Show simple item record

dc.contributor.authorDe Pol-Holz, Ricardo
dc.contributor.authorUlloa, Osvaldo
dc.contributor.authorLamy, Frank
dc.contributor.authorDezileau, Laurent
dc.contributor.authorSabatier, Pierre
dc.contributor.authorHebbeln, Dierk
dc.date.accessioned2010-05-13T12:51:04Z
dc.date.available2010-05-13T12:51:04Z
dc.date.issued2007-05-01
dc.identifier.citationPaleoceanography 22 (2007): PA2207en_US
dc.identifier.urihttp://hdl.handle.net/1912/3446
dc.descriptionAuthor Posting. © American Geophysical Union, 2007. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Paleoceanography 22 (2007): PA2207, doi:10.1029/2006PA001308.en_US
dc.description.abstractWe present high-resolution bulk sedimentary δ 15N data from the southern edge of the present-day oxygen minimum zone of the eastern South Pacific. The record is interpreted as representing changes in water column nitrogen removal during the last 70,000 years. We found significant fluctuations in the isotopic signal that suggest major reorganizations of the oxygen minimum zone at millennial timescales. These fluctuations were not related to other millennial-scale changes like the Northern Hemisphere's Dansgaard-Oeschger climate swings or local changes in primary productivity, so appear to be dictated by the Southern Hemisphere's climate rhythm. This is preliminarily corroborated by an overall agreement between our δ 15N data and the sedimentary proxy of ice sheet dynamics in Patagonia, which is in turn correlated with surface water properties at the midlatitude subduction region of the eastern South Pacific intermediate waters. Finally, potential implications on late Quaternary changes in atmospheric CO2 concentrations are discussed.en_US
dc.description.sponsorshipThis work was funded by the Chilean National Commission for Scientific and Technological Research (CONICYT) through the FONDAP Program and by the Fundacio´n Andes. Additional support was provided by the German Ministry for Science and Education through the PUCK project. R.D.P.H. was supported by graduate fellowships coming from Fundacio´n Andes, CONICYT, and MECESUP/UCO2002.en_US
dc.format.mimetypeapplication/pdf
dc.language.isoen_USen_US
dc.publisherAmerican Geophysical Unionen_US
dc.relation.urihttp://dx.doi.org/10.1029/2006PA001308
dc.subjectEastern South Pacificen_US
dc.subjectDenitrificationen_US
dc.subjectLate Quaternaryen_US
dc.titleLate Quaternary variability of sedimentary nitrogen isotopes in the eastern South Pacific Oceanen_US
dc.typeArticleen_US
dc.identifier.doi10.1029/2006PA001308


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record