DOI: 10.1016/j.epsl.2018.08.012
Scopus记录号: 2-s2.0-85051412780
论文题名: Can libration maintain Enceladus's ocean?
作者: Wilson A. ; Kerswell R.R.
刊名: Earth and Planetary Science Letters
ISSN: 0012821X
出版年: 2018
卷: 500 起始页码: 41
结束页码: 46
语种: 英语
英文关键词: dissipation
; libration
; turbulence
Scopus关键词: Energy dissipation
; Heat flux
; Interplanetary flight
; Oceanography
; Turbulence
; Driving effect
; Flow response
; Ice shells
; libration
; Sub-surface ocean
; Tidal interactions
; Upper Bound
; Viscous dissipation rate
; Ice
; crustal structure
; dissipation
; heat flux
; turbulence
; turbulent flow
英文摘要: The process by which the subsurface ocean on Enceladus is heated remains a puzzle. Tidal interaction with Saturn and Dione is the leading candidate but whether the dominant heating occurs in the solid core, ice crust or in the ocean itself is an outstanding question. Here we consider the driving effect of the longitudinal libration of the ice crust on the subsurface ocean and argue that the flow response should be turbulent even in the most benign situation of a smooth spherical ice shell when the motion of the boundary is only transmitted viscously. A rigorous upper bound on the turbulent viscous dissipation rate is then derived and used to argue that libration should be potent enough to explain the observed heat flux emanating out of Enceladus when the effects of tidal distortion and roughness of the ice crust are included. © 2018 Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/109695
Appears in Collections: 影响、适应和脆弱性 气候变化事实与影响
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作者单位: School of Mathematics, University of Bristol, Bristol, BS8 1TW, United Kingdom; DAMTP, Centre for Mathematical Sciences, University of Cambridge, Cambridge, CB3 0WA, United Kingdom
Recommended Citation:
Wilson A.,Kerswell R.R.. Can libration maintain Enceladus's ocean?[J]. Earth and Planetary Science Letters,2018-01-01,500