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 deglaciation. Climate change during the Younger Dryas was abrupt, and thus provides insights into the sensitivity of the climate system to perturbations. The sudden Younger Dryas cooling...
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Online Access: | https://hdl.handle.net/1983/abf6e4c3-3c13-4b07-b14b-3cf5d5baf144 https://research-information.bris.ac.uk/en/publications/abf6e4c3-3c13-4b07-b14b-3cf5d5baf144 https://doi.org/10.1038/ngeo2557 https://research-information.bris.ac.uk/ws/files/80785311/Renssen_etal_resubm_NatureGS_Submitted.pdf http://www.scopus.com/inward/record.url?scp=84948398339&partnerID=8YFLogxK |
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ftubristolcris:oai:research-information.bris.ac.uk:publications/abf6e4c3-3c13-4b07-b14b-3cf5d5baf144 2024-05-12T08:08:02+00:00 Multiple causes of the Younger Dryas cold period Renssen, Hans Mairesse, Aurelien Goosse, Hugues Mathiot, Pierre Heiri, Oliver Roche, Didier M. Nisancioglu, Kerim H. Valdes, Paul J. 2015-12 application/pdf https://hdl.handle.net/1983/abf6e4c3-3c13-4b07-b14b-3cf5d5baf144 https://research-information.bris.ac.uk/en/publications/abf6e4c3-3c13-4b07-b14b-3cf5d5baf144 https://doi.org/10.1038/ngeo2557 https://research-information.bris.ac.uk/ws/files/80785311/Renssen_etal_resubm_NatureGS_Submitted.pdf http://www.scopus.com/inward/record.url?scp=84948398339&partnerID=8YFLogxK eng eng https://research-information.bris.ac.uk/en/publications/abf6e4c3-3c13-4b07-b14b-3cf5d5baf144 info:eu-repo/semantics/openAccess Renssen , H , Mairesse , A , Goosse , H , Mathiot , P , Heiri , O , Roche , D M , Nisancioglu , K H & Valdes , P J 2015 , ' Multiple causes of the Younger Dryas cold period ' , Nature Geoscience , vol. 8 , no. 12 , pp. 946-949 . https://doi.org/10.1038/ngeo2557 article 2015 ftubristolcris https://doi.org/10.1038/ngeo2557 2024-04-17T14:18:44Z The Younger Dryas cooling event disrupted the overall warming trend in the North Atlantic region during the last deglaciation. Climate change during the Younger Dryas was abrupt, 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 discharges. However, alternative explanations such as strong negative radiative forcing and a shift in atmospheric circulation have also been offered. Here we investigate the importance of these different 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 University of Bristol: Bristol Research Nature Geoscience 8 12 946 949 |
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Open Polar |
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University of Bristol: Bristol Research |
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ftubristolcris |
language |
English |
description |
The Younger Dryas cooling event disrupted the overall warming trend in the North Atlantic region during the last deglaciation. Climate change during the Younger Dryas was abrupt, 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 discharges. However, alternative explanations such as strong negative radiative forcing and a shift in atmospheric circulation have also been offered. Here we investigate the importance of these different 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. |
format |
Article in Journal/Newspaper |
author |
Renssen, Hans Mairesse, Aurelien Goosse, Hugues Mathiot, Pierre Heiri, Oliver Roche, Didier M. Nisancioglu, Kerim H. Valdes, Paul J. |
spellingShingle |
Renssen, Hans Mairesse, Aurelien Goosse, Hugues Mathiot, Pierre Heiri, Oliver Roche, Didier M. Nisancioglu, Kerim H. Valdes, Paul J. Multiple causes of the Younger Dryas cold period |
author_facet |
Renssen, Hans Mairesse, Aurelien 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 |
publishDate |
2015 |
url |
https://hdl.handle.net/1983/abf6e4c3-3c13-4b07-b14b-3cf5d5baf144 https://research-information.bris.ac.uk/en/publications/abf6e4c3-3c13-4b07-b14b-3cf5d5baf144 https://doi.org/10.1038/ngeo2557 https://research-information.bris.ac.uk/ws/files/80785311/Renssen_etal_resubm_NatureGS_Submitted.pdf http://www.scopus.com/inward/record.url?scp=84948398339&partnerID=8YFLogxK |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
Renssen , H , Mairesse , A , Goosse , H , Mathiot , P , Heiri , O , Roche , D M , Nisancioglu , K H & Valdes , P J 2015 , ' Multiple causes of the Younger Dryas cold period ' , Nature Geoscience , vol. 8 , no. 12 , pp. 946-949 . https://doi.org/10.1038/ngeo2557 |
op_relation |
https://research-information.bris.ac.uk/en/publications/abf6e4c3-3c13-4b07-b14b-3cf5d5baf144 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1038/ngeo2557 |
container_title |
Nature Geoscience |
container_volume |
8 |
container_issue |
12 |
container_start_page |
946 |
op_container_end_page |
949 |
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