Open Access

Fig. 18


Volume mixing ratios of H2O (in ppmv, blue) and HDO (in ppbv, red), using the line depth ratios of H2 O/CO2 (blue) and HDO/CO2 (red) for the transitions shown in Fig. 17. Black: the D/H ratio inferred from the HDO/H2O line depth ratio. The data are shown as a function of latitude, integrated over the six scans. Data are from January 24, 2017.

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