Long-term variations of mean winds and planetary-scale waves at the cloud top of Venus observed with Akatsuki/UVI

堀之内 武; 神山 徹; 今井 正尭; 山崎 敦; 佐藤 毅彦

講演情報

[E] 口頭発表

セッション記号 P (宇宙惑星科学) » P-PS 惑星科学

[P-PS04] Advancing the science of Venus in the golden age of exploration

2023年5月24日(水) 10:45 〜 12:00 展示場特設会場 (3) (幕張メッセ国際展示場)

コンビーナ:佐藤毅彦(宇宙航空研究開発機構・宇宙科学研究本部)、はしもとじょーじ(岡山大学学術研究院自然科学学域)、Moa Persson(Graduate School of Frontier Sciences, The University of Tokyo, Kashiwa, Japan)、Kevin McGouldrick(University of Colorado Boulder)、座長:佐藤毅彦(宇宙航空研究開発機構・宇宙科学研究本部)、今村剛(東京大学大学院　新領域創成科学研究科)

11:00 〜 11:15

[PPS04-12] Long-term variations of mean winds and planetary-scale waves at the cloud top of Venus observed with Akatsuki/UVI

*堀之内武¹、神山徹²、今井正尭³、山崎敦⁴、佐藤毅彦⁴ (1.北海道大学地球環境科学研究院、2.産総研、3.京都産業大学、4.宇宙研)

キーワード：Venus、Wind、Wave

Akasuki has been in operation since its orbital insertion in Dec 2015, and UVI onboard Akatsuki has been nearly continuously observing dayside UV radiance from around the cloud top. Horinouchi et al (2018) documented the mean winds and their variations obtained over the first ~1.5 years. Here, we update the study with the observation up to 2022, and we further report long-term statistics of planetary-scale waves, updating the case study of Imai et al (2019). The topics include hemispheric asymmetry and its variability, long-term and low-frequency variations of the superrotation, thermal tides, and statistics of the Rossby and the equatorial Kelvin waves.