| DOI: | 10.1038/s41561-018-0070-3
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| 论文题名: | Cyclonic circulation of Saturn's atmosphere due to tilted convection /704/445/823 /704/445/846 /119 /132 /123 /129 article |
| 作者: | Afanasyev Y.D.; Zhang Y.
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| 刊名: | Nature Geoscience
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| ISSN: | 17520894
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| 出版年: | 2018
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| 卷: | 11, 期:3 | | 起始页码: | 164
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| 结束页码: | 167
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| 语种: | 英语
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| 英文摘要: | Saturn displays cyclonic vortices at its poles and the general atmospheric circulation at other latitudes is dominated by embedded zonal jets that display cyclonic circulation. The abundance of small-scale convective storms suggests that convection plays a role in producing and maintaining Saturn's atmospheric circulation. However, the dynamical influence of small-scale convection on Saturn's general circulation is not well understood. Here we present laboratory analogue experiments and propose that Saturn's cyclonic circulation can be explained by tilted convection in which buoyancy forces do not align with the planet's rotation axis. In our experiments - conducted with a cylindrical water tank that is heated at the bottom, cooled at the top and spun on a rotating table - warm rising plumes and cold sinking water generate small anticyclonic and cyclonic vortices that are qualitatively similar to Saturn's convective storms. Numerical simulations complement the experiments and show that this small-scale convection leads to large-scale cyclonic flow at the surface and anticyclonic circulation at the base of the fluid layer, with a polar vortex forming from the merging of smaller cyclonic storms that are driven polewards. © 2018 The Author(s). |
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| 资源类型: | 期刊论文
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/105592
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| Appears in Collections: | 气候减缓与适应
科学计划与规划
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作者单位: | Memorial University of Newfoundland, Newfoundland and Labrador, St. John's, Canada
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| Recommended Citation: | |
Afanasyev Y.D.,Zhang Y.. Cyclonic circulation of Saturn's atmosphere due to tilted convection /704/445/823 /704/445/846 /119 /132 /123 /129 article[J]. Nature Geoscience,2018-01-01,11(3)
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