Changing fill_value from None to 'extrapolate' for ozone data

[AndrewILWilliams]

For an xr.DataArray() with 1-dimensional coordinates, da.interp_like() actually calls scipy's interp1d function, rather than interpn. As a result, to extrapolate to values outside the domain, you need to pass fill_value='extrapolate', rather than fill_value=None.

[brian-rose]

Interesting! I wonder if there's been a change in the default behavior of interp1d? Apparently I used to think "None" was the correct argument.

[AndrewILWilliams]

Looking at the release notes it seems that this was a change at v0.17.0, so around 2016/2017!

Now, lets see if it passes CI...

[codecov-io]

Codecov Report

Merging #140 (c6765a7) into master (dfe4c52) will not change coverage.
The diff coverage is 0.00%.

@@          Coverage Diff           @@
##           master    #140   +/-   ##
======================================
  Coverage    0.00%   0.00%           
======================================
  Files          66      66           
  Lines        3552    3552           
======================================
  Misses       3552    3552           

Impacted Files	Coverage Δ
climlab/radiation/radiation.py	0.00% <0.00%> (ø)

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[brian-rose]

Excellent, thanks!

[brian-rose]

All tests are passing, merging now.