Repeated near-collapse of the Pliocene sea surface temperature gradient in the North Atlantic
Autor(a) principal: | |
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Data de Publicação: | 2020 |
Outros Autores: | , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | http://hdl.handle.net/10400.1/14130 |
Resumo: | Sea surface temperature (SST) is used to infer past changes in the state of the climate system. Here we use a combination of newly generated and published organic paleothermometer records, together with novel high‐resolution benthic foraminiferal δ18O stratigraphy, from four sites in the midlatitude North Atlantic (41–58°N) to reconstruct the long‐term evolution of the latitudinal SST gradient during the Pliocene and early Pleistocene (4.0 to 2.4 Myr), the last time atmospheric CO2 reached concentrations above 400 ppmv. We demonstrate that the latitudinal SST gradient in the North Atlantic nearly collapsed twice during this period. We conclude that the latitudinal SST gradient in the midlatitude North Atlantic has two end‐members: a maximum as existing at present and a minimum that existed during certain periods of the (late) Pliocene. Our results suggest that the 400‐ppmv Pliocene world was more dynamic than currently thought. |
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Repeated near-collapse of the Pliocene sea surface temperature gradient in the North AtlanticPlioceneNorth AtlanticIODPSea-surface temperatureAMOCSea surface temperature (SST) is used to infer past changes in the state of the climate system. Here we use a combination of newly generated and published organic paleothermometer records, together with novel high‐resolution benthic foraminiferal δ18O stratigraphy, from four sites in the midlatitude North Atlantic (41–58°N) to reconstruct the long‐term evolution of the latitudinal SST gradient during the Pliocene and early Pleistocene (4.0 to 2.4 Myr), the last time atmospheric CO2 reached concentrations above 400 ppmv. We demonstrate that the latitudinal SST gradient in the North Atlantic nearly collapsed twice during this period. We conclude that the latitudinal SST gradient in the midlatitude North Atlantic has two end‐members: a maximum as existing at present and a minimum that existed during certain periods of the (late) Pliocene. Our results suggest that the 400‐ppmv Pliocene world was more dynamic than currently thought.FCT: IF/01500/2014, UID/Multi/04326/2019.SapientiaNaafs, B. David A.Voelker, AntjeKaras, CyrusAndersen, NilsJ. Sierro, Francisco2020-11-01T01:30:12Z2020-05-012020-07-23T15:05:32Z2020-05-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10400.1/14130engcv-prod-167645810.1029/2020PA003905info:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2023-07-24T10:26:22Zoai:sapientia.ualg.pt:10400.1/14130Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T20:05:10.587451Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse |
dc.title.none.fl_str_mv |
Repeated near-collapse of the Pliocene sea surface temperature gradient in the North Atlantic |
title |
Repeated near-collapse of the Pliocene sea surface temperature gradient in the North Atlantic |
spellingShingle |
Repeated near-collapse of the Pliocene sea surface temperature gradient in the North Atlantic Naafs, B. David A. Pliocene North Atlantic IODP Sea-surface temperature AMOC |
title_short |
Repeated near-collapse of the Pliocene sea surface temperature gradient in the North Atlantic |
title_full |
Repeated near-collapse of the Pliocene sea surface temperature gradient in the North Atlantic |
title_fullStr |
Repeated near-collapse of the Pliocene sea surface temperature gradient in the North Atlantic |
title_full_unstemmed |
Repeated near-collapse of the Pliocene sea surface temperature gradient in the North Atlantic |
title_sort |
Repeated near-collapse of the Pliocene sea surface temperature gradient in the North Atlantic |
author |
Naafs, B. David A. |
author_facet |
Naafs, B. David A. Voelker, Antje Karas, Cyrus Andersen, Nils J. Sierro, Francisco |
author_role |
author |
author2 |
Voelker, Antje Karas, Cyrus Andersen, Nils J. Sierro, Francisco |
author2_role |
author author author author |
dc.contributor.none.fl_str_mv |
Sapientia |
dc.contributor.author.fl_str_mv |
Naafs, B. David A. Voelker, Antje Karas, Cyrus Andersen, Nils J. Sierro, Francisco |
dc.subject.por.fl_str_mv |
Pliocene North Atlantic IODP Sea-surface temperature AMOC |
topic |
Pliocene North Atlantic IODP Sea-surface temperature AMOC |
description |
Sea surface temperature (SST) is used to infer past changes in the state of the climate system. Here we use a combination of newly generated and published organic paleothermometer records, together with novel high‐resolution benthic foraminiferal δ18O stratigraphy, from four sites in the midlatitude North Atlantic (41–58°N) to reconstruct the long‐term evolution of the latitudinal SST gradient during the Pliocene and early Pleistocene (4.0 to 2.4 Myr), the last time atmospheric CO2 reached concentrations above 400 ppmv. We demonstrate that the latitudinal SST gradient in the North Atlantic nearly collapsed twice during this period. We conclude that the latitudinal SST gradient in the midlatitude North Atlantic has two end‐members: a maximum as existing at present and a minimum that existed during certain periods of the (late) Pliocene. Our results suggest that the 400‐ppmv Pliocene world was more dynamic than currently thought. |
publishDate |
2020 |
dc.date.none.fl_str_mv |
2020-11-01T01:30:12Z 2020-05-01 2020-07-23T15:05:32Z 2020-05-01T00:00:00Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://hdl.handle.net/10400.1/14130 |
url |
http://hdl.handle.net/10400.1/14130 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
cv-prod-1676458 10.1029/2020PA003905 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.source.none.fl_str_mv |
reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação instacron:RCAAP |
instname_str |
Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
instacron_str |
RCAAP |
institution |
RCAAP |
reponame_str |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
collection |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
repository.name.fl_str_mv |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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1799133291318607872 |