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.

Read more about FLEXPART ...

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). 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.). For a list of all wiki pages you may also use the link Index the top right corner.

Last modified 5 years ago Last modified on Jul 24, 2019, 4:05:35 PM
hosted by ZAMG