def _get_current_albedo(self):
        '''Simple step-function albedo based on ice line at temperature Tf.'''
        ice = self.subprocess['iceline'].ice
        # noice = self.subprocess['iceline'].diagnostics['noice']
        cold_albedo = self.subprocess['cold_albedo'].albedo
        warm_albedo = self.subprocess['warm_albedo'].albedo
        albedo = Field(np.where(ice, cold_albedo, warm_albedo), domain=self.domains['Ts'])
        return albedo
Simple step-function albedo based on ice line at temperature Tf.