气候变化领域集成服务门户(CCPortal): Marine ice-cliff instability modeling shows mixed-mode ice-cliff failure and yields calving rate parameterization

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DOI	10.1038/s41467-021-23070-7
	Marine ice-cliff instability modeling shows mixed-mode ice-cliff failure and yields calving rate parameterization
	Crawford A.J.; Benn D.I.; Todd J.; Åström J.A.; Bassis J.N.; Zwinger T.
发表日期	2021
ISSN	2041-1723
卷号	12 期号:1
英文摘要	Marine ice-cliff instability could accelerate ice loss from Antarctica, and according to some model predictions could potentially contribute >1 m of global mean sea level rise by 2100 at current emission rates. Regions with over-deepening basins >1 km in depth (e.g., the West Antarctic Ice Sheet) are particularly susceptible to this instability, as retreat could expose increasingly tall cliffs that could exceed ice stability thresholds. Here, we use a suite of high-fidelity glacier models to improve understanding of the modes through which ice cliffs can structurally fail and derive a conservative ice-cliff failure retreat rate parameterization for ice-sheet models. Our results highlight the respective roles of viscous deformation, shear-band formation, and brittle-tensile failure within marine ice-cliff instability. Calving rates increase non-linearly with cliff height, but runaway ice-cliff retreat can be inhibited by viscous flow and back force from iceberg mélange. © 2021, The Author(s).
语种	英语
scopus关键词	brittle failure; cliff; crop yield; failure analysis; glacier dynamics; ice retreat; iceberg; iceberg calving; marine environment; numerical model; parameterization; sea level change; threshold; article; glacier; ice sheet; iceberg; Antarctic Ice Sheet; Antarctica; West Antarctic Ice Sheet; West Antarctica
来源期刊	Nature Communications
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/251454
作者单位	School of Geography and Sustainable Development, University of St Andrews, St Andrews, United Kingdom; School of GeoSciences, The University of Edinburgh, Edinburgh, United Kingdom; CSC – IT Center for Science, Espoo, Finland; Department of Climate and Space Sciences and Engineering, University of Michigan, Ann Arbor, MI, United States
推荐引用方式 GB/T 7714	Crawford A.J.,Benn D.I.,Todd J.,et al. Marine ice-cliff instability modeling shows mixed-mode ice-cliff failure and yields calving rate parameterization[J],2021,12(1).
APA	Crawford A.J.,Benn D.I.,Todd J.,Åström J.A.,Bassis J.N.,&Zwinger T..(2021).Marine ice-cliff instability modeling shows mixed-mode ice-cliff failure and yields calving rate parameterization.Nature Communications,12(1).
MLA	Crawford A.J.,et al."Marine ice-cliff instability modeling shows mixed-mode ice-cliff failure and yields calving rate parameterization".Nature Communications 12.1(2021).