Testing the Tropical Trigger Hypothesis of Abrupt Climate Variability
Dansgaard-Oeschger oscillations (DOs) are abrupt shifts in climate, which are dramatic temperature fluctuations observed in Greenland and recorded globally. These abrupt changes are associated with the slowing and shutting down of the Atlantic Meridional Overturning Circulation (AMOC), but despite t...
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crfrontiers:10.3389/feart.2021.669885 2024-02-11T10:04:22+01:00 Testing the Tropical Trigger Hypothesis of Abrupt Climate Variability Oughton, Jack W. Urrego, Dunia H. Natural Environment Research Council 2021 http://dx.doi.org/10.3389/feart.2021.669885 https://www.frontiersin.org/articles/10.3389/feart.2021.669885/full unknown Frontiers Media SA https://creativecommons.org/licenses/by/4.0/ Frontiers in Earth Science volume 9 ISSN 2296-6463 General Earth and Planetary Sciences journal-article 2021 crfrontiers https://doi.org/10.3389/feart.2021.669885 2024-01-26T09:59:00Z Dansgaard-Oeschger oscillations (DOs) are abrupt shifts in climate, which are dramatic temperature fluctuations observed in Greenland and recorded globally. These abrupt changes are associated with the slowing and shutting down of the Atlantic Meridional Overturning Circulation (AMOC), but despite their importance the driving forces of DOs are not fully understood. Here we assess the role of the AMOC during DOs, the Northern vs Southern Hemisphere control on AMOC, and the possibility of neotropical moisture as a driver for abrupt climate variability. During DOs, South America has recorded a disparity between the degree of warming, and the change in precipitation at different sites. Based on our current understanding, we propose likely oceanic and continental changes in tropical South America that can help disentangle the triggers of these events. With the margins of error associated with dating sources of palaeo-data, the need for an independent chronology with multiple proxies recorded in the same record, could offer the information needed to understand the driving forces of DOs. Article in Journal/Newspaper Greenland Frontiers (Publisher) Greenland Frontiers in Earth Science 9 |
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General Earth and Planetary Sciences |
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General Earth and Planetary Sciences Oughton, Jack W. Urrego, Dunia H. Testing the Tropical Trigger Hypothesis of Abrupt Climate Variability |
topic_facet |
General Earth and Planetary Sciences |
description |
Dansgaard-Oeschger oscillations (DOs) are abrupt shifts in climate, which are dramatic temperature fluctuations observed in Greenland and recorded globally. These abrupt changes are associated with the slowing and shutting down of the Atlantic Meridional Overturning Circulation (AMOC), but despite their importance the driving forces of DOs are not fully understood. Here we assess the role of the AMOC during DOs, the Northern vs Southern Hemisphere control on AMOC, and the possibility of neotropical moisture as a driver for abrupt climate variability. During DOs, South America has recorded a disparity between the degree of warming, and the change in precipitation at different sites. Based on our current understanding, we propose likely oceanic and continental changes in tropical South America that can help disentangle the triggers of these events. With the margins of error associated with dating sources of palaeo-data, the need for an independent chronology with multiple proxies recorded in the same record, could offer the information needed to understand the driving forces of DOs. |
author2 |
Natural Environment Research Council |
format |
Article in Journal/Newspaper |
author |
Oughton, Jack W. Urrego, Dunia H. |
author_facet |
Oughton, Jack W. Urrego, Dunia H. |
author_sort |
Oughton, Jack W. |
title |
Testing the Tropical Trigger Hypothesis of Abrupt Climate Variability |
title_short |
Testing the Tropical Trigger Hypothesis of Abrupt Climate Variability |
title_full |
Testing the Tropical Trigger Hypothesis of Abrupt Climate Variability |
title_fullStr |
Testing the Tropical Trigger Hypothesis of Abrupt Climate Variability |
title_full_unstemmed |
Testing the Tropical Trigger Hypothesis of Abrupt Climate Variability |
title_sort |
testing the tropical trigger hypothesis of abrupt climate variability |
publisher |
Frontiers Media SA |
publishDate |
2021 |
url |
http://dx.doi.org/10.3389/feart.2021.669885 https://www.frontiersin.org/articles/10.3389/feart.2021.669885/full |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland |
genre_facet |
Greenland |
op_source |
Frontiers in Earth Science volume 9 ISSN 2296-6463 |
op_rights |
https://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.3389/feart.2021.669885 |
container_title |
Frontiers in Earth Science |
container_volume |
9 |
_version_ |
1790600962350514176 |