Bias Correction

The bias-correction approach (early draft):

1. Compute a climatology of CMIP data over a chosen baseline period (TBD).

2. Subtract the CMIP climatology, add the observational climatology.

3. Extrapolate into shelves, cavities, ice, and bathymetry as needed.

Modules: i7aof.biascorr.timeslice, i7aof.biascorr.projection.