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| Timing and structure of the Younger Dryas event and its underlying climate dynamics | |
| Cheng, Hai1,2,3; Zhang, Haiwei1; Spoetl, Christoph4; Baker, Jonathan1; Sinha, Ashish5; Li, Hanying1; Bartolome, Miguel6; Moreno, Ana7; Kathayat, Gayatri1; Zhao, Jingyao1; Dong, Xiyu1; Li, Youwei1; Ning, Youfeng1; Jia, Xue1; Zong, Baoyun1; Brahim, Yassine Ait1; Perez-Mejias, Carlos1; Cai, Yanjun1; Novello, Valdir F.8; Cruz, Francisco W.8; Severinghaus, Jeffrey P.9; An, Zhisheng2; Edwards, R. Lawrence10,11 | |
| Corresponding Author | Cheng, Hai(cheng021@xjtu.edu.cn) |
| 2020-09-22 | |
| Source Publication | PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
 |
| ISSN | 0027-8424 |
| Volume | 117Issue:38Pages:23408-23417 |
| Abstract | The Younger Dryas (YD), arguably the most widely studied millennial-scale 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 similar to 11,900 B.P., or perhaps even earlier in the western tropical Pacific, followed by the North Atlantic between similar to 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. |
| Keyword | Younger Dryas timing structure event phasing climate dynamics |
| DOI | 10.1073/pnas.2007869117 |
| WOS Keyword | CORE WD2014 CHRONOLOGY ; LAST GLACIAL PERIOD ; HIGH-RESOLUTION ; MONSOON RECORD ; ASIAN MONSOON ; SPELEOTHEM RECORD ; TROPICAL PACIFIC ; HULU CAVE ; OCEAN ; AGE |
| Indexed By | SCI ; SCI |
| Language | 英语 |
| Funding Project | National Nature Science Foundation of China (NSFC)[41888101] ; National Nature Science Foundation of China (NSFC)[41731174] ; US NSF[1702816] |
| WOS Research Area | Science & Technology - Other Topics |
| Funding Organization | National Nature Science Foundation of China (NSFC) ; US NSF |
| WOS Subject | Multidisciplinary Sciences |
| WOS ID | WOS:000575888700007 |
| Publisher | NATL ACAD SCIENCES |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.ieecas.cn/handle/361006/15398 |
| Collection | 黄土与第四纪地质国家重点实验室（2010~） |
| Corresponding Author | Cheng, Hai |
| Affiliation | 1.Xi An Jiao Tong Univ, Inst Global Environm Change, Xian 710054, Peoples R China 2.Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quaternary Geol, Xian 710061, Peoples R China 3.Chinese Acad Geol Sci, Inst Karst Geol, Key Lab Karst Dynam, Minist Land & Resources, Guilin 541004, Peoples R China 4.Univ Innsbruck, Inst Geol, A-6020 Innsbruck, Austria 5.Calif State Univ Dominguez Hills, Dept Earth Sci, Carson, CA 90747 USA 6.CSIC, Museo Nacl Ciencias Nat, Dept Geol, Madrid 28034, Spain 7.CSIC, Inst Pirena Ecol, Zaragoza 50059, Spain 8.Univ Sao Paulo, Inst Geociencias, BR-05508090 Sao Paulo, Brazil 9.Univ Calif San Diego, Scripps Inst Oceanog, La Jolla, CA 92093 USA 10.Univ Minnesota, Dept Earth & Environm Sci, Minneapolis, MN 55455 USA 11.Nanjing Normal Univ, Sch Geog, Nanjing 210023, Peoples R China |
| Recommended Citation GB/T 7714 | Cheng, Hai,Zhang, Haiwei,Spoetl, Christoph,et al. Timing and structure of the Younger Dryas event and its underlying climate dynamics[J]. PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,2020,117(38):23408-23417. |
| APA | Cheng, Hai.,Zhang, Haiwei.,Spoetl, Christoph.,Baker, Jonathan.,Sinha, Ashish.,...&Edwards, R. Lawrence.(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),23408-23417. |
| MLA | Cheng, Hai,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):23408-23417. |
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