气候变化领域集成服务门户(CCPortal): Reduced El Niño-Southern Oscillation during the last glacial maximum

CCPortal

DOI	10.1126/science.1258437
	Reduced El Niño-Southern Oscillation during the last glacial maximum
	Ford H.L.; Ravelo A.C.; Polissar P.J.
发表日期	2015
ISSN	0036-8075
起始页码	255
结束页码	258
卷号	347 期号:6219
英文摘要	El Niño-Southern Oscillation (ENSO) is a major source of global interannual variability, but its response to climate change is uncertain. Paleoclimate records from the Last Glacial Maximum (LGM) provide insight into ENSO behavior when global boundary conditions (ice sheet extent, atmospheric partial pressure of CO2) were different from those today. In this work, we reconstruct LGM temperature variability at equatorial Pacific sites using measurements of individual planktonic foraminifera shells. A deep equatorial thermocline altered the dynamics in the eastern equatorial cold tongue, resulting in reduced ENSO variability during the LGM compared to the Late Holocene. These results suggest that ENSO was not tied directly to the east-west temperature gradient, as previously suggested. Rather, the thermocline of the eastern equatorial Pacific played a decisive role in the ENSO response to LGM climate. © 2015, American Association for the Advancement of Science. All rights reserved.
英文关键词	annual variation; boundary condition; climate change; El Nino-Southern Oscillation; Last Glacial Maximum; paleoclimate; thermocline; Article; atmospheric pressure; climate change; El Nino; foraminifer; last glacial maximum; Late Holocene; nonhuman; planktonic foraminifera; priority journal; radiative forcing; seasonal variation; sediment; surface property; temperature measurement; thermocline; Pacific Ocean; Pacific Ocean (Equatorial); Foraminifera
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/243716
作者单位	Ocean Sciences Department, University of California, Santa Cruz, CA 95064, United States; Biology and Paleo Environment, Lamont-Doherty Earth Observatory, Palisades, NY 10964, United States
推荐引用方式 GB/T 7714	Ford H.L.,Ravelo A.C.,Polissar P.J.. Reduced El Niño-Southern Oscillation during the last glacial maximum[J],2015,347(6219).
APA	Ford H.L.,Ravelo A.C.,&Polissar P.J..(2015).Reduced El Niño-Southern Oscillation during the last glacial maximum.Science,347(6219).
MLA	Ford H.L.,et al."Reduced El Niño-Southern Oscillation during the last glacial maximum".Science 347.6219(2015).