气候变化领域集成服务门户(CCPortal): Mid-Holocene Grounding Line Retreat and Readvance at Whillans Ice Stream; West Antarctica

CCPortal

DOI	10.1029/2020GL088476
	Mid-Holocene Grounding Line Retreat and Readvance at Whillans Ice Stream; West Antarctica
	Venturelli R.A.; Siegfried M.R.; Roush K.A.; Li W.; Burnett J.; Zook R.; Fricker H.A.; Priscu J.C.; Leventer A.; Rosenheim B.E.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:15
英文摘要	Understanding ice sheet evolution through the geologic past can help constrain ice sheet models that predict future ice dynamics. Existing geological records of grounding line retreat in the Ross Sea, Antarctica, have been confined to ice-free and terrestrial archives, which reflect dynamics from periods of more extensive ice cover. Therefore, our perspective of grounding line retreat since the Last Glacial Maximum remains incomplete. Sediments beneath Ross Ice Shelf and grounded ice offer complementary insight into the southernmost extent of grounding line retreat, yielding a more complete view of ice dynamics during deglaciation. Here we thermochemically separate the youngest organic carbon to estimate ages from sediments extracted near the Whillans Ice Stream grounding line to provide direct evidence of mid-Holocene (7.5–4.8 kyr B.P.) grounding line retreat in that region. Our study demonstrates the utility of accurately dated, grounding-line-proximal sediment deposits for reconstructing past interactions between marine and subglacial environments. ©2020. The Authors.
英文关键词	Dynamics; Glaciers; Organic carbon; Sediments; Deglaciations; Grounding line; Ice sheet models; Last Glacial Maximum; Ross ice shelves; Sediment deposits; Thermo-chemically; West antarctica; Ice; deglaciation; grounding line; Holocene; ice cover; ice retreat; Last Glacial Maximum; subglacial environment; Antarctic Ice Sheet; Antarctica; Ross Ice Shelf; Ross Sea; Southern Ocean; West Antarctic Ice Sheet; West Antarctica; Whillans Ice Stream
语种	英语
来源期刊	Geophysical Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/170054
作者单位	College of Marine Science, University of South Florida, St. Petersburg, FL, United States; Department of Geophysics, Colorado School of Mines, Golden, CO, United States; Institute of Geophysics and Planetary Physics, Scripps Institution of Oceanography, University of California, San Diego, La Jolla, CA, United States; Department of Land Resources and Environmental Science, Montana State University, Bozeman, MT, United States; Applied Physics Laboratory, University of Washington, Seattle, WA, United States; University of Nebraska–Lincoln, Lincoln, NE, United States; Department of Geology, Colgate University, Hamilton, NY, United States
推荐引用方式 GB/T 7714	Venturelli R.A.,Siegfried M.R.,Roush K.A.,et al. Mid-Holocene Grounding Line Retreat and Readvance at Whillans Ice Stream; West Antarctica[J],2020,47(15).
APA	Venturelli R.A..,Siegfried M.R..,Roush K.A..,Li W..,Burnett J..,...&Rosenheim B.E..(2020).Mid-Holocene Grounding Line Retreat and Readvance at Whillans Ice Stream; West Antarctica.Geophysical Research Letters,47(15).
MLA	Venturelli R.A.,et al."Mid-Holocene Grounding Line Retreat and Readvance at Whillans Ice Stream; West Antarctica".Geophysical Research Letters 47.15(2020).