html_url,issue_url,id,node_id,user,created_at,updated_at,author_association,body,reactions,performed_via_github_app,issue
https://github.com/pydata/xarray/issues/5165#issuecomment-820706339,https://api.github.com/repos/pydata/xarray/issues/5165,820706339,MDEyOklzc3VlQ29tbWVudDgyMDcwNjMzOQ==,39069044,2021-04-15T20:20:26Z,2021-04-15T20:20:26Z,CONTRIBUTOR,"In fact an even simpler calculation also shows the same problem:
```python
import xarray as xr
import pandas as pd
import numpy as np
import dask.array as da

dates = pd.date_range('1980-01-01', '2019-12-31', freq='D')
ds = xr.Dataset(
    data_vars = {
        'x1':(
            ('time', 'lat', 'lon'), 
            da.random.random(size=(dates.size, 360, 720), chunks=(1, -1, -1))),
        'x2':(
            ('time', 'lat', 'lon'), 
            da.random.random(size=(dates.size, 360, 720), chunks=(1, -1, -1))),
    },
    coords = {
        'time': dates,
        'lat': np.arange(-90, 90, .5),
        'lon': np.arange(-180, 180, .5),
    }
)

ds['x3'] = ds.x2 - ds.x1
ds[['x3']].to_zarr('test-anom', mode='w')
```","{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",,859218255