气候变化领域集成服务门户(CCPortal): Delicate seafloor landforms reveal past Antarctic grounding-line retreat of kilometers per year

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DOI	10.1126/science.aaz3059
	Delicate seafloor landforms reveal past Antarctic grounding-line retreat of kilometers per year
	Dowdeswell J.A.; Batchelor C.L.; Montelli A.; Ottesen D.; Christie F.D.W.; Dowdeswell E.K.; Evans J.
发表日期	2020
ISSN	0036-8075
起始页码	1020
结束页码	1024
卷号	368 期号:6494
英文摘要	A suite of grounding-line landforms on the Antarctic seafloor, imaged at submeter horizontal resolution from an autonomous underwater vehicle, enables calculation of ice sheet retreat rates from a complex of grounding-zone wedges on the Larsen continental shelf, western Weddell Sea. The landforms are delicate sets of up to 90 ridges, <1.5 meters high and spaced 20 to 25 meters apart. We interpret these ridges as the product of squeezing up of soft sediment during the rise and fall of the retreating ice sheet grounding line during successive tidal cycles. Grounding-line retreat rates of 40 to 50 meters per day (>10 kilometers per year) are inferred during regional deglaciation of the Larsen shelf. If repeated today, such rapid mass loss to the ocean would have clear implications for increasing the rate of global sea level rise. © 2020 American Association for the Advancement of Science. All rights reserved.
英文关键词	deglaciation; glacial landform; glacier retreat; global ocean; grounding line; landform; seafloor; tidal cycle; Antarctica; article; body weight; calculation; continental shelf; deglaciation; ice sheet; sea level rise; sediment; Weddell Sea; Antarctica; Larsen Ice Shelf; Southern Ocean; Weddell Sea; 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/243568
作者单位	Scott Polar Research Institute, University of Cambridge, Cambridge, United Kingdom; Norwegian University of Science and Technology, Trondheim, Norway; Geological Survey of Norway, Trondheim, Norway; Department of Geography, Loughborough University, Loughborough, United Kingdom
推荐引用方式 GB/T 7714	Dowdeswell J.A.,Batchelor C.L.,Montelli A.,et al. Delicate seafloor landforms reveal past Antarctic grounding-line retreat of kilometers per year[J],2020,368(6494).
APA	Dowdeswell J.A..,Batchelor C.L..,Montelli A..,Ottesen D..,Christie F.D.W..,...&Evans J..(2020).Delicate seafloor landforms reveal past Antarctic grounding-line retreat of kilometers per year.Science,368(6494).
MLA	Dowdeswell J.A.,et al."Delicate seafloor landforms reveal past Antarctic grounding-line retreat of kilometers per year".Science 368.6494(2020).