气候变化领域集成服务门户(CCPortal): Persistent tracers of historic ice flow in glacial stratigraphy near Kamb Ice Stream, West Antarctica

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DOI	10.5194/tc-12-2821-2018
	Persistent tracers of historic ice flow in glacial stratigraphy near Kamb Ice Stream, West Antarctica
	Holschuh N.; Christianson K.; Conway H.; Jacobel R.W.; Welch B.C.
发表日期	2018
ISSN	19940416
卷号	12 期号:9
英文摘要	Variations in properties controlling ice flow (e.g., topography, accumulation rate, basal friction) are recorded by structures in glacial stratigraphy. When anomalies that disturb the stratigraphy are fixed in space, the structures they produce advect away from the source and can be used to trace flow pathways and reconstruct ice-flow patterns of the past. Here we provide an example of one of these persistent tracers: A prominent unconformity in the glacial layering that originates at Mt. Resnik, part of a subglacial volcanic complex near Kamb Ice Stream in central West Antarctica. The unconformity records a change in the regional thinning behavior seemingly coincident (∼3440±117a) with stabilization of grounding-line retreat in the Ross Sea Embayment. We argue that this feature records both the flow and thinning history far upstream of the Ross Sea grounding line, indicating a limited influence of observed ice-stream stagnation cycles on large-scale ice-sheet routing over the last ∼ 5700 years. © 2018 Author(s).
学科领域	glacier retreat; grounding line; ice flow; ice sheet; ice stream; persistence; subglacial environment; tracer; Antarctic Ice Sheet; Antarctica; Kamb Ice Stream; Mount Resnik; Ross Sea; Southern Ocean; West Antarctic Ice Sheet; West Antarctica
语种	英语
scopus关键词	glacier retreat; grounding line; ice flow; ice sheet; ice stream; persistence; subglacial environment; tracer; Antarctic Ice Sheet; Antarctica; Kamb Ice Stream; Mount Resnik; Ross Sea; Southern Ocean; West Antarctic Ice Sheet; 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/119076
作者单位	Department of Earth and Space Sciences, University of Washington, Johnson Hall Rm-070, P.O. Box 351310, Seattle, WA 98195, United States; Department of Physics, St. Olaf College, 1520 St. Olaf Avenue, Northfield, MN 55057, United States
推荐引用方式 GB/T 7714	Holschuh N.,Christianson K.,Conway H.,et al. Persistent tracers of historic ice flow in glacial stratigraphy near Kamb Ice Stream, West Antarctica[J],2018,12(9).
APA	Holschuh N.,Christianson K.,Conway H.,Jacobel R.W.,&Welch B.C..(2018).Persistent tracers of historic ice flow in glacial stratigraphy near Kamb Ice Stream, West Antarctica.Cryosphere,12(9).
MLA	Holschuh N.,et al."Persistent tracers of historic ice flow in glacial stratigraphy near Kamb Ice Stream, West Antarctica".Cryosphere 12.9(2018).