interpolate the 2 components of a vector field together: this allows to account properly for local orientation when averaging at N & S pole.
interpolate the 2 components of a vector field together: this allows
to account properly for local orientation when averaging at N & S pole.

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