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These links are provided consistent with the stated purpose of this Department of Commerce/NOAA Web site.","country":"USA","dataCenterUrl":"https://www.ncdc.noaa.gov/data-access/paleoclimatology-data","email":"paleo@noaa.gov","fax":"303-497-6513","longName":"National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce ","phone":"303-497-6280","postalCode":"80305-3328","shortName":"DOC/NOAA/NESDIS/NCEI","state":"CO","type":"CONTACT INFORMATION"},"contributionDate":"2010-12-29","dataPublisher":"NOAA","dataType":"PALEOCEANOGRAPHY","dataTypeInformation":"https://www.ncdc.noaa.gov/data-access/paleoclimatology-data/datasets/paleoceanography","difMetadataLink":"http://www1.ncdc.noaa.gov/pub/data/metadata/published/paleo/dif/xml/noaa-ocean-10333.xml","doi":null,"earliestYearBP":30185,"earliestYearCE":-28235,"entryId":"noaa-ocean-10333","funding":[{"fundingAgency":"US National Science Foundation","fundingGrant":"OCE-0526278, OCE-0753487"},{"fundingAgency":"Gordon and Betty Moore Foundation","fundingGrant":null}],"investigators":"Muratli, J.M.; Chase, Z.; Mix, A.C.; McManus, J.F.","mostRecentYearBP":155,"mostRecentYearCE":1795,"onlineResourceLink":"https://www.ncdc.noaa.gov/paleo/study/10333","originalSource":null,"publication":[{"abstract":"Antarctic Intermediate Water is, at present, a water mass \nthat brings oxygen to intermediate depths throughout the \nSouthern Hemisphere oceans. Models have suggested that \nintermediate waters had higher concentrations of oxygen \nduring the last glacial period, consistent with globally \nreduced denitrification and increased production of Antarctic \nIntermediate Water. However, some palaeoceanographic \nreconstructions have indicated that production decreased \nin the southeast Pacific Ocean at this time. Here we analyse \nthe concentrations of Re and Mn, the sedimentary concentrations \nof which are controlled by the amount of dissolved oxygen \nat the sea floor, from three sediment cores located along \nthe Chilean margin for the past 30,000 years. Our results \nfrom the cores, which bracket the present-day water-column \nextent of Antarctic Intermediate Water, show that the depth \nrange of well-oxygenated Antarctic Intermediate Water \nincreased off Chile during the Last Glacial Maximum. \nDissolved oxygen content began to decrease approximately \n17,000 years ago, coincident with rapid Antarctic warming \nand a poleward shift of the southern westerly winds. \nOur estimates of productivity from accumulation rates \nof organic carbon and opal do not co-vary with the seafloor \noxygen variations, ruling out local control of seafloor \noxygenation. We conclude that the data are best explained \nby a combination of increased oxygenation and increased \nflux of Antarctic Intermediate Water during the Last \nGlacial Maximum. \n","author":null,"citation":"Muratli, J.M., Z. Chase, A.C. Mix, and J. McManus. 2010. \nIncreased glacial-age ventilation of the Chilean margin \nby Antarctic Intermediate Water. \nNature Geoscience, Vol. 3, pp. 23-26, January 2010. \nPublished online 13 December 2009. \ndoi:10.1038/ngeo715 \n","edition":null,"identifier":{"id":"10.1038/ngeo715","type":"doi","url":"http://dx.doi.org/10.1038/ngeo715"},"issue":null,"journal":"Nature Geoscience","pages":null,"pubRank":"1","pubYear":2010,"reportNumber":null,"title":"Increased glacial-age ventilation of the Chilean margin  by Antarctic Intermediate Water","type":"publication","volume":null}],"reconstruction":"N","scienceKeywords":["Meridional Overturning Circulation (MOC)"],"site":[{"NOAASiteId":"19251","geo":{"geoType":"Feature","geometry":{"coordinates":["-41","-74.45"],"type":"POINT"},"properties":{"easternmostLongitude":"-74.45","maxElevationMeters":"-838","minElevationMeters":"-838","northernmostLatitude":"-41","southernmostLatitude":"-41","westernmostLongitude":"-74.45"}},"locationName":"Ocean>Pacific 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composition>element or single-element molecule>aluminum"},{"cvAdditionalInfo":null,"cvDataType":"PALEOCEANOGRAPHY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":null,"cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"centimeter","cvWhat":"depth variable>depth>depth at sample start"}]},{"NOAAKeywords":["earth science>paleoclimate>paleocean>geochemistry"],"fileUrl":"https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/muratli2010/muratli2010.xls","linkText":"muratli2010.xls","urlDescription":"Original Data and Full Metadata","variables":[]}],"dataTableName":"ODP1235B","dataTableNotes":null,"earliestYear":22581,"earliestYearBP":22581,"earliestYearCE":-20631,"mostRecentYear":179,"mostRecentYearBP":179,"mostRecentYearCE":1771,"species":[],"timeUnit":"cal yr BP"}],"siteName":"ODP1235"}],"studyCode":null,"studyName":"Chilean Margin 30KYr Redox-Sensitive Metals Data ","studyNotes":"Sediment concentration of redox (oxidation-reduction reaction)\nsensitive metals (Re and Mn) from 3 cores along the Chilean Margin \nin the eastern South Pacific, interpreted as a proxy for sea floor \noxygen concentration.  Accumulation rates of organic carbon and opal \nare also included as productivity proxies. \n\n","version":"1.0","xmlId":"9007"}