气候变化领域集成服务门户(CCPortal): An updated radiocarbon-based ice margin chronology for the last deglaciation of the North American Ice Sheet Complex

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DOI	10.1016/j.quascirev.2020.106223
	An updated radiocarbon-based ice margin chronology for the last deglaciation of the North American Ice Sheet Complex
	Dalton A.S.; Margold M.; Stokes C.R.; Tarasov L.; Dyke A.S.; Adams R.S.; Allard S.; Arends H.E.; Atkinson N.; Attig J.W.; Barnett P.J.; Barnett R.L.; Batterson M.; Bernatchez P.; Borns H.W.; Jr.; Breckenridge A.; Briner J.P.; Brouard E.; Campbell J.E.; Carlson A.E.; Clague J.J.; Curry B.B.; Daigneault R.-A.; Dubé-Loubert H.; Easterbrook D.J.; Franzi D.A.; Friedrich H.G.; Funder S.; Gauthier M.S.; Gowan A.S.; Harris K.L.; Hétu B.; Hooyer T.S.; Jennings C.E.; Johnson M.D.; Kehew A.E.; Kelley S.E.; Kerr D.; King E.L.; Kjeldsen K.K.; Knaeble A.R.; Lajeunesse P.; Lakeman T.R.; Lamothe M.; Larson P.; Lavoie M.; Loope H.M.; Lowell T.V.; Lusardi B.A.; Manz L.; McMartin I.; Nixon F.C.; Occhietti S.; Parkhill M.A.; Piper D.J.W.; Pronk A.G.; Richard P.J.H.; Ridge J.C.; Ross M.; Roy M.; Seaman A.; Shaw J.; Stea R.R.; Teller J.T.; Thompson W.B.; Thorleifson L.H.; Utting D.J.; Veillette J.J.; Ward B.C.; Weddle T.K.; Wright H.E.; Jr.
发表日期	2020
ISSN	0277-3791
卷号	234
英文摘要	The North American Ice Sheet Complex (NAISC; consisting of the Laurentide, Cordilleran and Innuitian ice sheets) was the largest ice mass to repeatedly grow and decay in the Northern Hemisphere during the Quaternary. Understanding its pattern of retreat following the Last Glacial Maximum is critical for studying many facets of the Late Quaternary, including ice sheet behaviour, the evolution of Holocene landscapes, sea level, atmospheric circulation, and the peopling of the Americas. Currently, the most up-to-date and authoritative margin chronology for the entire ice sheet complex is featured in two publications (Geological Survey of Canada Open File 1574 [Dyke et al., 2003]; ‘Quaternary Glaciations – Extent and Chronology, Part II’ [Dyke, 2004]). These often-cited datasets track ice margin recession in 36 time slices spanning 18 ka to 1 ka (all ages in uncalibrated radiocarbon years) using a combination of geomorphology, stratigraphy and radiocarbon dating. However, by virtue of being over 15 years old, the ice margin chronology requires updating to reflect new work and important revisions. This paper updates the aforementioned 36 ice margin maps to reflect new data from regional studies. We also update the original radiocarbon dataset from the 2003/2004 papers with 1541 new ages to reflect work up to and including 2018. A major revision is made to the 18 ka ice margin, where Banks and Eglinton islands (once considered to be glacial refugia) are now shown to be fully glaciated. Our updated 18 ka ice sheet increased in areal extent from 17.81 to 18.37 million km2, which is an increase of 3.1% in spatial coverage of the NAISC at that time. Elsewhere, we also summarize, region-by-region, significant changes to the deglaciation sequence. This paper integrates new information provided by regional experts and radiocarbon data into the deglaciation sequence while maintaining consistency with the original ice margin positions of Dyke et al. (2003) and Dyke (2004) where new information is lacking; this is a pragmatic solution to satisfy the needs of a Quaternary research community that requires up-to-date knowledge of the pattern of ice margin recession of what was once the world's largest ice mass. The 36 updated isochrones are available in PDF and shapefile format, together with a spreadsheet of the expanded radiocarbon dataset (n = 5195 ages) and estimates of uncertainty for each interval. © 2020 Elsevier Ltd
英文关键词	Glaciation; Ice margin chronology; North America; Quaternary; Radiocarbon
语种	英语
scopus关键词	Glacial geology; Glaciers; Sea level; Stratigraphy; Uncertainty analysis; Atmospheric circulation; Geological Survey of Canada; Glaciation; Last Glacial Maximum; North America; Northern Hemispheres; Quaternary; Radiocarbon; Ice; chronology; deglaciation; Holocene; ice margin; ice sheet; last deglaciation; Last Glacial Maximum; Northern Hemisphere; Quaternary; radiocarbon dating; stratigraphy; Canada
来源期刊	Quaternary Science Reviews
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/151533
作者单位	Department of Geography, Durham University, Durham, United Kingdom; Department of Physical Geography and Geoecology, Charles University, Prague, Czech Republic; Department of Physics and Physical Oceanography, Memorial University, St. John's, Newfoundland, Canada; Department of Earth Sciences, Dalhousie University, Halifax, Nova Scotia, Canada; Department of Anthropology, McGill University, Montreal, Quebec, Canada; Madrone Environmental Services Ltd, Abbotsford, British Columbia, Canada; New Brunswick Geological Survey, New Brunswick Department of Energy and Resource Development, Fredericton, New Brunswick, Canada; Division of Lands and Mineral, Minnesota Department of Natural Resources, St. Paul, MN, United States; Alberta Geological Survey, Edmonton, Alberta, Canada; Wisconsin Geological and Natural History Survey, Madison, WI, United States; Harquail School of Earth Sciences, Laurentian University, Sudbury, Ontario, Canada; Département de biologie, chimie et géographie & Centre for Northern Studies (C...
推荐引用方式 GB/T 7714	Dalton A.S.,Margold M.,Stokes C.R.,et al. An updated radiocarbon-based ice margin chronology for the last deglaciation of the North American Ice Sheet Complex[J],2020,234.
APA	Dalton A.S..,Margold M..,Stokes C.R..,Tarasov L..,Dyke A.S..,...&Jr..(2020).An updated radiocarbon-based ice margin chronology for the last deglaciation of the North American Ice Sheet Complex.Quaternary Science Reviews,234.
MLA	Dalton A.S.,et al."An updated radiocarbon-based ice margin chronology for the last deglaciation of the North American Ice Sheet Complex".Quaternary Science Reviews 234(2020).