use viscAr & diffKrT instead of viscAz & diffKzT (to avoid confusion    when delRc is used)
use viscAr & diffKrT instead of viscAz & diffKzT (to avoid confusion
   when delRc is used)

altMITgcm/MITgcm66h,altMITgcm/MITgcm66h,altMITgcm/MITgcm66h,altMITgcm/MITgcm66h,altMITgcm/MITgcm66h,altMITgcm/MITgcm66h,altMITgcm/MITgcm66h,altMITgcm/MITgcm66h