[A-CG36] Dynamics of Oceanic and Atmospheric Waves, Vortices, and Circulations

[ACG36-P07] Spontaneous gravity wave radiation from thermal tides in the Venus atmosphere

*Norihiko Sugimoto¹, Yukiko Fujisawa¹, Hiroki Kashimura², Katsuyuki Noguchi³, Takeshi Kuroda⁴, Masahiro Takagi⁵, Yoshi-Yuki Hayashi² (1.Keio University, 2.Kobe University, 3.Nara Women’s University, 4.Tohoku University, 5.Kyoto Sangyo University)

Keywords:Venus Atmosphere, thermal tides, gravity waves, spontaneous generation

In the present study, we use high-resolution Venus general circulation model (AFES-Venus) with less than 20 and 0.25 km in the horizontal and vertical grid intervals, respectively, to investigate spontaneous gravity wave radiation from nearly balanced flows in the Venus atmosphere. Small-scale gravity waves are radiated from thermal tides in the low-latitudes and baroclinic/barotropic waves in the mid- and high-latitudes in the super rotation of the cloud layer (~70 km). The small-scale gravity waves affect the three-dimensional structure of the super-rotation. The generation mechanism will be discussed in the poster (see figure also).

Sugimoto, N. et al., Generation of gravity waves from thermal tides in the Venus atmosphere, Nature Communications, Vol.12, (2021), 3682, doi:10.1038/s41467-021-24002-1. Featured on Editors’ Highlights webpage in Astronomy and planetary science.