气候变化领域集成服务门户(CCPortal): Transition to marine ice cliff instability controlled by ice thickness gradients and velocity

CCPortal

DOI	10.1126/science.abf6271
	Transition to marine ice cliff instability controlled by ice thickness gradients and velocity
	Bassis J.N.; Berg B.; Crawford A.J.; Benn D.I.
发表日期	2021
ISSN	0036-8075
起始页码	1342
结束页码	1344
卷号	372 期号:6548
英文摘要	Portions of ice sheets grounded deep beneath sea level can disintegrate if tall ice cliffs at the ice-ocean boundary start to collapse under their own weight. This process, called marine ice cliff instability, could lead to catastrophic retreat of sections of West Antarctica on decadal-to-century time scales. Here we use a model that resolves flow and failure of ice to show that dynamic thinning can slow or stabilize cliff retreat, but when ice thickness increases rapidly upstream from the ice cliff, there is a transition to catastrophic collapse. However, even if vulnerable locations like Thwaites Glacier start to collapse, small resistive forces from sea-ice and calved debris can slow down or arrest retreat, reducing the potential for sustained ice sheet collapse. © 2021 American Association for the Advancement of Science. All rights reserved.
英文关键词	ice; water; cliff; collapse; ice retreat; ice sheet; ice thickness; ice-dammed lake; ice-ocean interaction; sea ice; sea level change; Article; glacier; physical stress; thickness; velocity; water depth; Antarctica; Thwaites Glacier; West Antarctica
语种	英语
来源期刊	Science
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/242976
作者单位	Department of Climate and Space Science and Engineering, University of Michigan, Ann Arbor, MI 48109, United States; Department of Physics, University of Michigan, Ann Arbor, MI 48109, United States; School of Geography and Sustainable Development, University of St Andrews, St Andrews, KY16 9AL, United Kingdom
推荐引用方式 GB/T 7714	Bassis J.N.,Berg B.,Crawford A.J.,et al. Transition to marine ice cliff instability controlled by ice thickness gradients and velocity[J],2021,372(6548).
APA	Bassis J.N.,Berg B.,Crawford A.J.,&Benn D.I..(2021).Transition to marine ice cliff instability controlled by ice thickness gradients and velocity.Science,372(6548).
MLA	Bassis J.N.,et al."Transition to marine ice cliff instability controlled by ice thickness gradients and velocity".Science 372.6548(2021).