| DOI: | 10.1038/ngeo2459
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| 论文题名: | Polar vortex formation in giant-planet atmospheres due to moist convection |
| 作者: | O'Neill M.E.; Emanuel K.A.; Flierl G.R.
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| 刊名: | Nature Geoscience
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| ISSN: | 17520894
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| 出版年: | 2015
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| 卷: | 8, 期:7 | | 起始页码: | 523
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| 结束页码: | 526
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| 语种: | 英语
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| 英文摘要: | A strong cyclonic vortex has been observed on each of Saturnâ €™ s poles, coincident with a local maximum in observed tropospheric temperature. Neptune also exhibits a relatively warm, although much more transient, region on its south pole. Whether similar features exist on Jupiter will be resolved by the 2016 Juno mission. Energetic, small-scale storm-like features that originate from the water-cloud level or lower have been observed on each of the giant planets and attributed to moist convection, suggesting that these storms play a significant role in global heat transfer from the hot interior to space. Nevertheless, the creation and maintenance of Saturnâ €™ s polar vortices, and their presence or absence on the other giant planets, are not understood. Here we use simulations with a shallow-water model to show that storm generation, driven by moist convection, can create a strong polar cyclone throughout the depth of a planetâ €™ s troposphere. We find that the type of shallow polar flow that occurs on a giant planet can be described by the size ratio of small eddies to the planetary radius and the energy density of its atmosphere due to latent heating from moist convection. We suggest that the observed difference in these parameters between Saturn and Jupiter may preclude a Jovian polar cyclone. © 2015 Macmillan Publishers Limited. All rights reserved. |
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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/106301
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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: | Program in Atmospheres Oceans and Climate, Massachusetts Institute of Technology, Cambridge, MA, United States
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| Recommended Citation: | |
O'Neill M.E.,Emanuel K.A.,Flierl G.R.. Polar vortex formation in giant-planet atmospheres due to moist convection[J]. Nature Geoscience,2015-01-01,8(7)
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