Ozone trends have been studied since 1970, showing an increase in the height of the tropopause and a movement of the ozone profile upwards. This movement has caused additional ozone depletion in the atmosphere. The part of the ozone trend related to this movement should not be included in calculations of human-caused ozone depletion. When considering both stratospheric and tropospheric ozone changes, the total ozone radiative forcing in the Northern Hemisphere from 1970 to 1997 was found to be -0.09 W m^-2. Not accounting for the movement of the ozone profile could lead to flawed estimates of ozone radiative forcing due to unquantified feedbacks in the climate system.