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A stalagmite test of North Atlantic SST and Iberian hydroclimate linkages over the last two glacial cycles

2018Journal article Open access
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dc.contributor.authorDenniston, Rhawn F.
dc.contributor.authorHouts, Amanda N.
dc.contributor.authorAsmerom, Yemane
dc.contributor.authorWanamaker Jr., Alan D.
dc.contributor.authorHaws, Jonathan
dc.contributor.authorPolyak, Victor J.
dc.contributor.authorThatcher, Diana L.
dc.contributor.authorAltan-Ochir, Setsen
dc.contributor.authorBorowske, Alyssa C.
dc.contributor.authorBreitenbach, Sebastian F. M.
dc.contributor.authorUmmenhofer, Caroline C.
dc.contributor.authorRegala, Frederico T.
dc.contributor.authorBenedetti, Michael M.
dc.contributor.authorBicho, Nuno Gonçalo Viana Pereira Ferreira
dc.date.accessioned2019-05-22T14:26:32Z
dc.date.available2019-05-22T14:26:32Z
dc.date.issued2018
dc.description.abstractClose coupling of Iberian hydroclimate and North Atlantic sea surface temperature (SST) during recent glacial periods has been identified through the analysis of marine sediment and pollen grains co-deposited on the Portuguese continental margin. While offering precisely correlatable records, these time series have lacked a directly dated, site-specific record of continental Iberian climate spanning multiple glacial cycles as a point of comparison. Here we present a high-resolution, multi-proxy (growth dynamics and delta C-13, delta O-18, and delta U-234 values) composite stalagmite record of hydroclimate from two caves in western Portugal across the majority of the last two glacial cycles (similar to 220 ka). At orbital and millennial scales, stalagmite-based proxies for hydroclimate proxies covaried with SST, with elevated delta C-13, delta O-18, and delta U-234 values and/or growth hiatuses indicating re-duced effective moisture coincident with periods of lowered SST during major ice-rafted debris events, in agreement with changes in palynological reconstructions of continental climate. While in many cases the Portuguese stalagmite record can be scaled to SST, in some intervals the magnitudes of stalagmite isotopic shifts, and possibly hydroclimate, appear to have been somewhat decoupled from SST.pt_PT
dc.description.sponsorshipAgência financiadora / Número do subsídio Center for Global and Regional Environmental Research, Cornell College US National Science Foundation BCS-1118155 BCS-1118183 AGS-1804132 IGESPAR Associacao de Estudos Subterraneos e Defesa do Ambientept_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.doi10.5194/cp-14-1893-2018pt_PT
dc.identifier.issn1814-9324
dc.identifier.urihttp://hdl.handle.net/10400.1/12551
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherCopernicus Publicationspt_PT
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/pt_PT
dc.titleA stalagmite test of North Atlantic SST and Iberian hydroclimate linkages over the last two glacial cyclespt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage1913pt_PT
oaire.citation.issue12pt_PT
oaire.citation.startPage1893pt_PT
oaire.citation.titleClimate of the Pastpt_PT
oaire.citation.volume14pt_PT
person.familyNameHaws
person.familyNameBenedetti
person.familyNameBicho
person.givenNameJonathan
person.givenNameMichael
person.givenNameNuno
person.identifierJ-2841-2012
person.identifier.ciencia-idC518-ED9C-7902
person.identifier.ciencia-id8715-EE13-87BA
person.identifier.ciencia-id7619-7089-221C
person.identifier.orcid0000-0002-2047-4524
person.identifier.orcid0000-0002-2900-887X
person.identifier.orcid0000-0001-9655-0549
person.identifier.scopus-author-id8505322400
rcaap.rightsopenAccesspt_PT
rcaap.typearticlept_PT
relation.isAuthorOfPublicatione88995c7-1cdc-4ac4-bc59-57eedc794774
relation.isAuthorOfPublicationbeef6694-dc55-42c4-8f10-299d866ccda2
relation.isAuthorOfPublication95e67113-81f2-40a6-939e-615036a18336
relation.isAuthorOfPublication.latestForDiscoverye88995c7-1cdc-4ac4-bc59-57eedc794774

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