Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2018GL080917 |
Fully Developed Superrotation Driven by the Mean Meridional Circulation in a Venus GCM | |
Sugimoto, Norihiko1; Takagi, Masahiro2; Matsuda, Yoshihisa3 | |
2019-02-16 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS |
ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2019 |
卷号 | 46期号:3页码:1776-1784 |
文章类型 | Article |
语种 | 英语 |
国家 | Japan |
英文摘要 | Fully developed superrotation is reproduced for the first time in very long term simulations with a dynamical Venus general circulation model (GCM) driven by a zonally averaged component of the realistic solar heating only. Starting from a motionless state with temperature distribution including a low static stability layer in the lower cloud layer, the fast superrotating zonal flow of similar to 100 m/s is established after 500 Earth years. In this experiment, the mean meridional circulation is responsible for generating the superrotation, because effects of thermal tides, topography, radiation process, and cloud physics are excluded in the present simulations. Sensitivity experiments indicate that the vertical eddy viscosity smaller than 0.02 m(2)/s is necessary for the fast superrotation to appear. The low static stability layer also strongly affects the superrotation with high-latitude jets through angular momentum transport by baroclinic/barotropic instability in the cloud layer. Plain Language Summary The generation mechanism of the atmospheric superrotation on Venus is one of the most important topics in the Earth and planetary sciences. Here we reproduced the fully developed superrotation for the first time in a Venus general circulation model (GCM) driven by a zonally averaged component of the realistic solar heating only. Our GCM enables us to perform long-term simulations with medium resolution higher than those used in previous studies. It is newly found that mean meridional circulation driven by the realistic solar heating can generate the fully developed superrotation of similar to 100 m/s with the vertical eddy viscosity smaller than 0.02 m(2)/s. It is also elucidated that a weakly stratified layer observed in the cloud layer, but neglected in previous GCMs, also strongly affects the superrotation with high-latitude jets through angular momentum transport by baroclinic/barotropic instability. Existence of the range of the vertical eddy viscosity in which the fast superrotation can be generated by the reasonable solar heating has broad implications for the atmospheric sciences in light of optimal parameters for the GCMs. The present results are of fundamental importance in the Earth and planetary sciences to understand the variety of general circulation of the planetary atmospheres. |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000462072800072 |
WOS关键词 | RADIO OCCULTATION MEASUREMENTS ; ATMOSPHERE ; WAVES ; MODEL |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/181398 |
专题 | 气候变化 |
作者单位 | 1.Keio Univ, Dept Phys, Res & Educ Ctr Nat Sci, Yokohama, Kanagawa, Japan; 2.Kyoto Sangyo Univ, Fac Sci, Kyoto, Japan; 3.Tokyo Gakugei Univ, Dept Astron & Earth Sci, Tokyo, Japan |
推荐引用方式 GB/T 7714 | Sugimoto, Norihiko,Takagi, Masahiro,Matsuda, Yoshihisa. Fully Developed Superrotation Driven by the Mean Meridional Circulation in a Venus GCM[J]. GEOPHYSICAL RESEARCH LETTERS,2019,46(3):1776-1784. |
APA | Sugimoto, Norihiko,Takagi, Masahiro,&Matsuda, Yoshihisa.(2019).Fully Developed Superrotation Driven by the Mean Meridional Circulation in a Venus GCM.GEOPHYSICAL RESEARCH LETTERS,46(3),1776-1784. |
MLA | Sugimoto, Norihiko,et al."Fully Developed Superrotation Driven by the Mean Meridional Circulation in a Venus GCM".GEOPHYSICAL RESEARCH LETTERS 46.3(2019):1776-1784. |
条目包含的文件 | 条目无相关文件。 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。
修改评论