globalchange  > 过去全球变化的重建
DOI: 10.1016/j.quascirev.2019.05.007
WOS记录号: WOS:000474318200018
论文题名:
Multiple independent records of local glacier variability on Nuussuaq, West Greenland, during the Holocene
作者: Schweinsberg, Avriel D.1; Briner, Jason P.1; Licciardi, Joseph M.2; Bennike, Ole3; Lifton, Nathaniel A.4,5; Graham, Brandon L.1; Young, Nicolas E.6; Schaefer, Joerg M.6; Zimmerman, Susan H.7
通讯作者: Schweinsberg, Avriel D.
刊名: QUATERNARY SCIENCE REVIEWS
ISSN: 0277-3791
出版年: 2019
卷: 215, 页码:253-271
语种: 英语
英文关键词: Holocene ; Greenland Mountain glaciers ; Lake sediment ; Cosmogenic in situ C-14 ; Cosmogenic Be-10 ; Neoglaciation
WOS关键词: DISKO BUGT REGION ; LATEST PLEISTOCENE ; ICE-SHEET ; BAFFIN-ISLAND ; LAKE-SEDIMENTS ; CLIMATE-CHANGE ; EAST GREENLAND ; ARCTIC CANADA ; EXPOSURE AGES ; BE-10
WOS学科分类: Geography, Physical ; Geosciences, Multidisciplinary
WOS研究方向: Physical Geography ; Geology
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 1-1470 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. (C) 2019 Elsevier Ltd. All rights reserved.


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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/141034
Appears in Collections:过去全球变化的重建

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作者单位: 1.SUNY Buffalo, Dept Geol, Buffalo, NY 14260 USA
2.Univ New Hampshire, Dept Earth Sci, Durham, NH 03824 USA
3.Geol Survey Denmark & Greenland, Oster Voldgade 10, DK-1350 Copenhagen K, Denmark
4.Purdue Univ, Dept Earth Atmospher & Planetary Sci, W Lafayette, IN 47907 USA
5.Purdue Univ, Dept Phys & Astron, W Lafayette, IN 47907 USA
6.Columbia Univ, Lamont Doherty Earth Observ, Palisades, NY USA
7.Lawrence Livermore Natl Lab, Ctr Accelerator Mass Spectrometry, Livermore, CA USA

Recommended Citation:
Schweinsberg, Avriel D.,Briner, Jason P.,Licciardi, Joseph M.,et al. Multiple independent records of local glacier variability on Nuussuaq, West Greenland, during the Holocene[J]. QUATERNARY SCIENCE REVIEWS,2019-01-01,215:253-271
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