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/1506#issuecomment-321599609,https://api.github.com/repos/pydata/xarray/issues/1506,321599609,MDEyOklzc3VlQ29tbWVudDMyMTU5OTYwOQ==,1217238,2017-08-10T16:14:30Z,2017-08-10T16:14:30Z,MEMBER,"> A first check of your theory (shoyer) reveals that if the time stamps are exectly the same, i.e. the date and the time is equal for each time step in the two netcdf-files, then the operation is working sucessfully.

Glad that worked!

> I only have to find a way to harmonize both datasets for time values prior operations with xarray ( a hard task considering model and evaluation data).

We have a few tools that might be useful here:
- Resampling: http://xarray.pydata.org/en/stable/time-series.html#resampling-and-grouped-operations
- Nearest neighbor lookups with `reindex`: http://xarray.pydata.org/en/stable/indexing.html#nearest-neighbor-lookups","{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",,249188875
https://github.com/pydata/xarray/issues/1506#issuecomment-321417223,https://api.github.com/repos/pydata/xarray/issues/1506,321417223,MDEyOklzc3VlQ29tbWVudDMyMTQxNzIyMw==,1217238,2017-08-10T00:28:42Z,2017-08-10T00:28:42Z,MEMBER,"Elementwise operations are supported between datasets, but only on aligned coordinates. In this case, it looks like there is no overlap for the ""time"" labels on each dataset -- maybe the dates are the same but the times differ slightly?","{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",,249188875