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DOI | 10.1073/pnas.2000317117 |
Deep rotating convection generates the polar hexagon on Saturn | |
Yadav, Rakesh K.; Bloxham, Jeremy | |
2020-06-08 | |
发表期刊 | PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
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ISSN | 0027-8424 |
出版年 | 2020 |
卷号 | 117期号:25页码:13991-13996 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | Numerous land- and space-based observations have established that Saturn has a persistent hexagonal flow pattern near its north pole. While observations abound, the physics behind its formation is still uncertain. Although several phenomenological models have been able to reproduce this feature, a self-consistent model for how such a large-scale polygonal jet forms in the highly turbulent atmosphere of Saturn is lacking. Here, we present a three-dimensional (3D) fully nonlinear anelastic simulation of deep thermal convection in the outer layers of gas giant planets that spontaneously generates giant polar cyclones, fierce alternating zonal flows, and a high-latitude eastward jet with a polygonal pattern. The analysis of the simulation suggests that self-organized turbulence in the form of giant vortices pinches the eastward jet, forming polygonal shapes. We argue that a similar mechanism is responsible for exciting Saturn's hexagonal flow pattern. |
英文关键词 | planetary atmospheres rotating convection turbulence |
领域 | 地球科学 ; 气候变化 ; 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000546763100026 |
WOS关键词 | HIGH-LATITUDE JETS ; ZONAL FLOW ; LABORATORY MODEL ; SPHERICAL-SHELLS ; EQUATORIAL ; ATMOSPHERES ; EQUATIONS ; EASTWARD ; JUPITER ; DRIVEN |
WOS类目 | Multidisciplinary Sciences |
WOS研究方向 | Science & Technology - Other Topics |
URL | 查看原文 |
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/274427 |
专题 | 地球科学 |
作者单位 | Harvard Univ, Dept Earth & Planetary Sci, 20 Oxford St, Cambridge, MA 02138 USA |
推荐引用方式 GB/T 7714 | Yadav, Rakesh K.,Bloxham, Jeremy. Deep rotating convection generates the polar hexagon on Saturn[J]. PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,2020,117(25):13991-13996. |
APA | Yadav, Rakesh K.,&Bloxham, Jeremy.(2020).Deep rotating convection generates the polar hexagon on Saturn.PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,117(25),13991-13996. |
MLA | Yadav, Rakesh K.,et al."Deep rotating convection generates the polar hexagon on Saturn".PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA 117.25(2020):13991-13996. |
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