Evolution into the stagnant lid convection regime with a non-Newtonian water ice rheology

被引：5

作者：

Freeman, J

Moresi, L

May, DA

机构：

[1] Monash Univ, Sch Math Sci, Clayton, Vic 33800, Australia

[2] Victorian Partnership Adv Comp, Carlton, Vic, Australia

来源：

GEOPHYSICAL RESEARCH LETTERS | 2004年 / 31卷 / 11期

关键词：

D O I：

10.1029/2004GL019798

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

[ 1] We study and compare the evolution into the stagnant lid regime with a non-Newtonian water ice and a silicate rheology by solving the equations of thermal convection. Dislocation creep of water ice is characterized by a larger stress dependence ( n = 4) than silicates ( n = 3) and with this water ice rheology, the stagnant lid regime is attained at a temperature determined viscosity contrast greater than 10 10 and at an effective viscosity contrast of -10 5. We also determine a Nusselt-Rayleigh number scaling law for the n = 4 rheology.

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页码：L117011 / 4

页数：4

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