气候变化领域集成服务门户(CCPortal): Multiple independent records of local glacier variability on Nuussuaq; West Greenland; during the Holocene

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DOI	10.1016/j.quascirev.2019.05.007
	Multiple independent records of local glacier variability on Nuussuaq; West Greenland; during the Holocene
	Schweinsberg A.D.; Briner J.P.; Licciardi J.M.; Bennike O.; Lifton N.A.; Graham B.L.; Young N.E.; Schaefer J.M.; Zimmerman S.H.
发表日期	2019
ISSN	0277-3791
起始页码	253
结束页码	271
卷号	215
英文摘要	The sensitivity of mountain glaciers to small-scale climate fluctuations makes records of their past extent among the best proxies for identifying spatio-temporal climate variability. Here we build on the few existing Holocene records of local glacier change in Greenland by using three independent geochronological methods—proglacial lake sediment analysis, cosmogenic 10Be surface-exposure dating, and in situ 14C burial modeling—to reconstruct continuous records of Holocene glacier variability on Nuussuaq, West Greenland. 10Be ages of perched boulders indicate eastern Nuussuaq was deglaciated between ∼11.0 and 10.5 ka. Radiocarbon-dated sediments from two lakes on Nuussuaq contain mineral-rich layers between ∼9.6 and 9.0 and ∼8.7–8.0 cal ka BP that may be correlative with nearby ice sheet moraines deposited in the early Holocene. Multiple proxies for glacier size indicate frequent, high-amplitude glacier fluctuations superimposed on net glacier growth during the late Holocene, with significant ice expansion phases at ∼3.7 ka, 2.8 ka, and throughout the past ∼2 ka. Mean 10Be ages from five nested moraine crests confirm that local glacier extents on Nuussuaq culminated during both the Little Ice Age [∼1470 C.E. (n = 3)and 1750 C.E. (n = 3)]and the preceding centuries (∼520–1320 C.E.; n = 11). Results reveal that local glaciers on Nuussuaq episodically advanced and retreated at centennial timescales throughout the Holocene, most likely in response to regional climate changes in West Greenland superimposed on the progressive insolation-driven cooling trend in the Northern Hemisphere. Our new 10Be moraine chronologies coupled with other glacier-size proxies corroborate an emerging pattern of significant summer cooling and glacier expansion in the centuries prior to the Little Ice Age in the Arctic. © 2019 Elsevier Ltd
英文关键词	Cosmogenic 10Be; Cosmogenic in situ 14C; Greenland; Holocene; Lake sediment; Mountain glaciers; Neoglaciation
语种	英语
scopus关键词	Climate change; Geochronology; Glacial geology; Lakes; Sediments; Cosmogenic; Greenland; Holocenes; Lake sediments; Mountain glaciers; Neoglaciation; Ice; beryllium isotope; carbon isotope; climate variation; cooling; cosmogenic radionuclide; deglaciation; glacier dynamics; Holocene; insolation; lacustrine deposit; Little Ice Age; moraine; mountain region; Neoglacial; Northern Hemisphere; Arctic; Greenland; Nuussuaq; West Greenland
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/151902
作者单位	Department of Geology, University at Buffalo, Buffalo, NY 14260, United States; Department of Earth Sciences, University of New Hampshire, Durham, NH 03824, United States; Geological Survey of Denmark and Greenland, Øster Voldgade 10, Copenhagen K, DK-1350, Denmark; Department of Earth, Atmospheric, and Planetary Sciences, Purdue University, West Lafayette, IN 47907, United States; Department of Physics and Astronomy, Purdue University, West Lafayette, IN 47907, United States; Lamont-Doherty Earth Observatory,Columbia University, Palisades, NY, United States; Center for Accelerator Mass Spectrometry, Lawrence Livermore National Laboratory, Livermore, United States
推荐引用方式 GB/T 7714	Schweinsberg A.D.,Briner J.P.,Licciardi J.M.,et al. Multiple independent records of local glacier variability on Nuussuaq; West Greenland; during the Holocene[J],2019,215.
APA	Schweinsberg A.D..,Briner J.P..,Licciardi J.M..,Bennike O..,Lifton N.A..,...&Zimmerman S.H..(2019).Multiple independent records of local glacier variability on Nuussuaq; West Greenland; during the Holocene.Quaternary Science Reviews,215.
MLA	Schweinsberg A.D.,et al."Multiple independent records of local glacier variability on Nuussuaq; West Greenland; during the Holocene".Quaternary Science Reviews 215(2019).