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DOI	10.5194/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
ISSN	19940416
EISSN	13
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
推荐引用方式 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).