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dc.contributor.author
Voigt, Ines
dc.contributor.author
Chiessi, Cristiano Mazur
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dc.contributor.author
Piola, Alberto Ricardo
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dc.contributor.author
Henrich, Rüdiger
dc.date.available
2019-11-28T19:30:22Z
dc.date.issued
2016-12
dc.identifier.citation
Voigt, Ines; Chiessi, Cristiano Mazur; Piola, Alberto Ricardo; Henrich, Rüdiger; Holocene changes in Antarctic Intermediate Water flow strength in the Southwest Atlantic; Elsevier Science; Palaeogeography, Palaeoclimatology, Palaeoecology; 463; 12-2016; 60-67
dc.identifier.issn
0031-0182
dc.identifier.uri
http://hdl.handle.net/11336/90814
dc.description.abstract
Antarctic Intermediate Water (AAIW) is an essential component of the Atlantic meridional overturning circulation (AMOC) contributing to balance the southward flow of North Atlantic Deep Water (NADW). However, the role of AAIW in Holocene abrupt climate changes remains poorly understood. Here we reconstruct changes in the flow strength of AAIW based on a high temporal resolution paleocurrent record from the Southwest Atlantic. Superimposed on a slight increase in AAIW strength at ~ 7 ka BP, a succession of millennial-scale AAIW variations is recognized in our paleocurrent records indicating a highly variable intermediate water circulation throughout the Holocene. Although variations in the strength and position of the Southern Westerlies Winds (SWW) are proposed to greatly influence the formation and circulation of AAIW, we cannot confirm such a potential SWW-AAIW linkage since our records of AAIW flow strength do not correlate to Holocene shifts of the SWW across the Atlantic. However, our data shows a good correspondence with abrupt variations in the AMOC with enhanced (reduced) northward advection of AAIW during periods of reduced (enhanced) NADW circulation. These results provide evidence for a Holocene AAIW-NADW see-saw. Thus, although the exact forcing mechanism remains unresolved, we suggest that Holocene perturbations in AAIW exerted a significant impact on the AMOC.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Elsevier Science
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dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
Antarctic Intermediate Water
dc.subject
Southwest Atlantic
dc.subject
Holocene
dc.subject
North Atlantic Deep Water
dc.subject
AAIW-NADW sea saw
dc.subject
Sortable Silt
dc.subject.classification
Oceanografía, Hidrología, Recursos Hídricos
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dc.subject.classification
Ciencias de la Tierra y relacionadas con el Medio Ambiente
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dc.subject.classification
CIENCIAS NATURALES Y EXACTAS
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dc.title
Holocene changes in Antarctic Intermediate Water flow strength in the Southwest Atlantic
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2019-11-21T17:36:52Z
dc.journal.volume
463
dc.journal.pagination
60-67
dc.journal.pais
Países Bajos
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dc.journal.ciudad
Amsterdam
dc.description.fil
Fil: Voigt, Ines. Universitat Bremen; Alemania
dc.description.fil
Fil: Chiessi, Cristiano Mazur. Universidade de Sao Paulo; Brasil
dc.description.fil
Fil: Piola, Alberto Ricardo. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Ministerio de Defensa. Armada Argentina. Servicio de Hidrografía Naval; Argentina
dc.description.fil
Fil: Henrich, Rüdiger. Universitat Bremen; Alemania
dc.journal.title
Palaeogeography, Palaeoclimatology, Palaeoecology
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dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S0031018216305089
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1016/j.palaeo.2016.09.018
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