9:40 AM - 9:55 AM
[PPS06-03] Temporal Evolution of the Venusian Atmospheric Superrotation Measured in the Venus Express Venus Monitoring Camera Data
Keywords:Venus, Venus Express, Wind Measurements
Our measurements so far have enabled us to analyze orbit-by-orbit changes in the zonal wind speeds in the southern hemisphere of Venus. We do not analyze the northern hemisphere because the VMC images do not provide consistent spatial coverage in the north. Our preliminary analysis reveals temporal evolution in the superrotation speed on Venus that shows that the wind speed fluctuated by 20 m/s between 2006 and 2014. Our result so far is comparable to the changes detected by Khatuntsev et al. (2013) and Kouyama et al. (2013) using VMC images, and Hueso et al. (2015) using VIRTIS data. Our study extends these results to detect temporal change in the wind over shorter timescales, and aims to link those changes to any transient event that may have affected the dynamics.