气候变化领域集成服务门户(CCPortal): Getz Ice Shelf melt enhanced by freshwater discharge from beneath the West Antarctic Ice Sheet

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DOI	10.5194/tc-14-1399-2020
	Getz Ice Shelf melt enhanced by freshwater discharge from beneath the West Antarctic Ice Sheet
	Wei W.; Blankenship D.D.; Greenbaum J.S.; Gourmelen N.; Dow C.F.; Richter T.G.; Greene C.A.; Young D.A.; Lee S.; Kim T.-W.; Lee W.S.; Assmann K.M.
发表日期	2020
ISSN	19940416
起始页码	1399
结束页码	1408
卷号	14 期号:4
英文摘要	Antarctica's Getz Ice Shelf has been rapidly thinning in recent years, producing more meltwater than any other ice shelf in the world. The influx of fresh water is known to substantially influence ocean circulation and biological productivity, but relatively little is known about the factors controlling basal melt rate or how basal melt is spatially distributed beneath the ice shelf. Also unknown is the relative importance of subglacial discharge from the grounded ice sheet in contributing to the export of fresh water from the ice shelf cavity. Here we compare the observed spatial distribution of basal melt rate to a new sub-ice-shelf bathymetry map inferred from airborne gravity surveys and to locations of subglacial discharge from the grounded ice sheet. We find that melt rates are high where bathymetric troughs provide a pathway for warm Circumpolar Deep Water to enter the ice shelf cavity and that melting is enhanced where subglacial discharge fresh water flows across the grounding line. This is the first study to address the relative importance of meltwater production of the Getz Ice Shelf from both ocean and subglacial sources. © 2020 Author(s).
英文关键词	estuarine front; freshwater; ice sheet; ice shelf; meltwater; oceanic circulation; spatial distribution; Antarctic Ice Sheet; Antarctica; Getz Ice Shelf; West Antarctic Ice Sheet; West Antarctica
语种	英语
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/202243
作者单位	Institute for Geophysics, Department of Geological Sciences, Jackson School of Geosciences, University of Texas at Austin, Austin, TX, United States; School of GeoSciences, University of Edinburgh, Edinburgh, United Kingdom; Department of Geography and Environmental Management, University of Waterloo, Waterloo, ON, Canada; Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, United States; Korea Polar Research Institute, Incheon, South Korea; Department of Earth Sciences, University of Gothenburg, Gothenburg, Sweden; Institute of Marine Research, Tromsø, Norway
推荐引用方式 GB/T 7714	Wei W.,Blankenship D.D.,Greenbaum J.S.,et al. Getz Ice Shelf melt enhanced by freshwater discharge from beneath the West Antarctic Ice Sheet[J],2020,14(4).
APA	Wei W..,Blankenship D.D..,Greenbaum J.S..,Gourmelen N..,Dow C.F..,...&Assmann K.M..(2020).Getz Ice Shelf melt enhanced by freshwater discharge from beneath the West Antarctic Ice Sheet.Cryosphere,14(4).
MLA	Wei W.,et al."Getz Ice Shelf melt enhanced by freshwater discharge from beneath the West Antarctic Ice Sheet".Cryosphere 14.4(2020).