Plot Sea Surface Temperature

[wood-chris]

the 1st exercise for the parallel data stuff asks for "the nearest date to January 1st 1965" but when we do that the output is

array([[nan, nan, nan, ..., nan, nan, nan],
       [nan, nan, nan, ..., nan, nan, nan],
       [nan, nan, nan, ..., nan, nan, nan],
       ...,
       [nan, nan, nan, ..., nan, nan, nan],
       [nan, nan, nan, ..., nan, nan, nan],
       [nan, nan, nan, ..., nan, nan, nan]],
      shape=(1206, 1440), dtype=float32)

which I think is a little disconcerting....