Scopus记录号: 2-s2.0-85060383531
论文题名: Sensitivity of centennial mass loss projections of the Amundsen basin to the friction law
作者: Brondex J. ; Gillet-Chaulet F. ; Gagliardini O.
刊名: Cryosphere
ISSN: 19940416
出版年: 2019
卷: 13, 期: 1 起始页码: 177
结束页码: 195
语种: 英语
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. 资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/122690
Appears in Collections: 气候变化事实与影响
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作者单位: Univ. Grenoble Alpes, CNRS, IRD, Grenoble, 38000, France
Recommended Citation:
Brondex J.,Gillet-Chaulet F.,Gagliardini O.. Sensitivity of centennial mass loss projections of the Amundsen basin to the friction law[J]. Cryosphere,2019-01-01,13(1)