Disk-integrated spectrum recorded by TEXES on January 14, 2016, between 529.24 and 529.345 cm^-1 (19 μm), showing weak transitions of CO₂ and CO₂. The date and duration of the corresponding observation are indicated in Table 2. The January 2016 run corresponds to the strongest SO₂ content measured at the cloupdtop between 2012 and 2016. Thick black line: TEXES data; thin lines: models. Green: SO₂ = 200 ppbv with cutoff; red (best fit): SO₂ = 300 ppbv with cutoff; blue: SO₂ = 400 ppbv with cutoff; black: SO₂ = 65 ppbv, constant with altitude. The spectral resolution is 0.010 cm^-1.