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DOI10.5194/tc-13-177-2019
Sensitivity of centennial mass loss projections of the Amundsen basin to the friction law
Brondex J.; Gillet-Chaulet F.; Gagliardini O.
发表日期2019
ISSN19940416
EISSN13
起始页码177
结束页码195
卷号13期号:1
英文摘要Reliable projections of ice sheets' future contributions to sea-level rise require models that are able to accurately simulate grounding-line dynamics, starting from initial states consistent with observations. Here, we simulate the centennial evolution of the Amundsen Sea Embayment in response to a prescribed perturbation in order to assess the sensitivity of mass loss projections to the chosen friction law, depending on the initialisation strategy. To this end, three different model states are constructed by inferring both the initial basal shear stress and viscosity fields with various relative weights. Then, starting from each of these model states, prognostic simulations are carried out using a Weertman, a Schoof and a Budd friction law, with different parameter values. Although the sensitivity of projections to the chosen friction law tends to decrease when more weight is put on viscosity during initialisation, it remains significant for the most physically acceptable of the constructed model states. Independently of the considered model state, the Weertman law systematically predicts the lowest mass losses. In addition, because of its particular dependence on effective pressure, the Budd friction law induces significantly different grounding-line retreat patterns than the other laws and predicts significantly higher mass losses. © Author(s) 2019.
学科领域friction; glacier mass balance; glacier retreat; grounding line; ice sheet; perturbation; sea level change; sensitivity analysis; shear stress; viscosity; Amundsen Sea; Southern Ocean
语种英语
scopus关键词friction; glacier mass balance; glacier retreat; grounding line; ice sheet; perturbation; sea level change; sensitivity analysis; shear stress; viscosity; Amundsen Sea; Southern Ocean
来源期刊The Cryosphere
文献类型期刊论文
条目标识符http://gcip.llas.ac.cn/handle/2XKMVOVA/118946
作者单位Univ. Grenoble Alpes, CNRS, IRD, Grenoble, 38000, France
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GB/T 7714
Brondex J.,Gillet-Chaulet F.,Gagliardini O.. Sensitivity of centennial mass loss projections of the Amundsen basin to the friction law[J],2019,13(1).
APA Brondex J.,Gillet-Chaulet F.,&Gagliardini O..(2019).Sensitivity of centennial mass loss projections of the Amundsen basin to the friction law.The Cryosphere,13(1).
MLA Brondex J.,et al."Sensitivity of centennial mass loss projections of the Amundsen basin to the friction law".The Cryosphere 13.1(2019).
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