气候变化领域集成服务门户(CCPortal): Rapid Viscoelastic Deformation Slows Marine Ice Sheet Instability at Pine Island Glacier

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DOI	10.1029/2019GL086446
	Rapid Viscoelastic Deformation Slows Marine Ice Sheet Instability at Pine Island Glacier
	Kachuck S.B.; Martin D.F.; Bassis J.N.; Price S.F.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:10
英文摘要	The ice sheets of the Amundsen Sea Embayment (ASE) are vulnerable to the marine ice sheet instability (MISI), which could cause irreversible collapse and raise sea levels by over a meter. The uncertain timing and scale of this collapse depend on the complex interaction between ice, ocean, and bedrock dynamics. The mantle beneath the ASE is likely less viscous (∼1018 Pa s) than the Earth's average mantle (∼1021 Pa s). Here we show that an effective equilibrium between Pine Island Glacier's retreat and the response of a weak viscoelastic mantle can reduce ice mass lost by almost 30% over 150 years. Other components of solid Earth response—purely elastic deformations and geoid perturbations—provide less stability than the viscoelastic response alone. Uncertainties in mantle rheology, topography, and basal melt affect how much stability we expect, if any. Our study indicates the importance of considering viscoelastic uplift during the rapid retreat associated with MISI. © 2020. American Geophysical Union. All Rights Reserved.
英文关键词	Deformation; Glaciers; Sea level; Stability; Topography; Viscoelasticity; Amundsen Sea; Ice mass; Ice sheet; Mantle rheology; Pine island glaciers; Solid earth; Viscoelastic deformation; Viscoelastic response; Ice; basal melting; bedrock; deformation mechanism; geoid; ice sheet; mantle; rheology; sea ice; sea level; topology; viscoelasticity; viscosity; Amundsen Sea; Antarctica; Pine Island Glacier; Southern Ocean; West Antarctica
语种	英语
来源期刊	Geophysical Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/170328
作者单位	Climate and Space Sciences and Engineering, University of Michigan, Ann Arbor, MI, United States; Applied Numerical Algorithms Group, Lawrence Berkeley National Laboratory, Berkeley, CA, United States; Fluid Dynamics and Solid Mechanics Group, Los Alamos National Laboratory, Los Alamos, NM, United States
推荐引用方式 GB/T 7714	Kachuck S.B.,Martin D.F.,Bassis J.N.,et al. Rapid Viscoelastic Deformation Slows Marine Ice Sheet Instability at Pine Island Glacier[J],2020,47(10).
APA	Kachuck S.B.,Martin D.F.,Bassis J.N.,&Price S.F..(2020).Rapid Viscoelastic Deformation Slows Marine Ice Sheet Instability at Pine Island Glacier.Geophysical Research Letters,47(10).
MLA	Kachuck S.B.,et al."Rapid Viscoelastic Deformation Slows Marine Ice Sheet Instability at Pine Island Glacier".Geophysical Research Letters 47.10(2020).