Profiles of BASE seasonal total ozone column mass changes 1O3 for each CMAQ model layer due to the effects of horizontal advection (HADV), vertical advection (ZADV), horizontal diffusion (HDIF), vertical diffusion (VDIF), dry deposition (DDEP), chemistry (CHEM), and cloud processes including vertical mixing by convective clouds (CLDS). The values are summed over the entire modeling domain and represent the net change in ozone mass due to a given process in a given model layer and season.