Multiple causes of the Younger Dryas cold period
The Younger Dryas cooling event disrupted the overall warming trend in the North Atlantic region during the last deglaciation1–6. Climate change during the Younger Dryas was abrupt7–9, and thus provides insights into the sensitivity of the climate system to perturbations. The sudden Younger Drya...
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Online Access: | http://hdl.handle.net/2078.1/168233 https://doi.org/10.1038/NGEO2557 |
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ftunistlouisbrus:oai:dial.uclouvain.be:boreal:168233 2024-05-12T08:08:02+00:00 Multiple causes of the Younger Dryas cold period Renssen, Hans Mairesse, Aurélien Goosse, Hugues Mathiot, Pierre Heiri, Oliver Roche, Didier M. Nisancioglu, Kerim H. Valdes, Paul J. UCL - SST/ELI/ELIC - Earth & Climate 2015 http://hdl.handle.net/2078.1/168233 https://doi.org/10.1038/NGEO2557 eng eng Nature Publishing Group boreal:168233 http://hdl.handle.net/2078.1/168233 doi:10.1038/NGEO2557 urn:ISSN:1752-0894 urn:EISSN:1752-0908 info:eu-repo/semantics/openAccess Nature Geoscience, Vol. 8, no.12, p. 946-949 (2015) CISM:CECI 1443 info:eu-repo/semantics/article 2015 ftunistlouisbrus https://doi.org/10.1038/NGEO2557 2024-04-18T17:44:51Z The Younger Dryas cooling event disrupted the overall warming trend in the North Atlantic region during the last deglaciation1–6. Climate change during the Younger Dryas was abrupt7–9, and thus provides insights into the sensitivity of the climate system to perturbations. The sudden Younger Dryas cooling has traditionally been attributed to a shutdown of the Atlantic Meridional Overturning Circulation by meltwater discharges10–13. However, alternative explanations such as strong negative radiative forcing14 and a shift in atmospheric circulation15 have also been oered. Here we investigate the importance of these dierent forcings in coupled climate model experiments constrained by data assimilation.We find that the Younger Dryas climate signal as registered in proxy evidence is best simulated using a combination of processes: a weakened Atlantic Meridional Overturning Circulation, moderate negative radiative forcing and an altered atmospheric circulation. We conclude that none of the individual mechanisms alone provide a plausible explanation for the Younger Dryas cold period.We suggest that the triggers for abrupt climate changes such as the Younger Dryas are more complex than suggested so far, and that studies on the response of the climate system to perturbations should account for this complexity. Article in Journal/Newspaper North Atlantic DIAL@USL-B (Université Saint-Louis, Bruxelles) Nature Geoscience 8 12 946 949 |
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DIAL@USL-B (Université Saint-Louis, Bruxelles) |
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English |
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CISM:CECI 1443 |
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CISM:CECI 1443 Renssen, Hans Mairesse, Aurélien Goosse, Hugues Mathiot, Pierre Heiri, Oliver Roche, Didier M. Nisancioglu, Kerim H. Valdes, Paul J. Multiple causes of the Younger Dryas cold period |
topic_facet |
CISM:CECI 1443 |
description |
The Younger Dryas cooling event disrupted the overall warming trend in the North Atlantic region during the last deglaciation1–6. Climate change during the Younger Dryas was abrupt7–9, and thus provides insights into the sensitivity of the climate system to perturbations. The sudden Younger Dryas cooling has traditionally been attributed to a shutdown of the Atlantic Meridional Overturning Circulation by meltwater discharges10–13. However, alternative explanations such as strong negative radiative forcing14 and a shift in atmospheric circulation15 have also been oered. Here we investigate the importance of these dierent forcings in coupled climate model experiments constrained by data assimilation.We find that the Younger Dryas climate signal as registered in proxy evidence is best simulated using a combination of processes: a weakened Atlantic Meridional Overturning Circulation, moderate negative radiative forcing and an altered atmospheric circulation. We conclude that none of the individual mechanisms alone provide a plausible explanation for the Younger Dryas cold period.We suggest that the triggers for abrupt climate changes such as the Younger Dryas are more complex than suggested so far, and that studies on the response of the climate system to perturbations should account for this complexity. |
author2 |
UCL - SST/ELI/ELIC - Earth & Climate |
format |
Article in Journal/Newspaper |
author |
Renssen, Hans Mairesse, Aurélien Goosse, Hugues Mathiot, Pierre Heiri, Oliver Roche, Didier M. Nisancioglu, Kerim H. Valdes, Paul J. |
author_facet |
Renssen, Hans Mairesse, Aurélien Goosse, Hugues Mathiot, Pierre Heiri, Oliver Roche, Didier M. Nisancioglu, Kerim H. Valdes, Paul J. |
author_sort |
Renssen, Hans |
title |
Multiple causes of the Younger Dryas cold period |
title_short |
Multiple causes of the Younger Dryas cold period |
title_full |
Multiple causes of the Younger Dryas cold period |
title_fullStr |
Multiple causes of the Younger Dryas cold period |
title_full_unstemmed |
Multiple causes of the Younger Dryas cold period |
title_sort |
multiple causes of the younger dryas cold period |
publisher |
Nature Publishing Group |
publishDate |
2015 |
url |
http://hdl.handle.net/2078.1/168233 https://doi.org/10.1038/NGEO2557 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
Nature Geoscience, Vol. 8, no.12, p. 946-949 (2015) |
op_relation |
boreal:168233 http://hdl.handle.net/2078.1/168233 doi:10.1038/NGEO2557 urn:ISSN:1752-0894 urn:EISSN:1752-0908 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1038/NGEO2557 |
container_title |
Nature Geoscience |
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8 |
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12 |
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946 |
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949 |
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1798850904530616320 |