The highly structured
developed at the
Max Planck Institute for Chemistry, Mainz, Germany
in collaboration with
DLR Institut for Physics of the Atmosphere, Oberpfaffenhofen, Germany
Forschungszentrum Karlsruhe, Germany
Meteorological Institute, Free University of Berlin, Germany
Meteorological Institute, Ludwig-Maximilians-University Munich, Germany
Max Planck Institute for Meteorology, Hamburg, Germany
MPG Rechenzentrum, Garching, Germany
Recent approaches towards Earth System Modeling follow a top-down
approach, coupling existing models of different domains (land, ocean,
atmosphere, ...) by means of a universal coupler. Yet, to study the
interactions between bio-physico-chemical processes, the internal
complexity of every domain specific model itself must be controllable
in a transparent and user friendly way.
The Modular Earth Submodel System provides
- not as an alternative, but rather as a complement to the domain couplers
- a bottom-up approach, including a generalized interface
structure for the standardized control of submodels and their
interconnections. This gives
remarkable new possibilities to study feedback mechanisms.
What is MESSy? MESSy is
MESSy is NOT messy!
You might ask, why we have chosen an acronym with such a negative touch ... ?
Well, we did this on purpose - to be self-ironic and a little provocative
to make people think about it - about how models have been so far ...
And it seems to work ...!
- an interface
with infrastructure to couple 'processes'
(= submodels) to a GCM (= base model)
- a set of processes coded as switchable
- a coding standard
Note of caution: The MESSy submodels
listed on this web-site
include contributions from many modelers in
several institutions. It is important that developers and
contributors to submodels are properly credited and informed. You are
requested to follow the guidelines as indicated with the submodels. In
case of doubt, errors, or disagreements, please contact the scientific
This page was last modified on
19 Oct 2007.
If you have comments or suggestions, e-mail me at