气候变化领域集成服务门户(CCPortal): Timing and structure of the Younger Dryas event and its underlying climate dynamics

CCPortal

DOI	10.1073/pnas.2007869117
	Timing and structure of the Younger Dryas event and its underlying climate dynamics
	Cheng H.; Zhang H.; Spötl C.; Baker J.; Sinha A.; Li H.; Bartolomé M.; Moreno A.; Kathayat G.; Zhao J.; Dong X.; Li Y.; Ning Y.; Jia X.; Zong B.; Brahim Y.A.; Pérez-Mejiás C.; Cai Y.; Novello V.F.; Cruz F.W.; Severinghaus J.P.; An Z.; Edwards R.L.
发表日期	2020
ISSN	0027-8424
起始页码	23408
结束页码	23417
卷号	117 期号:38
英文摘要	The Younger Dryas (YD), arguably the most widely studied millennialscale extreme climate event, was characterized by diverse hydroclimate shifts globally and severe cooling at high northern latitudes that abruptly punctuated the warming trend from the last glacial to the present interglacial. To date, a precise understanding of its trigger, propagation, and termination remains elusive. Here, we present speleothem oxygen-isotope data that, in concert with other proxy records, allow us to quantify the timing of the YD onset and termination at an unprecedented subcentennial temporal precision across the North Atlantic, Asian Monsoon-Westerlies, and South American Monsoon regions. Our analysis suggests that the onsets of YD in the North Atlantic (12,870 ± 30 B.P.) and the Asian Monsoon- Westerlies region are essentially synchronous within a few decades and lead the onset in Antarctica, implying a north-to-south climate signal propagation via both atmospheric (decadal-time scale) and oceanic (centennial-time scale) processes, similar to the Dansgaard- Oeschger events during the last glacial period. In contrast, the YD termination may have started first in Antarctica at ~11,900 B.P., or perhaps even earlier in the western tropical Pacific, followed by the North Atlantic between ~11,700 ± 40 and 11,610 ± 40 B.P. These observations suggest that the initial YD termination might have originated in the Southern Hemisphere and/or the tropical Pacific, indicating a Southern Hemisphere/tropics to North Atlantic-Asian Monsoon-Westerlies directionality of climatic recovery. © 2020 National Academy of Sciences. All rights reserved.
英文关键词	Climate dynamics; Event phasing; Structure; Timing; Younger Dryas
语种	英语
scopus关键词	oxygen 18; Article; climate; geographic and geological parameters; glacial period; priority journal; quantitative analysis; speleothem; time; Younger Dryas
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/160222
作者单位	Cheng, H., Institute of Global Environmental Change, Xi'An Jiaotong University, Xi'an, 710054, China, State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an, 710061, China, Key Laboratory of Karst Dynamics, Ministry of Land and Resources, Institute of Karst Geology, Chinese Academy of Geological Sciences, Guilin, 541004, China; Zhang, H., Institute of Global Environmental Change, Xi'An Jiaotong University, Xi'an, 710054, China; Spötl, C., Institute of Geology, University of Innsbruck, Innsbruck, 6020, Austria; Baker, J., Institute of Global Environmental Change, Xi'An Jiaotong University, Xi'an, 710054, China; Sinha, A., Department of Earth Sciences, California State University, Dominguez Hills, Carson, CA 90747, United States; Li, H., Institute of Global Environmental Change, Xi'An Jiaotong University, Xi'an, 710054, China; Bartolomé, M., Departamento de Geología, Museo Nacional de Ciencias Naturales, Consejo Superior de Investigaciones C...
推荐引用方式 GB/T 7714	Cheng H.,Zhang H.,Spötl C.,et al. Timing and structure of the Younger Dryas event and its underlying climate dynamics[J],2020,117(38).
APA	Cheng H..,Zhang H..,Spötl C..,Baker J..,Sinha A..,...&Edwards R.L..(2020).Timing and structure of the Younger Dryas event and its underlying climate dynamics.Proceedings of the National Academy of Sciences of the United States of America,117(38).
MLA	Cheng H.,et al."Timing and structure of the Younger Dryas event and its underlying climate dynamics".Proceedings of the National Academy of Sciences of the United States of America 117.38(2020).