English   español  
Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/216661
logo share SHARE logo core CORE   Add this article to your Mendeley library MendeleyBASE

Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL
Exportar a otros formatos:

DC FieldValueLanguage
dc.contributor.authorDiz, Paulaes_ES
dc.contributor.authorCobelo-García, A.es_ES
dc.contributor.authorHernández-Almeida, Ivánes_ES
dc.contributor.authorCorbi, Hugoes_ES
dc.contributor.authorBernasconi, Stefano M.es_ES
dc.identifier.citationPaleoceanography and Paleoclimatology 35(6): e2019PA003789 (2020)es_ES
dc.description15 pages, 5 figureses_ES
dc.description.abstractThe Middle Pleistocene Transition (MPT, ~641–920 ka) represents a period of the Quaternary climate when, in the absence of substantial changes in orbital forcing, the climate progressively shifted to the 100 ka asymmetrical glacial–interglacial cyclicity characterizing the current climate. The causes of this change remain still uncertain but several lines of evidence suggested the carbon storage of the deep ocean played a relevant role. Here we evaluate the contribution of the eastern deep tropical Pacific to the global ocean carbon sequestration and storage between 760 and 1,040 ka. We present multi‐proxy records for export production and the redox environment at the seabed from Ocean Drilling Program Site 1242 located in the deep East Equatorial Pacific. Our data indicate the development of suboxic bottom waters during early marine isotopic stage (MIS) 23 and glacial MIS 22, suggesting the capture and storage of respired carbon. Redox‐sensitive elements suggest the progressive oxygenation of the deep ocean initiated at the end of the glacial MIS 22, continued across deglaciation and ended with the accomplishment of full interglacial MIS 21. We describe this pattern as a “less complete deglacial ventilation” in that it differs from the mid‐late Pleistocene Pacific deep ocean ventilation pattern which occurs during deglaciations. The ventilation of the deep Pacific Ocean extending beyond deglaciation might have contributed to a persistent deep ocean carbon sequestration, which might have resulted in lowered atmospheric CO2 values that could have influenced the internal response of the climate system contributing to the development of the 100 ka climate variabilityes_ES
dc.description.sponsorshipThe laboratory technical assistance of Victor González Guitián to perform elemental analysis was funded by Xunta de Galicia through the program GRC‐ED431C 2017/55. This study was funded by the project CGL2016‐79878‐R (Spanish Ministerio de Economía, Industria y Competividad within the state program Investigación Desarrollo e Innovación Orientada a los Retos de la Sociedad)es_ES
dc.publisherAmerican Geophysical Uniones_ES
dc.relation.isversionofPublisher's versiones_ES
dc.titlePersistent East Equatorial Pacific Carbon Storage at the Middle Pleistocene Transitiones_ES
dc.description.peerreviewedPeer reviewedes_ES
oprm.item.hasRevisionno ko 0 false*
dc.contributor.orcidDiz, Paula [0000-0002-7136-0690]es_ES
dc.contributor.orcidCobelo-García, A. [0000-0003-0510-678X]es_ES
dc.contributor.orcidHernández-Almeida, Iván [0000-0002-9329-8357]es_ES
dc.contributor.orcidCorbi, Hugo [0000-0002-8433-6585]es_ES
dc.contributor.orcidBernasconi, Stefano M. [0000-0001-7672-8856]es_ES
Appears in Collections:(IIM) Artículos
Files in This Item:
File Description SizeFormat 
Persistent_east_equatorial_2020.pdf Embargoed until November 9, 20202,53 MBAdobe PDFThumbnail
View/Open    Request a copy
Show simple item record

WARNING: Items in Digital.CSIC are protected by copyright, with all rights reserved, unless otherwise indicated.