[feat] Fall back to shift if alpha is too big

[hongyuanjia]

Pull request overview

• Fixes Alpha values could be quite big and thus introduce results far from reality #54

[codecov-commenter]

Codecov Report

Merging #55 (131b052) into master (79ab667) will decrease coverage by 42.76%.
The diff coverage is 0.00%.

@@             Coverage Diff             @@
##           master      #55       +/-   ##
===========================================
- Coverage   99.82%   57.06%   -42.77%     
===========================================
  Files           5        5               
  Lines        1167     1218       +51     
===========================================
- Hits         1165      695      -470     
- Misses          2      523      +521     

Impacted Files	Coverage Δ
R/esgf.R	98.78% <ø> (-1.22%)	⬇️
R/morph.R	0.22% <0.00%> (-99.78%)	⬇️
R/coord.R	74.78% <0.00%> (-25.22%)	⬇️
R/netcdf.R	90.15% <0.00%> (-9.33%)	⬇️

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