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dc.contributor.authorKleiven, Helga (Kikki) Flescheeng
dc.contributor.authorJansen, Eysteineng
dc.contributor.authorCurry, W. B.eng
dc.contributor.authorHodell, David A.eng
dc.contributor.authorVenz, K. A.eng
dc.date.accessioned2004-07-29T12:16:05Z
dc.date.accessioned2004-08-03T12:58:01Z
dc.date.accessioned2004-08-26T11:58:24Z
dc.date.available2004-07-29T12:16:05Z
dc.date.available2004-08-03T12:58:01Z
dc.date.available2004-08-26T11:58:24Z
dc.date.issued2003-02-19eng
dc.identifier.citationPaleoceanography 2003 18(1): 1008en
dc.identifier.issn0883-8305 (print ISSN)eng
dc.identifier.urihttp://hdl.handle.net/1956/402
dc.description.abstractMid-Pleistocene benthic ∂18O and ∂13C time series from the North Atlantic site 983 and Ceara Rise site 928 are compared to an array of existing isotopic records spanning the Atlantic basin and the geographic extremes of the North Atlantic Deep Water/Southern Ocean Water interface during both glacial and interglacial periods. This comparison allows the persistent millennial-scale intermediate depth North Atlantic ventilation changes recorded at site 983 to be placed within the context of the longer period water mass reorganizations taking place throughout the mid-Pleistocene. Our benthic ∂13C results suggest that the intermediate depth North Atlantic experienced millennial-scale changes in ventilation throughout the mid-Pleistocene climate shift. The times of poorest ventilation (low benthic ∂13C) persisted for only a few millennia and were associated with rapid decreases in benthic ∂18O, suggesting that ice sheet decay and melt water induced salinity changes were effective at throttling deep water production in the North Atlantic throughout the mid-Pleistocene. Similar but less pronounced decreases in the ∂13C of the middepth waters also punctuated interglacials, suggesting that large ice sheet fluctuations do not explain all of the observed thermohaline circulation mode shifts in the North Atlantic. Meanwhile, on orbital timescales, glacial deep to intermediate water ∂13C gradients evolved after ~0.95 Ma. Taken together, these observations provide a number of new constraints for understanding the timing and evolution of deep water circulation changes across the mid-Pleistocene.en
dc.format.extent49002 byteseng
dc.format.extent737814 byteseng
dc.format.extent166 byteseng
dc.format.mimetypetext/plaineng
dc.format.mimetypeapplication/pdfeng
dc.format.mimetypetext/plaineng
dc.language.isoengeng
dc.publisherAmerican Geophysical Unioneng
dc.subjectMid-Pleistoceneeng
dc.subjectStable isotopeseng
dc.subjectNorth Atlanticeng
dc.titleAtlantic Ocean thermohaline circulation changes on orbital to suborbital timescales during the mid-Pleistoceneeng
dc.typeJournal articleeng
dc.typePeer reviewedeng
dc.rights.holderCopyright the American Geophysical Union
bora.peerreviewedPeer reviewedeng
bibo.doihttp://dx.doi.org/10.1029/2001PA000629eng
dc.identifier.doi10.1029/2001pa000629


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