Open Access

Fig. 4

image

Maps of the line depth ratio of a weak SO2 multiplet (around 1345.1 cm−1) to the CO2 transition at 1345.22 cm−1. The data are the same as in Figs. 2 and 3. The subsolar point is shown as a white dot. The scale is not the same for the six maps; the maximum SO2 abundance is observed in July 2018.

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