气候变化领域集成服务门户(CCPortal): Lipid Biomarkers Quantify Holocene Summer Temperature and Ice Cap Sensitivity in Icelandic Lakes

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DOI	10.1029/2019GL085728
	Lipid Biomarkers Quantify Holocene Summer Temperature and Ice Cap Sensitivity in Icelandic Lakes
	Harning D.J.; Curtin L.; Geirsdóttir Á.; D'Andrea W.J.; Miller G.H.; Sepúlveda J.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:3
英文摘要	Although recent research has made significant advances in characterizing Iceland's Holocene environmental history, the region still lacks reliable and continuous records of corresponding paleotemperature. Here we merge bacterial and algal lipid biomarkers (branched glycerol dialkyl glycerol tetraethers and long-chain alkenones, respectively) to quantify Holocene temperature change from a small lake in northwest Iceland. Our local proxy record shows that early Holocene and late Holocene temperatures ranged from 3.2 to −1.1 oC relative today, which are in close agreement with independent estimates from regional ice cap models. At 2.4 ka, we observe abrupt cooling across bacteria-, algae-, and glacier-derived proxy records, which may have been initiated by extratropical volcanism and/or ocean/atmospheric climate variability of the North Atlantic region. Using early Holocene warmth and ice cap demise as an analog for modern climate change, Intergovernmental Panel on Climate Change temperature projections suggest that the local ice cap, Drangajökull, could vanish by ~2050 CE. © 2020. American Geophysical Union. All Rights Reserved.
英文关键词	Biomarkers; Climate change; Glaciers; Glycerol; Lakes; Snow; Holocenes; Icelands; Lake sediments; Lipid biomarkers; Paleoclimates; Ice; algae; Bacteria (microorganisms)
语种	英语
来源期刊	Geophysical Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/170735
作者单位	Faculty of Earth Sciences, University of Iceland, Reykjavik, Iceland; Institute of Arctic and Alpine Research and Department of Geological Sciences, University of Colorado Boulder, Boulder, CO, United States; Organic Geochemistry Laboratory, University of Colorado Boulder, Boulder, CO, United States; Lamont-Doherty Earth Observatory, Columbia University, New York, New York City, United States
推荐引用方式 GB/T 7714	Harning D.J.,Curtin L.,Geirsdóttir Á.,et al. Lipid Biomarkers Quantify Holocene Summer Temperature and Ice Cap Sensitivity in Icelandic Lakes[J],2020,47(3).
APA	Harning D.J.,Curtin L.,Geirsdóttir Á.,D'Andrea W.J.,Miller G.H.,&Sepúlveda J..(2020).Lipid Biomarkers Quantify Holocene Summer Temperature and Ice Cap Sensitivity in Icelandic Lakes.Geophysical Research Letters,47(3).
MLA	Harning D.J.,et al."Lipid Biomarkers Quantify Holocene Summer Temperature and Ice Cap Sensitivity in Icelandic Lakes".Geophysical Research Letters 47.3(2020).