A parametric study of atmospheric superrotation on Venus-like planets

Effects of oblique angle of planetary rotation axis

Masaru Yamamoto, Masaaki Takahashi

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

Parametric experiments of superrotation on slowly rotating planets, such as Venus, were conducted. The oblique angle of the planetary rotation axis is one of the most important parameters in the dynamics of the superrotation. New relationships are found for the maximum mean zonal flow, meridional flow, and equatorpole temperature difference. For low obliquity, the dynamic state alternates between weak and strong superrotations with a period of about 10000 days in the phase space, and small fluctuations of about 1000 days are also seen. Fully-developed superrotation is maintained by meridional circulation and waves in the case of a slightly oblique angle. However, it is not formed in the case of a highly oblique angle, since the vertical transport of angular momentum due to meridional circulation is ineffective at the solstices. The superrotational wind becomes larger with decreasing obliquity.

Original languageEnglish
Article numberL16202
JournalGeophysical Research Letters
Volume34
Issue number16
DOIs
Publication statusPublished - Aug 28 2007

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superrotation
planetary rotation
obliquity
Venus (planet)
meridional circulation
Venus
planet
zonal flow
angular momentum
meridional flow
solstices
planets
temperature gradients
experiment
temperature
effect

All Science Journal Classification (ASJC) codes

  • Geophysics
  • Earth and Planetary Sciences(all)

Cite this

A parametric study of atmospheric superrotation on Venus-like planets : Effects of oblique angle of planetary rotation axis. / Yamamoto, Masaru; Takahashi, Masaaki.

In: Geophysical Research Letters, Vol. 34, No. 16, L16202, 28.08.2007.

Research output: Contribution to journalArticle

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