issue_comments: 729793908

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https://github.com/pydata/xarray/issues/4591#issuecomment-729793908 https://api.github.com/repos/pydata/xarray/issues/4591 729793908 MDEyOklzc3VlQ29tbWVudDcyOTc5MzkwOA== 1197350 2020-11-18T16:27:30Z 2020-11-18T16:27:30Z MEMBER

I finally found a permutation that works, which makes me think this is an fsspec error.

```python import gcsfs

gcs = gcsfs.GCSFileSystem() url = 'gs://ldeo-glaciology/bedmachine/BedMachineAntarctica_2019-11-05_v01.nc'
openfile = gcs.open(url, mode='rb') dsgcs = xr.open_dataset(openfile, chunks=3000) dsgcs.surface.mean().compute() ```

 
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