Timing and structure of the Younger Dryas event and its underlying climate dynamics
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 da...
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ftcdlib:oai:escholarship.org:ark:/13030/qt9ww7r6q2 2023-09-05T13:15:19+02:00 Timing and structure of the Younger Dryas event and its underlying climate dynamics Cheng, Hai Zhang, Haiwei Spötl, Christoph Baker, Jonathan Sinha, Ashish Li, Hanying Bartolomé, Miguel Moreno, Ana Kathayat, Gayatri Zhao, Jingyao Dong, Xiyu Li, Youwei Ning, Youfeng Jia, Xue Zong, Baoyun Brahim, Yassine Ait Pérez-Mejías, Carlos Cai, Yanjun Novello, Valdir F Cruz, Francisco W Severinghaus, Jeffrey P An, Zhisheng Edwards, R Lawrence 23408 - 23417 2020-09-22 application/pdf https://escholarship.org/uc/item/9ww7r6q2 unknown eScholarship, University of California qt9ww7r6q2 https://escholarship.org/uc/item/9ww7r6q2 public Proceedings of the National Academy of Sciences of the United States of America, vol 117, iss 38 Climate Action Younger Dryas timing structure event phasing climate dynamics article 2020 ftcdlib 2023-08-21T18:06:32Z 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 ∼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. Article in Journal/Newspaper Antarc* Antarctica Dansgaard-Oeschger events North Atlantic University of California: eScholarship Pacific |
institution |
Open Polar |
collection |
University of California: eScholarship |
op_collection_id |
ftcdlib |
language |
unknown |
topic |
Climate Action Younger Dryas timing structure event phasing climate dynamics |
spellingShingle |
Climate Action Younger Dryas timing structure event phasing climate dynamics Cheng, Hai Zhang, Haiwei Spötl, Christoph Baker, Jonathan Sinha, Ashish Li, Hanying Bartolomé, Miguel Moreno, Ana Kathayat, Gayatri Zhao, Jingyao Dong, Xiyu Li, Youwei Ning, Youfeng Jia, Xue Zong, Baoyun Brahim, Yassine Ait Pérez-Mejías, Carlos Cai, Yanjun Novello, Valdir F Cruz, Francisco W Severinghaus, Jeffrey P An, Zhisheng Edwards, R Lawrence Timing and structure of the Younger Dryas event and its underlying climate dynamics |
topic_facet |
Climate Action Younger Dryas timing structure event phasing climate dynamics |
description |
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 ∼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. |
format |
Article in Journal/Newspaper |
author |
Cheng, Hai Zhang, Haiwei Spötl, Christoph Baker, Jonathan Sinha, Ashish Li, Hanying Bartolomé, Miguel Moreno, Ana Kathayat, Gayatri Zhao, Jingyao Dong, Xiyu Li, Youwei Ning, Youfeng Jia, Xue Zong, Baoyun Brahim, Yassine Ait Pérez-Mejías, Carlos Cai, Yanjun Novello, Valdir F Cruz, Francisco W Severinghaus, Jeffrey P An, Zhisheng Edwards, R Lawrence |
author_facet |
Cheng, Hai Zhang, Haiwei Spötl, Christoph Baker, Jonathan Sinha, Ashish Li, Hanying Bartolomé, Miguel Moreno, Ana Kathayat, Gayatri Zhao, Jingyao Dong, Xiyu Li, Youwei Ning, Youfeng Jia, Xue Zong, Baoyun Brahim, Yassine Ait Pérez-Mejías, Carlos Cai, Yanjun Novello, Valdir F Cruz, Francisco W Severinghaus, Jeffrey P An, Zhisheng Edwards, R Lawrence |
author_sort |
Cheng, Hai |
title |
Timing and structure of the Younger Dryas event and its underlying climate dynamics |
title_short |
Timing and structure of the Younger Dryas event and its underlying climate dynamics |
title_full |
Timing and structure of the Younger Dryas event and its underlying climate dynamics |
title_fullStr |
Timing and structure of the Younger Dryas event and its underlying climate dynamics |
title_full_unstemmed |
Timing and structure of the Younger Dryas event and its underlying climate dynamics |
title_sort |
timing and structure of the younger dryas event and its underlying climate dynamics |
publisher |
eScholarship, University of California |
publishDate |
2020 |
url |
https://escholarship.org/uc/item/9ww7r6q2 |
op_coverage |
23408 - 23417 |
geographic |
Pacific |
geographic_facet |
Pacific |
genre |
Antarc* Antarctica Dansgaard-Oeschger events North Atlantic |
genre_facet |
Antarc* Antarctica Dansgaard-Oeschger events North Atlantic |
op_source |
Proceedings of the National Academy of Sciences of the United States of America, vol 117, iss 38 |
op_relation |
qt9ww7r6q2 https://escholarship.org/uc/item/9ww7r6q2 |
op_rights |
public |
_version_ |
1776197113739214848 |