气候变化领域集成服务门户(CCPortal): Reconstructing the last interglacial at Summit; Greenland: Insights from GISP2

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DOI	10.1073/pnas.1524766113
	Reconstructing the last interglacial at Summit; Greenland: Insights from GISP2
	Yau A.M.; Bender M.L.; Robinson A.; Brook E.J.
发表日期	2016
ISSN	0027-8424
起始页码	9710
结束页码	9715
卷号	113 期号:35
英文摘要	The Eemian (last interglacial, 130-115 ka) was likely the warmest of all interglacials of the last 800 ka, with summer Arctic temperatures 3-5 °C above present. Here, we present improved Eemian climate records from central Greenland, reconstructed from the base of the Greenland Ice Sheet Project 2 (GISP2) ice core. Our record comes from clean, stratigraphically disturbed, and isotopi-cally warm ice from 2, 750 to 3, 040 m depth. The age of this ice is constrained by measuring CH4 and δ18O of O2, and comparing with the historical record of these properties from the North Greenland Ice Core Project (NGRIP) and North Greenland Eemian Ice Drilling (NEEM) ice cores. The δ18Oice, δ15N of N2, and total air content for samples dating discontinuously from 128 to 115 ka indicate a warming of ∼6 °C between 127-121 ka, and a similar elevation history between GISP2 and NEEM. The reconstructed climate and elevation histories are compared with an ensemble of coupled climate-ice-sheet model simulations of the Greenland ice sheet. Those most consistent with the reconstructed temperatures indicate that the Greenland ice sheet contributed 5.1 m (4.1-6.2 m, 95% credible interval) to global eustatic sea level toward the end of the Eemian. Greenland likely did not contribute to anomalously high sea levels at ∼127 ka, or to a rapid jump in sea level at ∼120 ka. However, several unexplained discrepancies remain between the inferred and simulated histories of temperature and accumulation rate at GISP2 and NEEM, as well as between the climatic reconstructions themselves.
英文关键词	Greenland ice sheet; Ice cores; Last interglacial; Sea level rise
语种	英语
scopus关键词	ice; nitrogen 15; oxygen; oxygen 18; air; Article; climate; climate change; environmental temperature; greenhouse effect; Greenland; interglacial; priority journal; sea level; simulation; warming
来源期刊	Proceedings of the National Academy of Sciences of the United States of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/158901
作者单位	Yau, A.M., Department of Geosciences, Princeton University, Princeton, NJ 08540, United States; Bender, M.L., Department of Geosciences, Princeton University, Princeton, NJ 08540, United States, Institute of Oceanology, Shanghai Jiao Tong University, Minhang District, Shanghai, 200240, China; Robinson, A., Universidad Complutense de Madrid, Madrid, 28040, Spain, Instituto de Geociencias, Universidad Complutense de Madrid, Consejo Superior de Investigaciones Científicas, Madrid, 28040, Spain, Potsdam Institute for Climate Impact Research, Potsdam, 14473, Germany; Brook, E.J., College of Earth, Ocean, and Atmospheric Sciences, Oregon State University, Corvallis, OR 97331, United States
推荐引用方式 GB/T 7714	Yau A.M.,Bender M.L.,Robinson A.,et al. Reconstructing the last interglacial at Summit; Greenland: Insights from GISP2[J],2016,113(35).
APA	Yau A.M.,Bender M.L.,Robinson A.,&Brook E.J..(2016).Reconstructing the last interglacial at Summit; Greenland: Insights from GISP2.Proceedings of the National Academy of Sciences of the United States of America,113(35).
MLA	Yau A.M.,et al."Reconstructing the last interglacial at Summit; Greenland: Insights from GISP2".Proceedings of the National Academy of Sciences of the United States of America 113.35(2016).