Add link to grid description file in the output

[koldunovn]

Now cdo have capability to use grid description file that is stored remotely (https://code.mpimet.mpg.de/projects/cdo/embedded/cdo.pdf Section 1.4.3). This can be specified in global attribute grid_file_uri .

It would be nice to have this option for FESOM output as well.

Thanks to @helgegoessling for pointing this out. Ping @pgierz

[JanStreffing]

Link to where mesh descripts will be:
https://swiftbrowser.dkrz.de/public/dkrz_035d8f6ff058403bb42f8302e6badfbc/FESOM_MESHES2.1/

[JanStreffing]

Or we use: https://gitlab.awi.de/fesom/core2/-/raw/master/core2_griddes_nodes.nc
from: https://gitlab.awi.de/fesom

But we need to update them then.

[pgierz]

Should we create a simple reproducible workflow to upload benchmarked meshes semi-automatically? I did something similar for @koldunovn for uploading meshes to zenodo.

[koldunovn]

I think the cleanest solution probably would be to use zenodo repository: https://zenodo.org/communities/fesom2_meshes/records?q=&l=list&p=1&s=10&sort=newest

Meshes there can have doi and can be accessed from anywere by anyone. It also has versioning, so we can update them if needed. The AIW gitlab become problematic for large meshes, it just does not support big enough files.

Referencing existing folder on the machine of course has it's advantages, you should not download anything every time you want to plot a field...

[JanStreffing]

@koldunovn Would you consider this high enough prio to work on this in the next, say two weeks, before 2.7 release? :)

[koldunovn]

Not at all, low priority. We also have to have some consistent place to store grids files.