Code availability

Models are made available to the scientific community under licenses, which define the conditions under which the models, component models, and other software can be accessed and used. Most importantly, models are for scientific, and not for commercial use.

Models are available with no warranties or support!


Our model codes are made available exclusively to members of the ICON resp. MPI-ESM-user forums. To be a member of a forum, interested parties need to accept the license for the model in question. One of the main purposes of the license agreements and associated forums is to let us know who the model user community is, and establish a possibility for communicating with users. For this reason, we have conditioned access to the model code upon agreement to become a member of a user forum for MPI-ESM or ICON-ESM.

Other code is made available on the respective download pages or via GIT, subject to the license specified in the code package.


ICON is available under two different licenses:

An institutional one tailored to institutes entering cooperation agreements with DWD, and a personal non-commercial research ICON license for all persons interested in the model code.

More details on the licenses can be found here. By using ICON, the user accepts the individual license.

Visit the ICON-Downloads to download released versions of the ICON code - you need to register an account on the platform and request acces to the ICON code following one of the described procedures, before you can have access to releases of ICON, or special versions of ICON codes, available upon request/agreement. By registering you accept the personal non-commercial research ICON license.


You need to register there, before you can have access to MPI-ESM code. By registering you accept the MPI-ESM license version 3. Download MPI-ESM releaes from the MPI-ESM Users Forum after you've registered and agreed to the license.

Earlier versions

Archival (pre MPI-ESM) versions of the code are still available but subject to a different (earlier) licensing agreement. If you are interested in accessing one of these archival versions please contact Reinhard Budich for more information.



Reinhard Budich
Stategic IT Partnerships
Phone: +49 40 41173 369
Email: reinhard.budich@we dont want