气候变化领域集成服务门户(CCPortal): Melt at grounding line controls observed and future retreat of Smith, Pope, and Kohler glaciers

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DOI	10.5194/tc-13-2817-2019
	Melt at grounding line controls observed and future retreat of Smith, Pope, and Kohler glaciers
	Lilien D.A.; Joughin I.; Smith B.; Gourmelen N.
发表日期	2019
ISSN	19940416
EISSN	13
起始页码	2817
结束页码	2834
卷号	13 期号:11
英文摘要	Smith, Pope, and Kohler glaciers and the corresponding Crosson and Dotson ice shelves have undergone speedup, thinning, and rapid grounding-line retreat in recent years, leaving them in a state likely conducive to future retreat. We conducted a suite of numerical model simulations of these glaciers and compared the results to observations to determine the processes controlling their recent evolution. The model simulations indicate that the state of these glaciers in the 1990s was not inherently unstable, i.e., that small perturbations to the grounding line would not necessarily have caused the large retreat that has been observed. Instead, sustained, elevated melt at the grounding line was needed to cause the observed retreat. Weakening of the margins of Crosson Ice Shelf may have hastened the onset of grounding-line retreat but is unlikely to have initiated these rapid changes without an accompanying increase in melt. In the simulations that most closely match the observed thinning, speedup, and retreat, modeled grounding-line retreat and ice loss continue unabated throughout the 21st century, and subsequent retreat along Smith Glacier's trough appears likely. Given the rapid progression of grounding-line retreat in the model simulations, thinning associated with the retreat of Smith Glacier may reach the ice divide and undermine a portion of the Thwaites catchment as quickly as changes initiated at the Thwaites terminus. © 2019 BMJ Publishing Group. All rights reserved.
学科领域	catchment; glacier retreat; grounding line; ice shelf; numerical model; Antarctica; Smith Glacier; West Antarctica
语种	英语
scopus关键词	catchment; glacier retreat; grounding line; ice shelf; numerical model; Antarctica; Smith Glacier; West Antarctica
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/118817
作者单位	Applied Physics Laboratory, University of Washington, Seattle, WA, United States; Department of Earth and Space Sciences, University of Washington, Seattle, WA, United States; School of Geosciences, University of Edinburgh, Edinburgh, United Kingdom
推荐引用方式 GB/T 7714	Lilien D.A.,Joughin I.,Smith B.,et al. Melt at grounding line controls observed and future retreat of Smith, Pope, and Kohler glaciers[J],2019,13(11).
APA	Lilien D.A.,Joughin I.,Smith B.,&Gourmelen N..(2019).Melt at grounding line controls observed and future retreat of Smith, Pope, and Kohler glaciers.The Cryosphere,13(11).
MLA	Lilien D.A.,et al."Melt at grounding line controls observed and future retreat of Smith, Pope, and Kohler glaciers".The Cryosphere 13.11(2019).