Trac system, not specific for FLEXPART) It can be accessed any by the link Index in the top right corner. Here is a list of important pages:

Ticket system

  • Users are invited to create tickets to the development team with bug reports, proposals for enhancements, etc. The ticket system is also used by the developers themselves.
  • Tickets can be viewed by anyone, and created by registered users.

About this site

This site uses Trac. Read more about details of its components (ticket system, wiki, etc.).

Last modified 3 months ago Last modified on Mar 14, 2024, 1:33:32 PM
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