issue_comments: 518822084

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https://github.com/pydata/xarray/pull/3159#issuecomment-518822084 https://api.github.com/repos/pydata/xarray/issues/3159 518822084 MDEyOklzc3VlQ29tbWVudDUxODgyMjA4NA== 1217238 2019-08-06T20:02:35Z 2019-08-06T20:02:35Z MEMBER

If the default value is NaN, we could reuse xarray's pre-existing sentinel value for NA: https://github.com/pydata/xarray/blob/55593a8bcaf2edb79034507990eac9c55b41a07d/xarray/core/dtypes.py#L8

 
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