ice_mass_accounting_error = tendency_of_ice_mass - (tendency_of_ice_mass_due_to_flow + tendency_of_ice_mass_due_to_conservation_error + tendency_of_ice_mass_due_to_basal_mass_flux + tendency_of_ice_mass_due_to_surface_mass_flux + tendency_of_ice_mass_due_to_discharge); ice_mass_accounting_error@long_name = "ice mass accounting error";