Tidal dissipation in creeping ice and the thermal evolution of Europa
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- 作者：Christine McCarthya ; mccarthy@ldeo.columbia.edu" class="auth_mail" title="E-mail the corresponding author ; Reid F. Cooperb
- 关键词：ice ; attenuation ; dislocations ; icy satellites ; microstructure ; anelasticity
- 刊名：Earth and Planetary Science Letters
- 出版年：2016
- 出版时间：1 June 2016
- 年：2016
- 卷：443
- 期：Complete
- 页码：185-194
- 全文大小：1460 K
文摘
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Our experiments on deforming ice show dissipation greater than predicted by viscoelastic models.
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The attenuation is modestly nonlinear (strain-amplitude dependent) and independent of grain size.
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Grain size-independent attenuation represents a paradigm shift in how lab data are extrapolated.
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When creep involves dislocations, the substructure and spatial interactions control attenuation.