Workflow for DECK experiments

Subsets
ECHAM6 Variables were subdived into two parts because of a lack of data storage and because of technical issues with 3d data.
The first part covers 3hrly and monthly data and simulations of DECK experiments have been successfully published in the ESGF.
The second part covers 6hrly 3 dimensional data which also requires a aggregation post-processing.
Parallelization
DECK experiments have been parallelized over time. This requires
```
output_mode=r(eplace)
```
and the standardized chunks cover the same temporal period like the raw input data.

CMIP6-BMBF » CMIP6-DICAD