Obtaining the source code
Since we want MESSy to be useful for the whole scientific community, we
decided to make the source code available under the
GNU General Public License (GPL)
Basically, the GPL allows you to use MESSy at no charge.
However, the GPL was not written with scientific programs in mind.
Therefore, the source-code will not be accessible on the web.
If you would like to use or to contribute to MESSy, please send a
letter of intent to
Your letter of intent (preferably ASCII or PDF) should contain
Soon after we have received your letter,
we are going to contact you via e-mail.
- your institution
- your full address
- your e-mail address, since we will contact you via e-mail
- a detailed description of what you intend to do with MESSy
(including a description of planned funding proposals, see below)
- a list of submodels you are interested in
(see MESSy Submodels)
- a statement that you accept the license conditions on this web page
Please note further:
If you plan to apply for external funding
and your proposal involves the
application and/or further development of MESSy, you are requested to
to avoid conflicts of interest.
- All MESSy submodels are classified individually, depending on their
development and publication status (see list of submodels:
information on the classification can be found here:
MESSy-submodel license information).
- When you are going to publish results based on MESSy in a
scientific journal, the
Commons Attribution-NonCommerical-ShareAlike Licence also applies.
In particular, we ask you to obey these points:
- Please discuss a potential co-authorship with us. Usually, we
request co-authorship only, if model results obtained with MESSy
main topic of your manuscript and not, if they are just a minor
aspect of it.
- Please cite the following publication:
Patrick Jöckel, Rolf Sander, Astrid Kerkweg, Holger Tost,
and Jos Lelieveld,
Technical Note: The Modular Earth Submodel System (MESSy) -
a new approach towards Earth System Modeling,
Atmos. Chem. Phys., 5, 433-444,
SRef-ID: 1680-7324/acp/2005-5-433, 2005.
(-full text online (pdf)-)
- Please send a reprint of your paper to
We'd also appreciate receiving a preprint before you submit your
- If you have written additional code which is based on MESSy, you
must also make it available to the scientific community using this
license. Please email us a copy of your new code. This will help
us to coordinate developments of different research groups.
- The base model ECHAM5 is NOT part of MESSy!
The GCM ECHAM5 has been developed at the Max Planck-Institute for
Meteorology in Hamburg.
If you want to use ECHAM5/MESSy, you need to apply for a ECHAM5
license first. Required information can be found here:
Please send us a copy of the ECHAM5 license approval
together with your letter of intent.
This page was last modified on
29 Jun 2006.
If you have comments or suggestions, e-mail me at