use the LLC270 parameters from
MITgcm_contrib/ecco_darwin/v4_llc270/code
MITgcm_contrib/ecco_darwin/v4_llc270/input
but with some TBD modifications to 
make it more similar, but not identical, to cube92

TBD modifications:
1) KPP instead of ggl90
2) GM/Redi off