The -Wmaybe-uninitialized GFortran option will list many variables that may be used before initialized. While several of these warnings are likely false positives, that is most likely due to the branching done in the code causing certain, unlikely paths (and sometime error paths) that do not initialize the variable. These cases need to be evaluated, and if possible corrected.

Currently ScmDataFrame uses datetime.datetime to represent dates internally. As the rest of OpenSCM uses np.datetime64, this could/should be replaced by np.datetime64.

At the moment the names returned by pymagicc are not consistent with RCMIP. It would reduce confusion if we made them so, as then there's fewer naming conventions to worry about.