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...
Published in: | Proceedings of the National Academy of Sciences |
---|---|
Main Authors: | , , , , , , , , , , , , , , , , , , , , , , |
Format: | Text |
Language: | English |
Published: |
National Academy of Sciences
2020
|
Subjects: | |
Online Access: | http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7519346/ http://www.ncbi.nlm.nih.gov/pubmed/32900942 https://doi.org/10.1073/pnas.2007869117 |
id |
ftpubmed:oai:pubmedcentral.nih.gov:7519346 |
---|---|
record_format |
openpolar |
spelling |
ftpubmed:oai:pubmedcentral.nih.gov:7519346 2023-05-15T14:02:07+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 Ait Brahim, Yassine Pérez-Mejías, Carlos Cai, Yanjun Novello, Valdir F. Cruz, Francisco W. Severinghaus, Jeffrey P. An, Zhisheng Edwards, R. Lawrence 2020-09-22 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7519346/ http://www.ncbi.nlm.nih.gov/pubmed/32900942 https://doi.org/10.1073/pnas.2007869117 en eng National Academy of Sciences http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7519346/ http://www.ncbi.nlm.nih.gov/pubmed/32900942 http://dx.doi.org/10.1073/pnas.2007869117 Copyright © 2020 the Author(s). Published by PNAS. http://creativecommons.org/licenses/by/4.0/ https://creativecommons.org/licenses/by/4.0/This open access article is distributed under Creative Commons Attribution License 4.0 (CC BY) (http://creativecommons.org/licenses/by/4.0/) . CC-BY Proc Natl Acad Sci U S A Physical Sciences Text 2020 ftpubmed https://doi.org/10.1073/pnas.2007869117 2020-10-11T00:21:12Z 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. Text Antarc* Antarctica Dansgaard-Oeschger events North Atlantic PubMed Central (PMC) Pacific Proceedings of the National Academy of Sciences 117 38 23408 23417 |
institution |
Open Polar |
collection |
PubMed Central (PMC) |
op_collection_id |
ftpubmed |
language |
English |
topic |
Physical Sciences |
spellingShingle |
Physical Sciences 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 Ait Brahim, Yassine 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 |
Physical Sciences |
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 |
Text |
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 Ait Brahim, Yassine 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 Ait Brahim, Yassine 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 |
National Academy of Sciences |
publishDate |
2020 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7519346/ http://www.ncbi.nlm.nih.gov/pubmed/32900942 https://doi.org/10.1073/pnas.2007869117 |
geographic |
Pacific |
geographic_facet |
Pacific |
genre |
Antarc* Antarctica Dansgaard-Oeschger events North Atlantic |
genre_facet |
Antarc* Antarctica Dansgaard-Oeschger events North Atlantic |
op_source |
Proc Natl Acad Sci U S A |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7519346/ http://www.ncbi.nlm.nih.gov/pubmed/32900942 http://dx.doi.org/10.1073/pnas.2007869117 |
op_rights |
Copyright © 2020 the Author(s). Published by PNAS. http://creativecommons.org/licenses/by/4.0/ https://creativecommons.org/licenses/by/4.0/This open access article is distributed under Creative Commons Attribution License 4.0 (CC BY) (http://creativecommons.org/licenses/by/4.0/) . |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1073/pnas.2007869117 |
container_title |
Proceedings of the National Academy of Sciences |
container_volume |
117 |
container_issue |
38 |
container_start_page |
23408 |
op_container_end_page |
23417 |
_version_ |
1766272209294196736 |