气候变化领域集成服务门户(CCPortal): Connected subglacial lake drainage beneath Thwaites Glacier, West Antarctica

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DOI	10.5194/tc-11-451-2017
	Connected subglacial lake drainage beneath Thwaites Glacier, West Antarctica
	Smith B.E.; Gourmelen N.; Huth A.; Joughin I.
发表日期	2017
ISSN	19940416
卷号	11 期号:1
英文摘要	We present conventional and swath altimetry data from CryoSat-2, revealing a system of subglacial lakes that drained between June 2013 and January 2014 under the central part of Thwaites Glacier, West Antarctica (TWG). Much of the drainage happened in less than 6 months, with an apparent connection between three lakes spanning more than 130 km. Hydro-potential analysis of the glacier bed shows a large number of small closed basins that should trap water produced by subglacial melt, although the observed large-scale motion of water suggests that water can sometimes locally move against the apparent potential gradient, at least during lake-drainage events. This shows that there are important limitations in the ability of hydro-potential maps to predict subglacial water flow. An interpretation based on a map of the melt rate suggests that lake drainages of this type should take place every 20-80 years, depending on the connectivity of the water flow at the bed. Although we observed an acceleration in the downstream part of TWG immediately before the start of the lake drainage, there is no clear connection between the drainage and any speed change of the glacier. © Author(s) 2017.
学科领域	acceleration; connectivity; CryoSat; drainage; glacial lake; glacier; glacier flow; meltwater; satellite altimetry; subglacial environment; water flow; Antarctica; Thwaites Glacier; West Antarctica
语种	英语
scopus关键词	acceleration; connectivity; CryoSat; drainage; glacial lake; glacier; glacier flow; meltwater; satellite altimetry; subglacial environment; water flow; Antarctica; Thwaites Glacier; West Antarctica
来源期刊	Cryosphere
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/119442
作者单位	Applied Physics Lab, University of Washington, Seattle, WA 98195, United States; School of Geosciences, University of Edinburgh, Edinburgh, EH8, United Kingdom; IPGS UMR 7516, Université de Strasbourg, CNRS, Strasbourg, France; Department of Earth and Space Sciences, University of Washington, Seattle, WA 98195, United States
推荐引用方式 GB/T 7714	Smith B.E.,Gourmelen N.,Huth A.,et al. Connected subglacial lake drainage beneath Thwaites Glacier, West Antarctica[J],2017,11(1).
APA	Smith B.E.,Gourmelen N.,Huth A.,&Joughin I..(2017).Connected subglacial lake drainage beneath Thwaites Glacier, West Antarctica.Cryosphere,11(1).
MLA	Smith B.E.,et al."Connected subglacial lake drainage beneath Thwaites Glacier, West Antarctica".Cryosphere 11.1(2017).