气候变化领域集成服务门户(CCPortal): Submarine melt as a potential trigger of the North East Greenland Ice Stream margin retreat during Marine Isotope Stage 3

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DOI	10.5194/tc-13-1911-2019
	Submarine melt as a potential trigger of the North East Greenland Ice Stream margin retreat during Marine Isotope Stage 3
	Tabone I.; Robinson A.; Alvarez-Solas J.; Montoya M.
发表日期	2019
ISSN	19940416
EISSN	13
起始页码	1911
结束页码	1923
卷号	13 期号:7
英文摘要	The Northeast Greenland Ice Stream (NEGIS) has been suffering a significant ice mass loss during the last decades. This is partly due to increasing oceanic temperatures in the subpolar North Atlantic, which enhance submarine basal melting and mass discharge. This demonstrates the high sensitivity of this region to oceanic changes. In addition, a recent study suggested that the NEGIS grounding line was 20-40 km behind its present-day location for 15 ka during Marine Isotope Stage (MIS) 3. This is in contrast with Greenland temperature records indicating cold atmospheric conditions at that time, expected to favour ice-sheet expansion. To explain this anomalous retreat a combination of atmospheric and external forcings has been invoked. Yet, as the ocean is found to be a primary driver of the ongoing retreat of the NEGIS glaciers, the effect of past oceanic changes in their paleo evolution cannot be ruled out and should be explored in detail. Here we investigate the sensitivity of the NEGIS to the oceanic forcing during the last glacial period using a three-dimensional hybrid ice-sheet-shelf model. We find that a sufficiently high oceanic forcing could account for a NEGIS ice-margin retreat of several tens of kilometres, potentially explaining the recently proposed NEGIS grounding-line retreat during Marine Isotope Stage 3. © Author(s) 2019.
学科领域	atmospheric forcing; basal melting; discharge; glacier retreat; grounding line; ice retreat; ice sheet; ice stream; marine isotope stage; underwater environment; Arctic; Atlantic Ocean; Atlantic Ocean (North); East Greenland; Greenland
语种	英语
scopus关键词	atmospheric forcing; basal melting; discharge; glacier retreat; grounding line; ice retreat; ice sheet; ice stream; marine isotope stage; underwater environment; Arctic; Atlantic Ocean; Atlantic Ocean (North); East Greenland; Greenland
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/118859
作者单位	Universidad Complutense de Madrid, Madrid, 28040, Spain; Instituto de Geociencias, Consejo Superior de Investigaciones Cientificas, Universidad Complutense de Madrid, Madrid, 28040, Spain
推荐引用方式 GB/T 7714	Tabone I.,Robinson A.,Alvarez-Solas J.,et al. Submarine melt as a potential trigger of the North East Greenland Ice Stream margin retreat during Marine Isotope Stage 3[J],2019,13(7).
APA	Tabone I.,Robinson A.,Alvarez-Solas J.,&Montoya M..(2019).Submarine melt as a potential trigger of the North East Greenland Ice Stream margin retreat during Marine Isotope Stage 3.The Cryosphere,13(7).
MLA	Tabone I.,et al."Submarine melt as a potential trigger of the North East Greenland Ice Stream margin retreat during Marine Isotope Stage 3".The Cryosphere 13.7(2019).