| DOI: | 10.1002/2016GL070650
|
| 论文题名: | Enceladus's and Dione's floating ice shells supported by minimum stress isostasy |
| 作者: | Beuthe M.; Rivoldini A.; Trinh A.
|
| 刊名: | Geophysical Research Letters
|
| ISSN: | 0094-8528
|
| EISSN: | 1944-8259
|
| 出版年: | 2016
|
| 卷: | 43, 期:19 | | 起始页码: | 10088
|
| 结束页码: | 10096
|
| 语种: | 英语
|
| 英文关键词: | crust
; Dione
; Enceladus
; gravity
; isostasy
; subsurface ocean
|
| Scopus关键词: | Geodesy
; Gravitation
; Oceanography
; Crust
; Dione
; Enceladus
; Isostasy
; Sub-surface ocean
; Shells (structures)
|
| 英文摘要: | Enceladus's gravity and shape have been explained in terms of a thick isostatic ice shell floating on a global ocean, in contradiction of the thin shell implied by librations. Here we propose a new isostatic model minimizing crustal deviatoric stress and demonstrate that gravity and shape data predict a 38 ± 4 km thick ocean beneath a 23 ± 4 km thick shell agreeing with—but independent of—libration data. Isostatic and tidal stresses are comparable in magnitude. South polar crust is only 7 ± 4 km thick, facilitating the opening of water conduits and enhancing tidal dissipation through stress concentration. Enceladus's resonant companion, Dione, is in a similar state of minimum stress isostasy. Its gravity and shape can be explained in terms of a 99 ± 23 km thick isostatic shell overlying a 65 ± 30 km thick global ocean, thus providing the first clear evidence for a present-day ocean within Dione. ©2016. American Geophysical Union. All Rights Reserved. |
| URL: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84990940886&doi=10.1002%2f2016GL070650&partnerID=40&md5=d4b70ecb698a9ae9065bd6b7700a1115
|
| Citation statistics: |
|
| 资源类型: | 期刊论文
|
| 标识符: | http://119.78.100.158/handle/2HF3EXSE/9491
|
| Appears in Collections: | 科学计划与规划
气候变化与战略
|
|
There are no files associated with this item.
|
|
作者单位: | Royal Observatory of Belgium, Brussels, Belgium
|
| Recommended Citation: | |
Beuthe M.,Rivoldini A.,Trinh A.. Enceladus's and Dione's floating ice shells supported by minimum stress isostasy[J]. Geophysical Research Letters,2016-01-01,43(19).
|
|
|