Top: map of the line depth ratio of H₂O₂/CO₂ retrieved from the TEXES data recorded on July 3, 2014 (Ls = 156°). The black circle corresponds to Region B where the TEXES spectra were modeled (see text). Bottom left: map of the TEXES H₂O₂/CO₂ mixing ratio, inferred from the H₂O₂/CO₂ line depth ratio map. Bottom right: GCM synthetic map of the H₂O₂ column-averaged mixing ratio calculated for the same observing conditions.