气候变化领域集成服务门户(CCPortal): 14C and 10Be dated Late Holocene fluctuations of Patagonian glaciers in Torres del Paine (Chile; 51°S) and connections to Antarctic climate change

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DOI	10.1016/j.quascirev.2020.106541
	14C and 10Be dated Late Holocene fluctuations of Patagonian glaciers in Torres del Paine (Chile; 51°S) and connections to Antarctic climate change
	García J.-L.; Hall B.L.; Kaplan M.R.; Gómez G.A.; De Pol-Holz R.; García V.J.; Schaefer J.M.; Schwartz R.
发表日期	2020
ISSN	0277-3791
卷号	246
英文摘要	Southern Hemisphere Holocene glacier chronologies are important for unraveling past climate change, mid-to-high latitude teleconnections, and regional to global climate forcing. At present, a significant number of glacier chronologies for Patagonia are based on 14C dating, which may afford only maximum- or minimum-limiting dates. Here, we combine geomorphology and stratigraphy with radiocarbon (14C) and beryllium-10 (10Be) surface exposure-age dating at three outlet glaciers, Zapata, Tyndall, and Pingo. These glaciers drain the southernmost tip of the Southern Patagonian Ice Field at Torres del Paine National Park, Chile (51°S). After an expansion that we date at 3200 yr. B.P., the Torres del Paine glaciers expanded to their last major Late Holocene maxima at 600 and 340 yr. B.P., with the final dated readvance after 190 yr. B.P. We use these data, together with other Patagonian glacier records, to define the early, mid and final glacial stages of the last millennium. These cold events were separated by warm conditions that allowed the Nothofagus forest to colonize deglaciated land. The presence of near-concurrent glacier fluctuations in Patagonia and Antarctic Peninsula indicates widespread cooling punctuated the Late Holocene, including the last millennium, across much of the extratropical Southern Hemisphere. We link this cooling to cold oceanographic-atmospheric conditions forced by a northern shift or intensification of the Southern Westerly Winds. Such scenario increased northward advection of cold Antarctic circumpolar water along western Patagonia and favored decreased upwelling of warm circumpolar deep water together with expanded sea ice around the Antarctic Peninsula. © 2020 Elsevier Ltd
英文关键词	Antarctic peninsula; Holocene; Patagonian glaciers; Radiocarbon and 10Be cosmogenic Dating; Southern westerly winds; Torres del paine
语种	英语
scopus关键词	Sea ice; Stratigraphy; Antarctic climate; Antarctic Peninsula; Atmospheric conditions; Glacier fluctuations; Nothofagus forests; Southern Hemisphere; Southern westerly winds; Surface exposure age; Climate change; advection; Antarctic Circumpolar Wave; beryllium isotope; carbon isotope; climate conditions; deep water; Holocene; radiocarbon dating; Southern Hemisphere; upwelling; westerly; Antarctic Peninsula; Antarctica; Chile; Magallanes; Southern Patagonian Ice Field; Torres del Paine National Park; West Antarctica; Nothofagus
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/151320
作者单位	Instituto de Geografía, Pontificia Universidad Católica de Chile, Avenida Vicuña Mackenna 4860, Santiago, Comuna Macul 782-0436, Chile; School of Earth and Climate Sciences and Climate Change Institute, University of Maine, Orono, ME 04469, United States; Geochemistry, Lamont-Doherty Earth Observatory of Columbia University, Palisades, NY 10964, United States; Centro de Investigación GAIA-Antártica (CIGA) and Network for Extreme Environment Reasearch (NEXER), Universidad de Magallanes, Punta Arenas, Chile; Espoz 4100, Dept. 32, Santiago, Vitacura, Chile; Department of Earth and Environmental Sciences, Columbia University, New York, NY 10027, United States
推荐引用方式 GB/T 7714	García J.-L.,Hall B.L.,Kaplan M.R.,et al. 14C and 10Be dated Late Holocene fluctuations of Patagonian glaciers in Torres del Paine (Chile; 51°S) and connections to Antarctic climate change[J],2020,246.
APA	García J.-L..,Hall B.L..,Kaplan M.R..,Gómez G.A..,De Pol-Holz R..,...&Schwartz R..(2020).14C and 10Be dated Late Holocene fluctuations of Patagonian glaciers in Torres del Paine (Chile; 51°S) and connections to Antarctic climate change.Quaternary Science Reviews,246.
MLA	García J.-L.,et al."14C and 10Be dated Late Holocene fluctuations of Patagonian glaciers in Torres del Paine (Chile; 51°S) and connections to Antarctic climate change".Quaternary Science Reviews 246(2020).