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Morphology and Dynamics of Venus's Middle Clouds With Akatsuki/IR1

Hueso, R.; Sánchez-Lavega, A.; Kardasis, E. +8 more

The Venusian atmosphere is covered by clouds with superrotating winds whose accelerating mechanism is still not well understood. The fastest winds, occurring at the cloud tops (∼70-km height), have been studied for decades, thanks to their visual contrast in dayside ultraviolet images. The middle clouds (∼50-55 km) can be observed at near-infrared…

Impact of Data Assimilation on Thermal Tides in the Case of Venus Express Wind Observation

Sugimoto, Norihiko; Takagi, Masahiro; Kouyama, Toru

Impacts of horizontal winds assimilation on thermal tides are investigated by using the Venus atmospheric general circulation model for the Earth Simulator local ensemble transform Kalman filter data assimilation system. The assimilated data are horizontal winds derived from Venus ultraviolet images taken by the Venus Monitoring Camera onboard the…