The CLOUD submodel calculates the processes usually called cloud microphysics.
Via namelist one of the implemented parametrisations can be chosen and the
necessary calculations are performed automatically.
At the momentary state the only scheme that is implemented is the
original cloud microphysics routine from the ECHAM5 from MPI
Hamburg. These routines have been modularised and adapted into the MESSy
- structure, but still perform the same microphysical calculations as
the original routine.
A short description of the processes in the cloud scheme are documented
here .
In this module the cloud cover scheme of the original ECHAM5 is also
implemented and these calculations were performed just the same way as
in the original.
In addition to this the cloud droplet number concentration calculation
has been moved into this module. This is still the original
parametrisation, but it will be extended to a more physical coupling to
an aerosol module in the future.