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/4463#issuecomment-699169927,https://api.github.com/repos/pydata/xarray/issues/4463,699169927,MDEyOklzc3VlQ29tbWVudDY5OTE2OTkyNw==,6815844,2020-09-25T21:42:40Z,2020-09-25T21:42:40Z,MEMBER,"Hi @aulemahal 

I think you want to interpolate along `t`as well as `x`, and `y`.
If so, you can do 

```python
In [8]: da.interp(t=dx['t'], y=dy, x=dx, method='linear')                       
Out[8]: 
<xarray.DataArray (t: 2, u: 2)>
array([[2., 3.],
       [2., 3.]])
Coordinates:
  * t        (t) int64 10 12
    y        (u) float64 1.5 2.5
    x        (t, u) float64 1.5 1.5 1.5 1.5
  * u        (u) int64 45 55
```

If not, this fails as `dx['t']` and `da['t']` do not match each other.
The error message can be improved.
A contribution is welcome ;)","{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",,709272776