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/3942#issuecomment-610444090,https://api.github.com/repos/pydata/xarray/issues/3942,610444090,MDEyOklzc3VlQ29tbWVudDYxMDQ0NDA5MA==,1197350,2020-04-07T15:10:40Z,2020-04-07T15:10:40Z,MEMBER,"I agree with Deepak. Xarray intelligently chooses its encoding when it write the initial dataset to make sure it has enough precision to resolve all times. It cannot magically know that, in the future, you plan to append data which requires greater precision. Your options are:
- If you know from the outset that you will require greater precision in time encoding, you can manually specify your encoding before you write (http://xarray.pydata.org/en/stable/io.html#scaling-and-type-conversions)
- If you don't know from the outset, you will have to overwrite the full time variable with new encoding

I also agree that we should definitely be raising a warning (or even an error) in your situation.","{""total_count"": 2, ""+1"": 2, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",,595492608