add storing ptracer and initialise totSurfCotrPTr in order to make TAF happy (analogous to the treatment of theta and salt)
add storing ptracer and initialise totSurfCotrPTr in order to make TAF
happy (analogous to the treatment of theta and salt)

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