气候变化领域集成服务门户(CCPortal): Deglaciation and future stability of the Coats Land ice margin, Antarctica

CCPortal

DOI	10.5194/tc-12-2383-2018
	Deglaciation and future stability of the Coats Land ice margin, Antarctica
	Hodgson D.A.; Hogan K.; Smith J.M.; Smith J.A.; Hillenbrand C.-D.; Graham A.G.C.; Fretwell P.; Allen C.; Peck V.; Arndt J.-E.; Dorschel B.; Höbscher C.; Smith A.M.; Larter R.
发表日期	2018
ISSN	19940416
卷号	12 期号:7
英文摘要	The East Antarctic Ice Sheet discharges into the Weddell Sea via the Coats Land ice margin. We have used geophysical data to determine the changing ice-sheet configuration in this region through its last glacial advance and Holocene retreat and to identify constraints on its future stability. Methods included high-resolution multibeam bathymetry, sub-bottom profiles, seismic-reflection profiles, sediment core analysis and satellite altimetry. These provide evidence that Coats Land glaciers and ice streams merged with the palaeo-Filchner Ice Stream during the last glacial advance. Retreat of this ice stream from 12 848 to 8351 cal. yr BP resulted in its progressive southwards decoupling from Coats Land outlet glaciers. Moraines and grounding-zone wedges document the subsequent retreat and thinning of these glaciers, their loss of contact with the bed and the formation of ice shelves, which re-Advanced to pinning points on topographic highs at the distal end of the troughs. Once fully detached from the bed, these ice shelves were predisposed to rapid retreat back to coastal grounding lines. This was due to reverse-bed slopes, the consequent absence of further pinning points in the troughs and potentially to the loss of structural integrity resulting from weaknesses inherited at the grounding line. These processes explain why there are no large ice shelves in the eastern Weddell Sea between 75.5 and 77° S. . © Author(s) 2018.
学科领域	deglaciation; future prospect; glacier advance; glacier retreat; grounding line; Holocene; ice margin; ice sheet; ice shelf; ice stream; Last Glacial; satellite altimetry; Antarctic Ice Sheet; Antarctica; Coats Land; East Antarctic Ice Sheet; East Antarctica; Southern Ocean; Weddell Sea
语种	英语
scopus关键词	deglaciation; future prospect; glacier advance; glacier retreat; grounding line; Holocene; ice margin; ice sheet; ice shelf; ice stream; Last Glacial; satellite altimetry; Antarctic Ice Sheet; Antarctica; Coats Land; East Antarctic Ice Sheet; East Antarctica; Southern Ocean; Weddell Sea
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/119099
作者单位	British Antarctic Survey, High Cross, Madingley Road, Cambridge, CB3 0ET, United Kingdom; Department of Geography, University of Durham, Durham, DH1 3LE, United Kingdom; Department of Geography, University of Exeter, Exeter, EX4 4RJ, United Kingdom; Alfred Wegener Institute Van-Ronzelen-Str. 2, Bremerhaven, 27568, Germany; Institute of Geophysics, University of Hamburg, Bundesstr. 55, Hamburg, 20146, Germany
推荐引用方式 GB/T 7714	Hodgson D.A.,Hogan K.,Smith J.M.,et al. Deglaciation and future stability of the Coats Land ice margin, Antarctica[J],2018,12(7).
APA	Hodgson D.A..,Hogan K..,Smith J.M..,Smith J.A..,Hillenbrand C.-D..,...&Larter R..(2018).Deglaciation and future stability of the Coats Land ice margin, Antarctica.Cryosphere,12(7).
MLA	Hodgson D.A.,et al."Deglaciation and future stability of the Coats Land ice margin, Antarctica".Cryosphere 12.7(2018).