merge multiple files of one dataset one or according to frq

[nilshempelmann]

Description

In contrast to flyingpigeon finch operated on single files instead of entire Datasets. Which is a good idea for not running into memory issues. But the multiple output files should be merged at some point.

Suggestion providing a process doing cdo mergetime infies outfile or/and give an additional option for the indices process. Per default the indices processes shoud respect the CMIP/CORDEX archive specifications in terms of file slices.
https://is-enes-data.github.io/cordex_archive_specifications.pdf

Hint: here is a datasets sorting function finding the corresponding files
https://eggshell.readthedocs.io/en/latest/_modules/eggshell/nc/nc_utils.html#sort_by_filename