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DOI | 10.1073/pnas.2001648117 |
Spontaneous formation of geysers at only one pole on Enceladus's ice shell | |
Kang, Wanying; Flierl, Glenn | |
2020-06-16 | |
发表期刊 | PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA |
ISSN | 0027-8424 |
出版年 | 2020 |
卷号 | 117期号:26页码:14764-14768 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | The ice shell on Enceladus, an icy moon of Saturn, exhibits strong asymmetry between the northern and southern hemispheres, with all known geysers concentrated over the south pole, even though the expected pattern of tidal forced deformation should be symmetric between the north and south poles. Using an idealized ice-evolution model, we demonstrate that this asymmetry may form spontaneously, without any noticeable a priori asymmetry (such as a giant impact or a monopole structure of geological activity), in contrast to previous studies. Infinitesimal asymmetry in the ice shell thickness due to random perturbations are found to be able to grow indefinitely, ending up significantly thinning the ice shell at one of the poles, thereby allowing fracture formation there. Necessary conditions to trigger this hemispheric symmetry-breaking mechanism are found analytically. A rule of thumb we find is that, for Galilean and Saturnian icy moons, the ice shell can undergo hemispheric symmetry breaking only if the mean shell thickness is around 10 to 30 km. |
英文关键词 | Enceladus icy moon planetary science |
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:000548160900001 |
WOS关键词 | TIDAL DISSIPATION ; SUBSURFACE OCEAN ; SOUTH-POLE ; SATELLITES ; CONSTRAINTS ; CONVECTION ; OBLIQUITY ; GRAVITY ; WANDER ; ORIGIN |
WOS类目 | Multidisciplinary Sciences |
WOS研究方向 | Science & Technology - Other Topics |
URL | 查看原文 |
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文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/276656 |
专题 | 地球科学 |
作者单位 | MIT, Dept Earth Atmospher & Planetary Sci, Cambridge, MA 02139 USA |
推荐引用方式 GB/T 7714 | Kang, Wanying,Flierl, Glenn. Spontaneous formation of geysers at only one pole on Enceladus's ice shell[J]. PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,2020,117(26):14764-14768. |
APA | Kang, Wanying,&Flierl, Glenn.(2020).Spontaneous formation of geysers at only one pole on Enceladus's ice shell.PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,117(26),14764-14768. |
MLA | Kang, Wanying,et al."Spontaneous formation of geysers at only one pole on Enceladus's ice shell".PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA 117.26(2020):14764-14768. |
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