Fig. 10

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Comparative long-term temporal evolution of H2O and SO2 at the Venus cloud top. Top: long-term variations in the H2O vmr (blue points), inferred from the HDO measurements at the cloud top from the TEXES data at 7.4 µm. Bottom: long-term variations in the SO2 vmr inferred at the cloud top (7.4 µm, red points). A daily value is shown in this figure.
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