Hi Unfortunately the proposed patch doesn't fix the problem.
With later versions of xarray now using pooch to download data, and failing if its not setup, a better fix to the download issue is needed.
regards Alastair -- Alastair McKinstry, GPG: 82383CE9165B347C787081A2CBE6BB4E5D9AD3A5 ph: +353 87 6847928 e: alast...@mckinstry.ie, im: @alastair:mckinstry.ie