Hello,
I am quite happy to hear that the climdatastore is starting to integrate Zarr based ARCO data hosted in object storage. We use zarr hosted on object storage internally and have made very good experiences in terms of hosting cost, performance and especially ease of use. So when the cdsapi prompted me that the dataset in question is also available in ARCO format I started looking into it.
The thing is I found a lot of references to the ARCO dataset documentation and quite a lengthy documentation on the ARCO datasts. But not an extensive list of Zarr Store URLS. The only one I found was the one for regular ERA5 Dataset in some example code. This is the documentation I am looking at Analysis Ready Cloud Optimised (ARCO) timeseries - Copernicus Knowledge Base - ECMWF Confluence Wiki.
This is a quite common theme that unfortunately is quite common in the scientific community of neglecting practical access to the data. The Documentation for the ARCO Datasets should lead with the URL to the dataset. Everything else is secondary. Similar to git repository readmes lead with the install install instructions.
