The Deformational Response of a Viscoelastic Solid Earth Model Coupled to a Thermomechanical Ice Sheet Model
The Deformational Response of a Viscoelastic Solid Earth Model Coupled to a Thermomechanical Ice Sheet Model
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粘弹性固体地球模型与热机械冰盖模型耦合的变形响应
DOI:
10.1007/s10712-013-9257-8
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发表时间:
2014
影响因子:
4.6
通讯作者:
Z. Martinec
中科院分区:
文献类型:
--
作者:
Konrad;M. Thoma;I. Sasgen;V. Klemann;D. Barbi;K. Grosfeld;Z. Martinec
We apply a coupled thermomechanical ice sheet—self-gravitating viscoelastic solid Earth model (SGVEM), allowing for the dynamic exchange of ice thickness and bedrock deformation, in order to investigate the effect of viscoelastic deformation on ice dynamics and vice versa. In a synthetic glaciation scenario, we investigate the interaction between the ice sheet and the solid Earth deformation, the glacial-isostatic adjustment (GIA), accounting for an atmospheric forcing depending on the ice sheet surface altitude. We compare the results from the coupled model to runs with the common elastic lithosphere/relaxing asthenosphere (ELRA) model, where the lithosphere is represented by a thin plate and the mantle relaxes with one characteristic relaxation time, as well as to a rigid Earth without any deformation. We find that the deformational behaviour of the SGVEM on ice dynamics (i.e. stored ice volume, ice thickness and velocity field) is comparable to the ELRA for an optimal choice of the parameters in steady state, but exhibits differences in the transient behaviour. Beyond the ice sheet, in the region of peripheral forebulge, the differences in the transient surface deformation between ELRA and SGVEM are substantial, demonstrating the inadequacy of the ELRA model for interpreting constraints on GIA in the periphery of the ice sheet, such as sea-level indicators and GPS uplift rates.
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影响因子:
3.4
作者:
A. Payne;P. Huybrechts;A. Abe‐Ouchi;R. Calov;J. Fastook;R. Greve;S. Marshall;I. Marsiat;C. Ritz
通讯作者:
A. Payne;P. Huybrechts;A. Abe‐Ouchi;R. Calov;J. Fastook;R. Greve;S. Marshall;I. Marsiat;C. Ritz
DOI:
--
发表时间:
2004
期刊:
影响因子:
--
作者:
R. Sabadini
通讯作者:
R. Sabadini
影响因子:
--
作者:
J. F. Brotchie;R. Silvester
通讯作者:
R. Silvester
影响因子:
2.9
作者:
M. Thoma;K. Grosfeld;C. Mayer;F. Pattyn
通讯作者:
F. Pattyn
DOI:
--
发表时间:
2011
期刊:
影响因子:
--
作者:
N. Gomez;D. Pollard;J. Mitrovica;P. Huybers;P. Clark
通讯作者:
P. Clark