issues: 310833761

This data as json

id node_id number title user state locked assignee milestone comments created_at updated_at closed_at author_association active_lock_reason draft pull_request body reactions performed_via_github_app state_reason repo type
310833761 MDU6SXNzdWUzMTA4MzM3NjE= 2037 to_netcdf -> _fill_value without NaN 10194086 open 0     8 2018-04-03T13:20:19Z 2022-03-10T10:59:17Z   MEMBER      

Code Sample, a copy-pastable example if possible

```python

Your code here

import xarray as xr import numpy as np x = np.arange(10.) da = xr.Dataset(data_vars=dict(data=('dim1', x)), coords=dict(dim1=('dim1', x))) da.to_netcdf('tst.nc')

```

Problem description

Apologies if this was discussed somwhere and it probably does not matter much, but tst.nc has _FillValue although it is not really necessary.

Output of xr.show_versions()

# Paste the output here xr.show_versions() here 
{
    "url": "https://api.github.com/repos/pydata/xarray/issues/2037/reactions",
    "total_count": 0,
    "+1": 0,
    "-1": 0,
    "laugh": 0,
    "hooray": 0,
    "confused": 0,
    "heart": 0,
    "rocket": 0,
    "eyes": 0
}
     13221727 issue

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