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Super-rotation independent of horizontal diffusion reproduced in a Venus GCM.

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Titel: Super-rotation independent of horizontal diffusion reproduced in a Venus GCM.
Autoren: Sugimoto, Norihiko, Fujisawa, Yukiko, Komori, Nobumasa, Kashimura, Hiroki, Takagi, Masahiro, Matsuda, Yoshihisa
Quelle: Earth, Planets & Space; 3/24/2023, Vol. 75 Issue 1, p1-9, 9p
Schlagwörter: GENERAL circulation model, VENUS (Planet), VENUSIAN atmosphere, ANGULAR momentum (Mechanics)
Abstract: Horizontal diffusion and resolution are important factors to generate and maintain the super-rotation in the general circulation model (GCM) because waves which transport angular momentum are sensitive to them. Here, we investigated how the super-rotation depends on the magnitude of horizontal hyper diffusion using a Venus atmospheric GCM with medium and high resolutions. In both the runs, we found a parameter range where the structure of fully developed super-rotation is almost independent of the magnitude of horizontal diffusion. Spectral analysis shows that unrealistically strong super-rotation is developed when medium-scale disturbances are dissipated by stronger horizontal diffusion. On the other hand, artificially weak super-rotation is also realized because spurious small-scale disturbances are accumulated when the horizontal diffusion is too weak. [ABSTRACT FROM AUTHOR]
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  Data: Super-rotation independent of horizontal diffusion reproduced in a Venus GCM.
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  Data: <searchLink fieldCode="AR" term="%22Sugimoto%2C+Norihiko%22">Sugimoto, Norihiko</searchLink><br /><searchLink fieldCode="AR" term="%22Fujisawa%2C+Yukiko%22">Fujisawa, Yukiko</searchLink><br /><searchLink fieldCode="AR" term="%22Komori%2C+Nobumasa%22">Komori, Nobumasa</searchLink><br /><searchLink fieldCode="AR" term="%22Kashimura%2C+Hiroki%22">Kashimura, Hiroki</searchLink><br /><searchLink fieldCode="AR" term="%22Takagi%2C+Masahiro%22">Takagi, Masahiro</searchLink><br /><searchLink fieldCode="AR" term="%22Matsuda%2C+Yoshihisa%22">Matsuda, Yoshihisa</searchLink>
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  Data: Earth, Planets & Space; 3/24/2023, Vol. 75 Issue 1, p1-9, 9p
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  Data: <searchLink fieldCode="DE" term="%22GENERAL+circulation+model%22">GENERAL circulation model</searchLink><br /><searchLink fieldCode="DE" term="%22VENUS+%28Planet%29%22">VENUS (Planet)</searchLink><br /><searchLink fieldCode="DE" term="%22VENUSIAN+atmosphere%22">VENUSIAN atmosphere</searchLink><br /><searchLink fieldCode="DE" term="%22ANGULAR+momentum+%28Mechanics%29%22">ANGULAR momentum (Mechanics)</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Horizontal diffusion and resolution are important factors to generate and maintain the super-rotation in the general circulation model (GCM) because waves which transport angular momentum are sensitive to them. Here, we investigated how the super-rotation depends on the magnitude of horizontal hyper diffusion using a Venus atmospheric GCM with medium and high resolutions. In both the runs, we found a parameter range where the structure of fully developed super-rotation is almost independent of the magnitude of horizontal diffusion. Spectral analysis shows that unrealistically strong super-rotation is developed when medium-scale disturbances are dissipated by stronger horizontal diffusion. On the other hand, artificially weak super-rotation is also realized because spurious small-scale disturbances are accumulated when the horizontal diffusion is too weak. [ABSTRACT FROM AUTHOR]
– Name: Abstract
  Label:
  Group: Ab
  Data: <i>Copyright of Earth, Planets & Space is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1186/s40623-023-01806-7
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      – Code: eng
        Text: English
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        Type: general
      – SubjectFull: VENUS (Planet)
        Type: general
      – SubjectFull: VENUSIAN atmosphere
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      – SubjectFull: ANGULAR momentum (Mechanics)
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      – TitleFull: Super-rotation independent of horizontal diffusion reproduced in a Venus GCM.
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              M: 03
              Text: 3/24/2023
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              Y: 2023
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