論文

査読有り
2020年4月24日

How waves and turbulence maintain the super-rotation of Venus’ atmosphere

Science
  • Takeshi Horinouchi
  • Yoshi-Yuki Hayashi
  • Shigeto Watanabe
  • Manabu Yamada
  • Atsushi Yamazaki
  • Toru Kouyama
  • Makoto Taguchi
  • Tetsuya Fukuhara
  • Masahiro Takagi
  • Kazunori Ogohara
  • Shin-ya Murakami
  • Javier Peralta
  • Sanjay S. Limaye
  • Takeshi Imamura
  • Masato Nakamura
  • Takao M. Sato
  • Takehiko Satoh
  • 全て表示

368
6489
開始ページ
405
終了ページ
409
記述言語
掲載種別
研究論文(学術雑誌)
DOI
10.1126/science.aaz4439
出版者・発行元
American Association for the Advancement of Science (AAAS)

Venus has a thick atmosphere that rotates 60 times as fast as the surface, a phenomenon known as super-rotation. We use data obtained from the orbiting Akatsuki spacecraft to investigate how the super-rotation is maintained in the cloud layer, where the rotation speed is highest. A thermally induced latitudinal-vertical circulation acts to homogenize the distribution of the angular momentum around the rotational axis. Maintaining the super-rotation requires this to be counteracted by atmospheric waves and turbulence. Among those effects, thermal tides transport the angular momentum, which maintains the rotation peak, near the cloud top at low latitudes. Other planetary-scale waves and large-scale turbulence act in the opposite direction. We suggest that hydrodynamic instabilities adjust the angular-momentum distribution at mid-latitudes.

リンク情報
DOI
https://doi.org/10.1126/science.aaz4439
URL
https://syndication.highwire.org/content/doi/10.1126/science.aaz4439
ID情報
  • DOI : 10.1126/science.aaz4439
  • ISSN : 0036-8075
  • eISSN : 1095-9203

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