The timing, duration and magnitude of the 8.2 ka event in global speleothem records
Abstract Abrupt events are a feature of many palaeoclimate records during the Holocene. The best example is the 8.2 ka event, which was triggered by a release of meltwater into the Labrador Sea and resulted in a weakening of poleward heat transport in the North Atlantic. We use an objective method t...
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ftdoajarticles:oai:doaj.org/article:2e0b9389d9b9458baa33d56b6bc54aee 2023-05-15T16:29:20+02:00 The timing, duration and magnitude of the 8.2 ka event in global speleothem records Sarah E. Parker Sandy P. Harrison 2022-06-01T00:00:00Z https://doi.org/10.1038/s41598-022-14684-y https://doaj.org/article/2e0b9389d9b9458baa33d56b6bc54aee EN eng Nature Portfolio https://doi.org/10.1038/s41598-022-14684-y https://doaj.org/toc/2045-2322 doi:10.1038/s41598-022-14684-y 2045-2322 https://doaj.org/article/2e0b9389d9b9458baa33d56b6bc54aee Scientific Reports, Vol 12, Iss 1, Pp 1-9 (2022) Medicine R Science Q article 2022 ftdoajarticles https://doi.org/10.1038/s41598-022-14684-y 2022-12-30T21:30:13Z Abstract Abrupt events are a feature of many palaeoclimate records during the Holocene. The best example is the 8.2 ka event, which was triggered by a release of meltwater into the Labrador Sea and resulted in a weakening of poleward heat transport in the North Atlantic. We use an objective method to identify rapid climate events in globally distributed speleothem oxygen isotope records during the Holocene. We show that the 8.2 ka event can be identified in >70% of the speleothem records and is the most coherent signal of abrupt climate change during the last 12,000 years. The isotopic changes during the event are regionally homogenous: positive oxygen isotope anomalies are observed across Asia and negative anomalies are seen across Europe, the Mediterranean, South America and southern Africa. The magnitude of the isotopic excursions in Europe and Asia are statistically indistinguishable. There is no significant difference in the duration and timing of the 8.2 ka event between regions, or between the speleothem records and Greenland ice core records. Our study supports a rapid and global climate response to the 8.2 ka freshwater pulse into the North Atlantic, likely transmitted globally via atmospheric teleconnections. Article in Journal/Newspaper Greenland Greenland ice core ice core Labrador Sea North Atlantic Directory of Open Access Journals: DOAJ Articles Greenland Scientific Reports 12 1 |
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Directory of Open Access Journals: DOAJ Articles |
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ftdoajarticles |
language |
English |
topic |
Medicine R Science Q |
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Medicine R Science Q Sarah E. Parker Sandy P. Harrison The timing, duration and magnitude of the 8.2 ka event in global speleothem records |
topic_facet |
Medicine R Science Q |
description |
Abstract Abrupt events are a feature of many palaeoclimate records during the Holocene. The best example is the 8.2 ka event, which was triggered by a release of meltwater into the Labrador Sea and resulted in a weakening of poleward heat transport in the North Atlantic. We use an objective method to identify rapid climate events in globally distributed speleothem oxygen isotope records during the Holocene. We show that the 8.2 ka event can be identified in >70% of the speleothem records and is the most coherent signal of abrupt climate change during the last 12,000 years. The isotopic changes during the event are regionally homogenous: positive oxygen isotope anomalies are observed across Asia and negative anomalies are seen across Europe, the Mediterranean, South America and southern Africa. The magnitude of the isotopic excursions in Europe and Asia are statistically indistinguishable. There is no significant difference in the duration and timing of the 8.2 ka event between regions, or between the speleothem records and Greenland ice core records. Our study supports a rapid and global climate response to the 8.2 ka freshwater pulse into the North Atlantic, likely transmitted globally via atmospheric teleconnections. |
format |
Article in Journal/Newspaper |
author |
Sarah E. Parker Sandy P. Harrison |
author_facet |
Sarah E. Parker Sandy P. Harrison |
author_sort |
Sarah E. Parker |
title |
The timing, duration and magnitude of the 8.2 ka event in global speleothem records |
title_short |
The timing, duration and magnitude of the 8.2 ka event in global speleothem records |
title_full |
The timing, duration and magnitude of the 8.2 ka event in global speleothem records |
title_fullStr |
The timing, duration and magnitude of the 8.2 ka event in global speleothem records |
title_full_unstemmed |
The timing, duration and magnitude of the 8.2 ka event in global speleothem records |
title_sort |
timing, duration and magnitude of the 8.2 ka event in global speleothem records |
publisher |
Nature Portfolio |
publishDate |
2022 |
url |
https://doi.org/10.1038/s41598-022-14684-y https://doaj.org/article/2e0b9389d9b9458baa33d56b6bc54aee |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland Greenland ice core ice core Labrador Sea North Atlantic |
genre_facet |
Greenland Greenland ice core ice core Labrador Sea North Atlantic |
op_source |
Scientific Reports, Vol 12, Iss 1, Pp 1-9 (2022) |
op_relation |
https://doi.org/10.1038/s41598-022-14684-y https://doaj.org/toc/2045-2322 doi:10.1038/s41598-022-14684-y 2045-2322 https://doaj.org/article/2e0b9389d9b9458baa33d56b6bc54aee |
op_doi |
https://doi.org/10.1038/s41598-022-14684-y |
container_title |
Scientific Reports |
container_volume |
12 |
container_issue |
1 |
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1766019028364558336 |