气候变化领域集成服务门户(CCPortal): Synchronous centennial abrupt events in the ocean and atmosphere during the last deglaciation

CCPortal

DOI	10.1126/science.aac6159
	Synchronous centennial abrupt events in the ocean and atmosphere during the last deglaciation
	Chen T.; Robinson L.F.; Burke A.; Southon J.; Spooner P.; Morris P.J.; Ng H.C.
发表日期	2015
ISSN	0036-8075
起始页码	1537
结束页码	1541
卷号	349 期号:6255
英文摘要	Antarctic ice-core data reveal that the atmosphere experienced abrupt centennial increases in CO2 concentration during the last deglaciation (∼18 thousand to 11 thousand years ago). Establishing the role of ocean circulation in these changes requires highresolution, accurately dated marine records. Here, we report radiocarbon data from uranium-thorium-dated deep-sea corals in the Equatorial Atlantic and Drake Passage over the past 25,000 years. Two major deglacial radiocarbon shifts occurred in phase with centennial atmospheric CO2 rises at 14.8 thousand and 11.7 thousand years ago. We interpret these radiocarbon-enriched signals to represent two short-lived (less than 500 years) "overshoot" events, with Atlantic meridional overturning stronger than that of the modern era. These results provide compelling evidence for a close coupling of ocean circulation and centennial climate events during the last deglaciation.
英文关键词	carbon 14; carbon dioxide; thorium; uranium; water; thorium; uranium; atmosphere-ocean coupling; carbon dioxide; concentration (composition); coral; deep sea; ice core; last glaciation; marine record; meridional circulation; overturn; radiocarbon dating; uranium series dating; Article; atmosphere; climate; coral; deep sea; deglaciation; priority journal; animal; Anthozoa; chemistry; greenhouse effect; ice cover; radiometric dating; sea; Antarctica; Atlantic Ocean; Atlantic Ocean (Equatorial); Drake Passage; Anthozoa; Animals; Anthozoa; Atmosphere; Climate; Global Warming; Ice Cover; Oceans and Seas; Radiometric Dating; Thorium; Uranium
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/243300
作者单位	Bristol Isotope Group, School of Earth Sciences, University of Bristol, Bristol, United Kingdom; Department of Earth and Environmental Sciences, University of St.Andrews, St. Andrews, United Kingdom; School of Physical Sciences, University of California Irvine, Irvine, CA, United States; Department of Nuclear Sciences and Applications, International Atomic Energy Agency, Monaco
推荐引用方式 GB/T 7714	Chen T.,Robinson L.F.,Burke A.,et al. Synchronous centennial abrupt events in the ocean and atmosphere during the last deglaciation[J],2015,349(6255).
APA	Chen T..,Robinson L.F..,Burke A..,Southon J..,Spooner P..,...&Ng H.C..(2015).Synchronous centennial abrupt events in the ocean and atmosphere during the last deglaciation.Science,349(6255).
MLA	Chen T.,et al."Synchronous centennial abrupt events in the ocean and atmosphere during the last deglaciation".Science 349.6255(2015).