Atmospheric general circulations of cloud-covered planets

云层覆盖的行星的大气环流

• 批准号: 20740273
• 负责人: YAMAMOTO Masaru
• 金额: $ 2.66万
• 依托单位: Kyushu University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Young Scientists (B)
• 财政年份: 2008
• 资助国家: 日本
• 起止时间: 2008 至 2010
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-20740273/
• 关键词: 惑星大気; 大気大循環; 大気波動; 地球流体力学

An unified theory of planetary atmospheric circulation, which can be applied for wide ranges of physical parameters, is required to study atmospheric dynamics of extrasolar terrestrial planets. The present work elucidates sensitivities of cloud-covered middle-atmospheric general circulation to astronomical parameters. As tilt of the planetary rotation axis is increased, superrotational flow (prograde atmospheric rotation) becomes weaker. For more than 60Ω, subrotational flow (retrograde atmospheric rotation) is formed. In slowly rotating planets, the retrograde rotation rate is limited to -Ω (where Ω is the planetary rotation rate). In addition, the present work elucidates sensitivity of the superrotation to diabatic heating rate below the cloud layer. Small changes in the weak lower-atmospheric heating lead to drastic changes of the middle-atmospheric superrotation.

太阳系外类地行星的大气动力学研究需要一个适用于大范围物理参数的行星大气环流统一理论。本工作阐明了云覆盖的中层大气环流对天文参数的敏感性。当行星自转轴的倾斜度增加时，超旋转流（逆大气旋转）变得更弱。大于60Ω时，形成亚旋转流（逆行大气旋转）。在缓慢旋转的行星中，逆行旋转速率被限制为-Ω（其中Ω是行星的旋转速率）。此外，本文还阐明了超旋转对云层下非绝热加热率的敏感性。低层大气微弱加热的微小变化导致中层大气超旋的剧烈变化。

项目成果

Modeling of 4-6 day waves using a Venus middle atmosphere GCM

使用金星中层大气 GCM 对 4-6 天波进行建模

• 发表时间: 2009
• 作者: Ohno;Y.;N. Iwasaka;F. Kobashi;and Y. Sato;Masaru Yamamoto;Masaru Yamamoto
• 通讯作者: Masaru Yamamoto

Influences of Venus’ topography on fully developed superrotation and near-surface flow

金星地形对完全发展的超级自转和近地表流的影响

• DOI: 10.1186/bf03352962
• 发表时间: 2009
• 期刊: Earth, Planets and Space
• 作者: Masaru Yamamoto;M. Takahashi
• 通讯作者: M. Takahashi

Microscale simulations of Venus' convective adjustment and mixing near the surface : thermal and material transport

金星表面附近的对流调整和混合的微观模拟：热和物质传输

• 发表时间: 2011
• 期刊: Icarus 211
• 作者: 小橋史明;謝尚平;Masaru Yamamoto
• 通讯作者: Masaru Yamamoto

Application of GCM to the Venus middle atmosphere dynamics

GCM在金星中层大气动力学中的应用

• 发表时间: 2010
• 作者: Ohno;Y.;N. Iwasaka;F. Kobashi;and Y. Sato;Masaru Yamamoto
• 通讯作者: Masaru Yamamoto

Dynamical effects of solar heating below the cloud layer in a Venus-like atmosphere

类金星大气中云层下方太阳加热的动态效应

• 发表时间: 2009
• 期刊: Journal of Geophysical Research 114巻
• 作者: Masaru Yamamoto;Masaaki Takahashi
• 通讯作者: Masaaki Takahashi