{"xmlId":"8925","NOAAStudyId":"10251","studyName":"Atlantic and Pacific Regional 450 KYr Benthic d13C Stacks","doi":"https://doi.org/10.25921/mvsd-ka32","uuid":"6ce9075d-c3ee-48d0-8758-6101f09e670d","dataPublisher":"NOAA","contactInfo":{"type":"CONTACT INFORMATION","shortName":"DOC/NOAA/NESDIS/NCEI","longName":"National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce ","address":"325 Broadway, E/NE31","city":"Boulder","state":"CO","postalCode":"80305-3328","country":"USA","dataCenterUrl":"https://www.ncei.noaa.gov/products/paleoclimatology","email":"paleo@noaa.gov","phone":"828-271-4800","fax":null,"constraints":"Please cite original publication, online resource, dataset and publication DOIs (where available), and date accessed when using downloaded data. If there is no publication information, please cite investigator, title, online resource, and date accessed. The appearance of external links associated with a dataset does not constitute endorsement by the Department of Commerce/National Oceanic and Atmospheric Administration of external Web sites or the information, products or services contained therein. For other than authorized activities, the Department of Commerce/NOAA does not exercise any editorial control over the information you may find at these locations. These links are provided consistent with the stated purpose of this Department of Commerce/NOAA Web site."},"dataType":"PALEOCEANOGRAPHY","investigators":"Lisiecki, L.E.; Raymo, M.E.; Curry, W.B.","investigatorDetails":[{"firstName":"Lorraine","lastName":"Lisiecki","initials":"L.E.","orcId":"0000-0001-7859-0096"},{"firstName":"Maureen","lastName":"Raymo","initials":"M.E.","orcId":"0000-0001-7967-9105"},{"firstName":"William","lastName":"Curry","initials":"W.B.","orcId":"0000-0003-4608-8880"}],"version":"1.0","funding":[{"fundingAgency":"US National Oceanic and Atmospheric Administration (NOAA)","fundingGrant":null},{"fundingAgency":"US National Science Foundation","fundingGrant":null}],"studyNotes":"The d13C records used in this study are collected from previous studies \nand primarily measured from the epibenthic taxon Cibicidoides wuellerstorfi. \nAll records are placed on a common age model by aligning their benthic d18O \nrecords to the LR04 benthic d18O stack (Lisiecki and Raymo, 2005). \nThe posted data include regional stacks (averages) of benthic d13C (%VPDB) \nfrom shallow North Atlantic sites (DSDP552, ODP980, ODP982, ODP983), \nmid-depth Atlantic sites (ODP925, ODP927, ODP928, GeoB1214), deep Atlantic \nsites (DP929, ODP1089, GeoB1041, GeoB1211), and deep Pacific sites (ODP677, \nODP846, ODP849, RC13-110, V21-146). A proxy for mid-depth NADW (Dd13C_mid) \nis found by subtracting the deep Pacific d13c stack from the mid-depth \nAtlantic d13c stack. \n","onlineResourceLink":"https://www.ncei.noaa.gov/access/paleo-search/study/10251","difMetadataLink":"https://www.ncei.noaa.gov/pub/data/metadata/published/paleo/dif/xml/noaa-ocean-10251.xml","isoMetadataLink":"https://www.ncei.noaa.gov/pub/data/metadata/published/paleo/iso/xml/noaa-ocean-10251.xml","originalSource":null,"dataTypeInformation":"https://www.ncei.noaa.gov/products/paleoclimatology/paleoceanography","studyCode":null,"scienceKeywords":["Meridional Overturning Circulation (MOC)"],"reconstruction":"N","contributionDate":"2010-07-23","entryId":"noaa-ocean-10251","earliestYearBP":450000,"mostRecentYearBP":0,"earliestYearCE":-448050,"mostRecentYearCE":1950,"publication":[{"author":{"name":"Lisiecki, L.E., M.E. Raymo, and W.B. Curry"},"pubYear":2008,"title":"Atlantic overturning responses to Late Pleistocene climate forcings","journal":"Nature","volume":"456","edition":null,"issue":null,"pages":"85-88","reportNumber":null,"citation":"Lisiecki, L.E., M.E. Raymo, and W.B. Curry. 2008. Atlantic overturning responses to Late Pleistocene climate forcings. Nature, 456, 85-88. doi: 10.1038/nature07425","type":"publication","identifier":{"type":"doi","id":"10.1038/nature07425","url":"http://dx.doi.org/10.1038/nature07425"},"abstract":"The factors driving glacial changes in ocean overturning circulation are not well understood. On the basis of a comparison of 20 climate variables over the past four glacial cycles, the SPECMAP project proposed that summer insolation at high northern latitudes (that is, Milankovitch forcing) drives the same sequence of ocean circulation and other climate responses over 100-kyr eccentricity cycles, 41-kyr obliquity cycles and 23-kyr precession cycles. SPECMAP analysed the circulation response at only a few sites in the Atlantic Ocean, however, and the phase of circulation response has been shown to vary by site and orbital band. Here we test the SPECMAP hypothesis by measuring the phase of orbital responses in benthic d13C (a proxy indicator of ocean nutrient content) at 24 sites throughout the Atlantic over the past 425 kyr. On the basis of d13C responses at 3,000-4,010m water depth, we find that maxima in Milankovitch forcing are associated with greater mid-depth overturning in the obliquity band but less overturning in the precession band. This suggests that Atlantic overturning is strongly sensitive to factors beyond ice volume and summer insolation at high northern latitudes. A better understanding of these processes could lead to improvements in model estimates of overturning rates, which range from a 40 per cent increase to a 40 per cent decrease at the Last Glacial Maximum and a 10-50 per cent decrease over the next 140 yr in response to projected increases in atmospheric CO2.","pubRank":"1"}],"site":[{"NOAASiteId":"30612","siteName":"ODP 925","siteCode":null,"mappable":"Y","locationName":"Ocean>Atlantic Ocean>North Atlantic Ocean","geo":{"geoType":"Feature","geometry":{"type":"POINT","coordinates":["4.20415","-43.4889"]},"properties":{"southernmostLatitude":"4.20415","northernmostLatitude":"4.20415","westernmostLongitude":"-43.4889","easternmostLongitude":"-43.4889","minElevationMeters":"-3042","maxElevationMeters":"-3042"}},"paleoData":[{"dataTableName":"ODP925C","NOAADataTableId":"19038","earliestYear":450000,"mostRecentYear":0,"timeUnit":"cal yr BP","earliestYearBP":450000,"mostRecentYearBP":0,"earliestYearCE":-448050,"mostRecentYearCE":1950,"coreLengthMeters":null,"dataTableNotes":null,"species":[],"dataFile":[{"fileUrl":"https://www.ncei.noaa.gov/pub/data/paleo/contributions_by_author/lisiecki2008/lisiecki2008.txt","urlDescription":"Original Data and Full Metadata","linkText":"lisiecki2008.txt","variables":[{"cvDataType":"PALEOCEANOGRAPHY","cvWhat":"age variable>age","cvMaterial":null,"cvError":null,"cvUnit":"time unit>age unit>calendar kiloyear before present","cvSeasonality":null,"cvDetail":null,"cvMethod":null,"cvAdditionalInfo":null,"cvFormat":"Numeric","cvShortName":null},{"cvDataType":"PALEOCEANOGRAPHY","cvWhat":"chemical composition>isotope>isotope ratio>delta 13C","cvMaterial":"biological material>organism>foraminifer>benthic foraminifer>calcareous benthic foraminifer>Cibicidoides sp.>Cibicidoides wuellerstorfi","cvError":null,"cvUnit":"concentration unit>parts per notation unit>parts per thousand>per mil>per mil VPDB","cvSeasonality":null,"cvDetail":"composited","cvMethod":null,"cvAdditionalInfo":"shallow Atlantic sites","cvFormat":"Numeric","cvShortName":null},{"cvDataType":"PALEOCEANOGRAPHY","cvWhat":"chemical composition>isotope>isotope ratio>delta 13C","cvMaterial":"biological material>organism>foraminifer>benthic foraminifer>calcareous benthic foraminifer>Cibicidoides sp.>Cibicidoides wuellerstorfi","cvError":null,"cvUnit":"concentration unit>parts per notation unit>parts per thousand>per mil>per mil VPDB","cvSeasonality":null,"cvDetail":"composited","cvMethod":null,"cvAdditionalInfo":"mid-depth Atlantic sites","cvFormat":"Numeric","cvShortName":null},{"cvDataType":"PALEOCEANOGRAPHY","cvWhat":"chemical composition>isotope>isotope ratio>delta 13C","cvMaterial":"biological material>organism>foraminifer>benthic foraminifer>calcareous benthic foraminifer>Cibicidoides sp.>Cibicidoides wuellerstorfi","cvError":null,"cvUnit":"concentration unit>parts per notation unit>parts per thousand>per mil>per mil VPDB","cvSeasonality":null,"cvDetail":"composited","cvMethod":null,"cvAdditionalInfo":"deep Atlantic sites","cvFormat":"Numeric","cvShortName":null},{"cvDataType":"PALEOCEANOGRAPHY","cvWhat":"chemical composition>isotope>isotope ratio>delta 13C","cvMaterial":"biological material>organism>foraminifer>benthic foraminifer>calcareous benthic foraminifer>Cibicidoides sp.>Cibicidoides wuellerstorfi","cvError":null,"cvUnit":"concentration unit>parts per notation unit>parts per thousand>per mil>per mil VPDB","cvSeasonality":null,"cvDetail":"composited","cvMethod":null,"cvAdditionalInfo":"deep Pacific sites","cvFormat":"Numeric","cvShortName":null},{"cvDataType":"PALEOCEANOGRAPHY","cvWhat":"chemical composition>isotope>isotope ratio>delta 13C","cvMaterial":"biological material>organism>foraminifer>benthic foraminifer>calcareous benthic foraminifer>Cibicidoides sp.>Cibicidoides wuellerstorfi","cvError":null,"cvUnit":"concentration unit>parts per notation unit>parts per thousand>per mil>per mil VPDB","cvSeasonality":null,"cvDetail":"composited","cvMethod":null,"cvAdditionalInfo":"mid-depth Atlantic stack minus deep Pacific stack","cvFormat":"Numeric","cvShortName":null}],"NOAAKeywords":["earth science>paleoclimate>paleocean>carbon isotopes"]},{"fileUrl":"https://www.ncei.noaa.gov/pub/data/paleo/contributions_by_author/lisiecki2008/lisiecki2008.xls","urlDescription":"Original Data and Full Metadata","linkText":"lisiecki2008.xls","variables":[],"NOAAKeywords":["earth science>paleoclimate>paleocean>carbon isotopes"]}]}]}],"reference":{"pastThesaurusSkos":"https://www.ncei.noaa.gov/access/paleo-search/skos/past-thesaurus.rdf","pastThesaurusExplorer":"https://www.ncei.noaa.gov/access/paleo-search/cvterms","gcmdKeywordThesaurus":"https://earthdata.nasa.gov/earth-observation-data/find-data/idn/gcmd-keywords"},"dataLicenseDescription":null,"dataLicenseUrl":null}