Evolving southwest African response to abrupt deglacial North Atlantic climate change events
International audience Climate change during the last deglaciation was strongly influenced by the 'bipolar seesaw', producing antiphase climate responses between the North and South Atlantic. However, mounting evidence demands refinements of this model, with the occurrence of abrupt events...
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ftccsdartic:oai:HAL:hal-01817611v1 2023-05-15T17:29:27+02:00 Evolving southwest African response to abrupt deglacial North Atlantic climate change events Chase, Brian Boom, Arnoud Carré, Andrew S. Carr, Matthieu Chevalier, Manuel Meadows, Michael E. Pedro, Joel B. Stager, J.Curt Reimer, Paula J. Institut des Sciences de l'Evolution de Montpellier (UMR ISEM) École pratique des hautes études (EPHE) Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Montpellier (UM)-Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Centre National de la Recherche Scientifique (CNRS)-Institut de recherche pour le développement IRD : UR226 European Project: 258657,EC:FP7:ERC,ERC-2010-StG_20091028,HYRAX(2010) 2015-08 https://hal.umontpellier.fr/hal-01817611 https://doi.org/10.1016/j.quascirev.2015.05.023 en eng HAL CCSD Elsevier info:eu-repo/semantics/altIdentifier/doi/10.1016/j.quascirev.2015.05.023 info:eu-repo/grantAgreement/EC/FP7/258657/EU/Rock Hyrax Middens and Climate Change in Southern Africa during the last 50,000 years/HYRAX hal-01817611 https://hal.umontpellier.fr/hal-01817611 doi:10.1016/j.quascirev.2015.05.023 ISSN: 0277-3791 Quaternary Science Reviews https://hal.umontpellier.fr/hal-01817611 Quaternary Science Reviews, Elsevier, 2015, 121, pp.132 - 136. ⟨10.1016/j.quascirev.2015.05.023⟩ Southern Africa Palaeoclimate Hyrax middens Bipolar seesaw Atlantic overturning meridional circulation [SDE.MCG]Environmental Sciences/Global Changes info:eu-repo/semantics/article Journal articles 2015 ftccsdartic https://doi.org/10.1016/j.quascirev.2015.05.023 2021-11-21T02:00:32Z International audience Climate change during the last deglaciation was strongly influenced by the 'bipolar seesaw', producing antiphase climate responses between the North and South Atlantic. However, mounting evidence demands refinements of this model, with the occurrence of abrupt events in southern low to mid latitudes occurring in-phase with North Atlantic climate. Improved constraints on the northesouth phasing and spatial extent of these events are therefore critical to understanding the mechanisms that propagate abrupt events within the climate system. We present a 19,400 year multi-proxy record of climate change obtained from a rock hyrax midden in southernmost Africa. Arid anomalies in phase with the Younger Dryas and 8.2 ka events are apparent, indicating a clear shift in the influence of the bipolar seesaw, which diminished as the Earth warmed, and was succeeded after ~14.6 ka by the emergence of a dominant interhemispheric atmospheric teleconnection. Article in Journal/Newspaper North Atlantic Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Quaternary Science Reviews 121 132 136 |
institution |
Open Polar |
collection |
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
op_collection_id |
ftccsdartic |
language |
English |
topic |
Southern Africa Palaeoclimate Hyrax middens Bipolar seesaw Atlantic overturning meridional circulation [SDE.MCG]Environmental Sciences/Global Changes |
spellingShingle |
Southern Africa Palaeoclimate Hyrax middens Bipolar seesaw Atlantic overturning meridional circulation [SDE.MCG]Environmental Sciences/Global Changes Chase, Brian Boom, Arnoud Carré, Andrew S. Carr, Matthieu Chevalier, Manuel Meadows, Michael E. Pedro, Joel B. Stager, J.Curt Reimer, Paula J. Evolving southwest African response to abrupt deglacial North Atlantic climate change events |
topic_facet |
Southern Africa Palaeoclimate Hyrax middens Bipolar seesaw Atlantic overturning meridional circulation [SDE.MCG]Environmental Sciences/Global Changes |
description |
International audience Climate change during the last deglaciation was strongly influenced by the 'bipolar seesaw', producing antiphase climate responses between the North and South Atlantic. However, mounting evidence demands refinements of this model, with the occurrence of abrupt events in southern low to mid latitudes occurring in-phase with North Atlantic climate. Improved constraints on the northesouth phasing and spatial extent of these events are therefore critical to understanding the mechanisms that propagate abrupt events within the climate system. We present a 19,400 year multi-proxy record of climate change obtained from a rock hyrax midden in southernmost Africa. Arid anomalies in phase with the Younger Dryas and 8.2 ka events are apparent, indicating a clear shift in the influence of the bipolar seesaw, which diminished as the Earth warmed, and was succeeded after ~14.6 ka by the emergence of a dominant interhemispheric atmospheric teleconnection. |
author2 |
Institut des Sciences de l'Evolution de Montpellier (UMR ISEM) École pratique des hautes études (EPHE) Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Montpellier (UM)-Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Centre National de la Recherche Scientifique (CNRS)-Institut de recherche pour le développement IRD : UR226 European Project: 258657,EC:FP7:ERC,ERC-2010-StG_20091028,HYRAX(2010) |
format |
Article in Journal/Newspaper |
author |
Chase, Brian Boom, Arnoud Carré, Andrew S. Carr, Matthieu Chevalier, Manuel Meadows, Michael E. Pedro, Joel B. Stager, J.Curt Reimer, Paula J. |
author_facet |
Chase, Brian Boom, Arnoud Carré, Andrew S. Carr, Matthieu Chevalier, Manuel Meadows, Michael E. Pedro, Joel B. Stager, J.Curt Reimer, Paula J. |
author_sort |
Chase, Brian |
title |
Evolving southwest African response to abrupt deglacial North Atlantic climate change events |
title_short |
Evolving southwest African response to abrupt deglacial North Atlantic climate change events |
title_full |
Evolving southwest African response to abrupt deglacial North Atlantic climate change events |
title_fullStr |
Evolving southwest African response to abrupt deglacial North Atlantic climate change events |
title_full_unstemmed |
Evolving southwest African response to abrupt deglacial North Atlantic climate change events |
title_sort |
evolving southwest african response to abrupt deglacial north atlantic climate change events |
publisher |
HAL CCSD |
publishDate |
2015 |
url |
https://hal.umontpellier.fr/hal-01817611 https://doi.org/10.1016/j.quascirev.2015.05.023 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
ISSN: 0277-3791 Quaternary Science Reviews https://hal.umontpellier.fr/hal-01817611 Quaternary Science Reviews, Elsevier, 2015, 121, pp.132 - 136. ⟨10.1016/j.quascirev.2015.05.023⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.quascirev.2015.05.023 info:eu-repo/grantAgreement/EC/FP7/258657/EU/Rock Hyrax Middens and Climate Change in Southern Africa during the last 50,000 years/HYRAX hal-01817611 https://hal.umontpellier.fr/hal-01817611 doi:10.1016/j.quascirev.2015.05.023 |
op_doi |
https://doi.org/10.1016/j.quascirev.2015.05.023 |
container_title |
Quaternary Science Reviews |
container_volume |
121 |
container_start_page |
132 |
op_container_end_page |
136 |
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1766123584898465792 |