气候变化领域集成服务门户(CCPortal): The cause of carbon isotope minimum events on glacial terminations

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DOI	10.1126/science.1069401
	The cause of carbon isotope minimum events on glacial terminations
	Spero H.J.; Lea D.W.
发表日期	2002
ISSN	0036-8075
起始页码	522
结束页码	525
卷号	296 期号:5567
英文摘要	The occurrence of carbon isotope minima at the beginning of glacial terminations is a common feature of planktic foraminifera carbon isotopic records from the Indo-Pacific, sub-Antarctic, and South Atlantic. We use the δ13C record of a thermocline-dwelling foraminifera, Neogloboquadrina dutertrei, and surface temperature estimates from the eastern equatorial Pacific to demonstrate that the onset of δ13C minimum events and the initiation of Southern Ocean warming occurred simultaneously. Timing agreement between the marine record and the δ13C minimum in an Antarctic atmospheric record suggests that the deglacial events were a response to the breakdown of surface water stratification, renewed Circumpolar Deep Water upwelling, and advection of low δ13C waters to the convergence zone at the sub-Antarctic front. On the basis of age agreement between the absolute δ13C minimum in surface records and the shift from low to high δ13C in the deep South Atlantic, we suggest that the δ13C rise that marks the end of the carbon isotope minima was due to the resumption of North Atlantic Deep Water influence in the Southern Ocean.
英文关键词	Glacial geology; Isotopes; Natural water geochemistry; Temperature distribution; Glacial terminations; Carbon; carbon; carbon isotope; deglaciation; planktonic foraminifera; upwelling; article; atmosphere; foraminifer; ocean environment; priority journal; thermocline; water temperature; Animals; Atmosphere; Carbon Dioxide; Carbon Isotopes; Climate; Geologic Sediments; Oxygen Isotopes; Pacific Ocean; Plankton; Seawater; Temperature; Time; Atlantic Ocean; Pacific Ocean; Southern Ocean; Foraminifera; Neogloboquadrina dutertrei
语种	英语
来源期刊	Science
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/245578
作者单位	Department of Geology, University of California, Davis, CA 95616, United States
推荐引用方式 GB/T 7714	Spero H.J.,Lea D.W.. The cause of carbon isotope minimum events on glacial terminations[J],2002,296(5567).
APA	Spero H.J.,&Lea D.W..(2002).The cause of carbon isotope minimum events on glacial terminations.Science,296(5567).
MLA	Spero H.J.,et al."The cause of carbon isotope minimum events on glacial terminations".Science 296.5567(2002).