{"NOAAStudyId":"24550","contactInfo":{"address":"325 Broadway, E/NE31","city":"Boulder","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.","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":"2018-07-02","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-24550.xml","doi":null,"earliestYearBP":22165,"earliestYearCE":-20215,"entryId":"noaa-ocean-24550","funding":[{"fundingAgency":"US National Science Foundation","fundingGrant":"OCE-1357529"}],"investigators":"Du, J.; Haley, B.A.; Mix, A.C.","mostRecentYearBP":142,"mostRecentYearCE":1808,"onlineResourceLink":"https://www.ncdc.noaa.gov/paleo/study/24550","originalSource":null,"publication":[{"abstract":"During the last deglaciation (19,000–9,000 years ago), atmospheric CO2 increased by about 80 ppm. Understanding the mechanisms responsible for this change is a central theme of palaeoclimatology, relevant for predicting future CO2 transfers in a warming world. Deglacial CO2 rise hypothetically tapped an accumulated deep Pacific carbon reservoir, but the processes remain elusive as they are underconstrained by existing tracers. Here we report high-resolution authigenic neodymium isotope data in North Pacific sediment cores and infer abyssal Pacific overturning weaker than today during the Last Glacial Maximum but intermittently stronger during steps of deglacial CO2 rise. Radiocarbon evidence suggestive of relatively ‘old’ deglacial deep Pacific water is reinterpreted here as an increase in preformed 14C age of subsurface waters sourced near Antarctica, consistent with movement of aged carbon out of the deep ocean and release of CO2 to the atmosphere during the abyssal flushing events. The timing of neodymium isotope changes suggests that deglacial acceleration of Pacific abyssal circulation tracked Southern Hemisphere warming, sea-ice retreat and increase of mean ocean temperature. The inferred magnitude of circulation changes is consistent with deep Pacific flushing as a significant, and perhaps dominant, control of the deglacial rise of atmospheric CO2.","author":{"name":"Du, Jianghui; Haley, Brian A.; Mix, Alan C.; Walczak, Maureen H.; Praetorius, Summer K."},"citation":"Du, Jianghui; Haley, Brian A.; Mix, Alan C.; Walczak, Maureen H.; Praetorius, Summer K. 2018. Flushing of the deep Pacific Ocean and the deglacial rise of atmospheric CO2 concentrations. Nature Geoscience. . ","edition":null,"identifier":null,"issue":null,"journal":"Nature Geoscience","pages":null,"pubRank":"1","pubYear":2018,"reportNumber":null,"title":"Flushing of the deep Pacific Ocean and the deglacial rise of atmospheric CO2 concentrations","type":"publication","volume":null}],"reconstruction":"N","scienceKeywords":null,"site":[{"NOAASiteId":"53252","geo":{"geoType":"Feature","geometry":{"coordinates":["59.555","-144.1535"],"type":"POINT"},"properties":{"easternmostLongitude":"-144.1535","maxElevationMeters":"-682","minElevationMeters":"-682","northernmostLatitude":"59.555","southernmostLatitude":"59.555","westernmostLongitude":"-144.1535"}},"locationName":"Ocean>Pacific Ocean>North Pacific Ocean>Gulf Of Alaska","mappable":"Y","paleoData":[{"NOAADataTableId":"36653","coreLengthMeters":12,"dataFile":[{"NOAAKeywords":["earth science>paleoclimate>paleocean>radiogenic isotope"],"fileUrl":"https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/du2018/du2018-ew0408-85tc_jc.txt","linkText":"EW0408-85TC/JC Neodymium Data","urlDescription":"NOAA Template File","variables":[{"cvAdditionalInfo":"Site name","cvDataType":"PALEOCEANOGRAPHY","cvDetail":null,"cvError":null,"cvFormat":"Character","cvMaterial":null,"cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":null,"cvWhat":"sampling metadata>notes"},{"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"},{"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 end"},{"cvAdditionalInfo":"uncorrected depth in core","cvDataType":"PALEOCEANOGRAPHY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":null,"cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"centimeter","cvWhat":"depth variable>depth"},{"cvAdditionalInfo":"composite depth","cvDataType":"PALEOCEANOGRAPHY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":null,"cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"centimeter","cvWhat":"depth variable>depth"},{"cvAdditionalInfo":"also 16% quantile age; Bchron bayesian age model","cvDataType":"PALEOCEANOGRAPHY","cvDetail":null,"cvError":"68% confidence interval lower bound","cvFormat":"Numeric","cvMaterial":null,"cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"calendar year before present","cvWhat":"age variable>age"},{"cvAdditionalInfo":"median age; Bchron bayesian age model","cvDataType":"PALEOCEANOGRAPHY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":null,"cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"calendar year before present","cvWhat":"age variable>age"},{"cvAdditionalInfo":"also 84% quantile age; Bchron bayesian age model","cvDataType":"PALEOCEANOGRAPHY","cvDetail":null,"cvError":"68% confidence interval upper bound","cvFormat":"Numeric","cvMaterial":null,"cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"calendar year before present","cvWhat":"age variable>age"},{"cvAdditionalInfo":"authigenic Fe-Mn oxyhydroxide","cvDataType":"PALEOCEANOGRAPHY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":"geological material>identified mineral>oxide and hydroxide minerals","cvMethod":"multiple collector inductively-coupled plasma mass spectrometry","cvSeasonality":null,"cvShortName":null,"cvUnit":"dimensionless","cvWhat":"chemical composition>isotope>isotope ratio>143Nd/144Nd"},{"cvAdditionalInfo":"authigenic Fe-Mn oxyhydroxide","cvDataType":"PALEOCEANOGRAPHY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":"geological material>identified mineral>oxide and hydroxide minerals","cvMethod":"multiple collector inductively-coupled plasma mass spectrometry","cvSeasonality":null,"cvShortName":null,"cvUnit":"epsilon unit","cvWhat":"chemical composition>isotope>isotope ratio>143Nd/144Nd>epsilon neodymium"},{"cvAdditionalInfo":"authigenic Fe-Mn oxyhydroxide; long term external reproducibility","cvDataType":"PALEOCEANOGRAPHY","cvDetail":null,"cvError":"two standard deviations","cvFormat":"Numeric","cvMaterial":"geological material>identified mineral>oxide and hydroxide minerals","cvMethod":"multiple collector inductively-coupled plasma mass spectrometry","cvSeasonality":null,"cvShortName":null,"cvUnit":"epsilon unit","cvWhat":"chemical composition>isotope>isotope ratio>143Nd/144Nd>epsilon neodymium"},{"cvAdditionalInfo":null,"cvDataType":"PALEOCEANOGRAPHY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":"geological material>bulk geological material>sediment","cvMethod":"multiple collector inductively-coupled plasma mass spectrometry","cvSeasonality":null,"cvShortName":null,"cvUnit":"dimensionless","cvWhat":"chemical composition>isotope>isotope ratio>143Nd/144Nd"},{"cvAdditionalInfo":null,"cvDataType":"PALEOCEANOGRAPHY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":"geological material>bulk geological material>sediment","cvMethod":"multiple collector inductively-coupled plasma mass spectrometry","cvSeasonality":null,"cvShortName":null,"cvUnit":"epsilon unit","cvWhat":"chemical composition>isotope>isotope ratio>143Nd/144Nd>epsilon neodymium"},{"cvAdditionalInfo":"long term external reproducibility","cvDataType":"PALEOCEANOGRAPHY","cvDetail":null,"cvError":"two standard deviations","cvFormat":"Numeric","cvMaterial":"geological material>bulk geological material>sediment","cvMethod":"multiple collector inductively-coupled plasma mass spectrometry","cvSeasonality":null,"cvShortName":null,"cvUnit":"epsilon unit","cvWhat":"chemical composition>isotope>isotope ratio>143Nd/144Nd>epsilon neodymium"}]}],"dataTableName":"EW0408-85TC/JC-eNd Du2018","dataTableNotes":"This site is co-located with IODP-U1419","earliestYear":17473,"earliestYearBP":17473,"earliestYearCE":-15523,"mostRecentYear":142,"mostRecentYearBP":142,"mostRecentYearCE":1808,"species":[],"timeUnit":"cal yr BP"}],"siteName":"EW0408-85JC"},{"NOAASiteId":"57142","geo":{"geoType":"Feature","geometry":{"coordinates":["58.77","-144.5"],"type":"POINT"},"properties":{"easternmostLongitude":"-144.5","maxElevationMeters":"-3680","minElevationMeters":"-3680","northernmostLatitude":"58.77","southernmostLatitude":"58.77","westernmostLongitude":"-144.5"}},"locationName":"Ocean>Pacific Ocean>North Pacific Ocean>Gulf Of Alaska","mappable":"Y","paleoData":[{"NOAADataTableId":"36654","coreLengthMeters":14,"dataFile":[{"NOAAKeywords":["earth science>paleoclimate>paleocean>radiogenic isotope"],"fileUrl":"https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/du2018/du2018-ew0408-87jc.txt","linkText":"EW0408-87JC Neodymium Data","urlDescription":"NOAA Template File","variables":[{"cvAdditionalInfo":"also 84% quantile age; Bchron bayesian age model","cvDataType":"PALEOCEANOGRAPHY","cvDetail":null,"cvError":"68% confidence interval upper bound","cvFormat":"Numeric","cvMaterial":null,"cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"calendar year before present","cvWhat":"age variable>age"},{"cvAdditionalInfo":"authigenic Fe-Mn oxyhydroxide","cvDataType":"PALEOCEANOGRAPHY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":"geological material>identified mineral>oxide and hydroxide minerals","cvMethod":"multiple collector inductively-coupled plasma mass spectrometry","cvSeasonality":null,"cvShortName":null,"cvUnit":"dimensionless","cvWhat":"chemical composition>isotope>isotope ratio>143Nd/144Nd"},{"cvAdditionalInfo":"authigenic Fe-Mn oxyhydroxide","cvDataType":"PALEOCEANOGRAPHY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":"geological material>identified mineral>oxide and hydroxide minerals","cvMethod":"multiple collector inductively-coupled plasma mass spectrometry","cvSeasonality":null,"cvShortName":null,"cvUnit":"epsilon unit","cvWhat":"chemical composition>isotope>isotope ratio>143Nd/144Nd>epsilon neodymium"},{"cvAdditionalInfo":"authigenic Fe-Mn oxyhydroxide; long term external reproducibility","cvDataType":"PALEOCEANOGRAPHY","cvDetail":null,"cvError":"two standard deviations","cvFormat":"Numeric","cvMaterial":"geological material>identified mineral>oxide and hydroxide minerals","cvMethod":"multiple collector inductively-coupled plasma mass spectrometry","cvSeasonality":null,"cvShortName":null,"cvUnit":"epsilon unit","cvWhat":"chemical composition>isotope>isotope ratio>143Nd/144Nd>epsilon neodymium"},{"cvAdditionalInfo":null,"cvDataType":"PALEOCEANOGRAPHY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":"geological material>bulk geological material>sediment","cvMethod":"multiple collector inductively-coupled plasma mass spectrometry","cvSeasonality":null,"cvShortName":null,"cvUnit":"dimensionless","cvWhat":"chemical composition>isotope>isotope ratio>143Nd/144Nd"},{"cvAdditionalInfo":null,"cvDataType":"PALEOCEANOGRAPHY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":"geological material>bulk geological material>sediment","cvMethod":"multiple collector inductively-coupled plasma mass spectrometry","cvSeasonality":null,"cvShortName":null,"cvUnit":"epsilon unit","cvWhat":"chemical composition>isotope>isotope ratio>143Nd/144Nd>epsilon neodymium"},{"cvAdditionalInfo":"long term external reproducibility","cvDataType":"PALEOCEANOGRAPHY","cvDetail":null,"cvError":"two standard deviations","cvFormat":"Numeric","cvMaterial":"geological material>bulk geological material>sediment","cvMethod":"multiple collector inductively-coupled plasma mass spectrometry","cvSeasonality":null,"cvShortName":null,"cvUnit":"epsilon unit","cvWhat":"chemical composition>isotope>isotope ratio>143Nd/144Nd>epsilon neodymium"},{"cvAdditionalInfo":"Site name","cvDataType":"PALEOCEANOGRAPHY","cvDetail":null,"cvError":null,"cvFormat":"Character","cvMaterial":null,"cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":null,"cvWhat":"sampling metadata>notes"},{"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"},{"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 end"},{"cvAdditionalInfo":"uncorrected depth in core","cvDataType":"PALEOCEANOGRAPHY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":null,"cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"centimeter","cvWhat":"depth variable>depth"},{"cvAdditionalInfo":"also 16% quantile age; Bchron bayesian age model","cvDataType":"PALEOCEANOGRAPHY","cvDetail":null,"cvError":"68% confidence interval lower bound","cvFormat":"Numeric","cvMaterial":null,"cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"calendar year before present","cvWhat":"age variable>age"},{"cvAdditionalInfo":"median age; Bchron bayesian age model","cvDataType":"PALEOCEANOGRAPHY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":null,"cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"calendar year before present","cvWhat":"age variable>age"}]}],"dataTableName":"EW0408-87JC-eNd Du2018","dataTableNotes":"This site is co-located with IODP-U1418","earliestYear":17761,"earliestYearBP":17761,"earliestYearCE":-15811,"mostRecentYear":711,"mostRecentYearBP":711,"mostRecentYearCE":1239,"species":[],"timeUnit":"cal yr BP"}],"siteName":"EW0408-87JC"},{"NOAASiteId":"57679","geo":{"geoType":"Feature","geometry":{"coordinates":["58.8","-144.5"],"type":"POINT"},"properties":{"easternmostLongitude":"-144.5","maxElevationMeters":"-3703","minElevationMeters":"-3703","northernmostLatitude":"58.8","southernmostLatitude":"58.8","westernmostLongitude":"-144.5"}},"locationName":"Ocean>Pacific Ocean>North Pacific Ocean>Gulf Of Alaska","mappable":"Y","paleoData":[{"NOAADataTableId":"36655","coreLengthMeters":36,"dataFile":[{"NOAAKeywords":["earth science>paleoclimate>paleocean>radiogenic isotope"],"fileUrl":"https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/du2018/du2018-iodp-u1418.txt","linkText":"IODP U1418 Neodymium Data","urlDescription":"NOAA Template File","variables":[{"cvAdditionalInfo":"Site name","cvDataType":"PALEOCEANOGRAPHY","cvDetail":null,"cvError":null,"cvFormat":"Character","cvMaterial":null,"cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":null,"cvWhat":"sampling metadata>notes"},{"cvAdditionalInfo":"IODP Hole number","cvDataType":"PALEOCEANOGRAPHY","cvDetail":null,"cvError":null,"cvFormat":"Character","cvMaterial":null,"cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":null,"cvWhat":"sampling metadata>notes"},{"cvAdditionalInfo":"Depth of the bottom of sample interval on the CCSF_A depth scale","cvDataType":"PALEOCEANOGRAPHY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":null,"cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"meter","cvWhat":"depth variable>depth>depth at sample end"},{"cvAdditionalInfo":"Depth of the top of sample interval on the CCSF_B depth scale","cvDataType":"PALEOCEANOGRAPHY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":null,"cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"meter","cvWhat":"depth variable>depth>depth at sample start"},{"cvAdditionalInfo":"Depth of the bottom of sample interval on the CCSF_B depth scale","cvDataType":"PALEOCEANOGRAPHY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":null,"cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"meter","cvWhat":"depth variable>depth>depth at sample end"},{"cvAdditionalInfo":"Depth of the mid point of sample interval on the CCSF_B depth scale","cvDataType":"PALEOCEANOGRAPHY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":null,"cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"meter","cvWhat":"depth variable>depth"},{"cvAdditionalInfo":"also 16% quantile age; Bchron bayesian age model","cvDataType":"PALEOCEANOGRAPHY","cvDetail":null,"cvError":"68% confidence interval lower bound","cvFormat":"Numeric","cvMaterial":null,"cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"calendar year before present","cvWhat":"age variable>age"},{"cvAdditionalInfo":"median age; Bchron bayesian age model","cvDataType":"PALEOCEANOGRAPHY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":null,"cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"calendar year before present","cvWhat":"age variable>age"},{"cvAdditionalInfo":"also 84% quantile age; Bchron bayesian age model","cvDataType":"PALEOCEANOGRAPHY","cvDetail":null,"cvError":"68% confidence interval upper bound","cvFormat":"Numeric","cvMaterial":null,"cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"calendar year before present","cvWhat":"age variable>age"},{"cvAdditionalInfo":"authigenic Fe-Mn oxyhydroxide","cvDataType":"PALEOCEANOGRAPHY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":"geological material>identified mineral>oxide and hydroxide minerals","cvMethod":"multiple collector inductively-coupled plasma mass spectrometry","cvSeasonality":null,"cvShortName":null,"cvUnit":"dimensionless","cvWhat":"chemical composition>isotope>isotope ratio>143Nd/144Nd"},{"cvAdditionalInfo":"authigenic Fe-Mn oxyhydroxide","cvDataType":"PALEOCEANOGRAPHY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":"geological material>identified mineral>oxide and hydroxide minerals","cvMethod":"multiple collector inductively-coupled plasma mass spectrometry","cvSeasonality":null,"cvShortName":null,"cvUnit":"epsilon unit","cvWhat":"chemical composition>isotope>isotope ratio>143Nd/144Nd>epsilon neodymium"},{"cvAdditionalInfo":"authigenic Fe-Mn oxyhydroxide; long term external reproducibility","cvDataType":"PALEOCEANOGRAPHY","cvDetail":null,"cvError":"two standard deviations","cvFormat":"Numeric","cvMaterial":"geological material>identified mineral>oxide and hydroxide minerals","cvMethod":"multiple collector inductively-coupled plasma mass spectrometry","cvSeasonality":null,"cvShortName":null,"cvUnit":"epsilon unit","cvWhat":"chemical composition>isotope>isotope ratio>143Nd/144Nd>epsilon neodymium"},{"cvAdditionalInfo":null,"cvDataType":"PALEOCEANOGRAPHY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":"geological material>bulk geological material>sediment","cvMethod":"multiple collector inductively-coupled plasma mass spectrometry","cvSeasonality":null,"cvShortName":null,"cvUnit":"dimensionless","cvWhat":"chemical composition>isotope>isotope ratio>143Nd/144Nd"},{"cvAdditionalInfo":null,"cvDataType":"PALEOCEANOGRAPHY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":"geological material>bulk geological material>sediment","cvMethod":"multiple collector inductively-coupled plasma mass spectrometry","cvSeasonality":null,"cvShortName":null,"cvUnit":"epsilon unit","cvWhat":"chemical composition>isotope>isotope ratio>143Nd/144Nd>epsilon neodymium"},{"cvAdditionalInfo":"long term external reproducibility","cvDataType":"PALEOCEANOGRAPHY","cvDetail":null,"cvError":"two standard deviations","cvFormat":"Numeric","cvMaterial":"geological material>bulk geological material>sediment","cvMethod":"multiple collector inductively-coupled plasma mass spectrometry","cvSeasonality":null,"cvShortName":null,"cvUnit":"epsilon unit","cvWhat":"chemical composition>isotope>isotope ratio>143Nd/144Nd>epsilon neodymium"},{"cvAdditionalInfo":"IODP Core number","cvDataType":"PALEOCEANOGRAPHY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":null,"cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":null,"cvWhat":"sampling metadata>notes"},{"cvAdditionalInfo":"IODP Section number","cvDataType":"PALEOCEANOGRAPHY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":null,"cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":null,"cvWhat":"sampling metadata>notes"},{"cvAdditionalInfo":"Depth of the top of sample interval in a section","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"},{"cvAdditionalInfo":"Depth of the bottom of sample interval in a section","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 end"},{"cvAdditionalInfo":"Depth of the top of sample interval on the CSF_A depth scale","cvDataType":"PALEOCEANOGRAPHY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":null,"cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"meter","cvWhat":"depth variable>depth>depth at sample start"},{"cvAdditionalInfo":"Depth of the bottom of sample interval on the CSF_A depth scale","cvDataType":"PALEOCEANOGRAPHY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":null,"cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"meter","cvWhat":"depth variable>depth>depth at sample end"},{"cvAdditionalInfo":"Depth of the top of sample interval on the CCSF_A depth scale","cvDataType":"PALEOCEANOGRAPHY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":null,"cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"meter","cvWhat":"depth variable>depth>depth at sample start"}]}],"dataTableName":"IODP-U1418-eNd Du2018","dataTableNotes":"This site is co-located with EW0408-87JC","earliestYear":21723,"earliestYearBP":21723,"earliestYearCE":-19773,"mostRecentYear":15715,"mostRecentYearBP":15715,"mostRecentYearCE":-13765,"species":[],"timeUnit":"cal yr BP"}],"siteName":"IODP U1418"},{"NOAASiteId":"57680","geo":{"geoType":"Feature","geometry":{"coordinates":["59.6","-144.2"],"type":"POINT"},"properties":{"easternmostLongitude":"-144.2","maxElevationMeters":"-721","minElevationMeters":"-721","northernmostLatitude":"59.6","southernmostLatitude":"59.6","westernmostLongitude":"-144.2"}},"locationName":"Ocean>Pacific Ocean>North Pacific Ocean>Gulf Of Alaska","mappable":"Y","paleoData":[{"NOAADataTableId":"36656","coreLengthMeters":16,"dataFile":[{"NOAAKeywords":["earth science>paleoclimate>paleocean>radiogenic isotope"],"fileUrl":"https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/du2018/du2018-iodp-u1419.txt","linkText":"IODP U1419 Neodymium Data","urlDescription":"NOAA Template File","variables":[{"cvAdditionalInfo":"Site name","cvDataType":"PALEOCEANOGRAPHY","cvDetail":null,"cvError":null,"cvFormat":"Character","cvMaterial":null,"cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":null,"cvWhat":"sampling metadata>notes"},{"cvAdditionalInfo":"IODP Hole number","cvDataType":"PALEOCEANOGRAPHY","cvDetail":null,"cvError":null,"cvFormat":"Character","cvMaterial":null,"cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":null,"cvWhat":"sampling metadata>notes"},{"cvAdditionalInfo":"IODP Core number","cvDataType":"PALEOCEANOGRAPHY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":null,"cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":null,"cvWhat":"sampling metadata>notes"},{"cvAdditionalInfo":"IODP Section number","cvDataType":"PALEOCEANOGRAPHY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":null,"cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":null,"cvWhat":"sampling metadata>notes"},{"cvAdditionalInfo":"Depth of the top of sample interval in a section","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"},{"cvAdditionalInfo":"Depth of the bottom of sample interval in a section","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 end"},{"cvAdditionalInfo":"Depth of the top of sample interval on the CSF_A depth scale","cvDataType":"PALEOCEANOGRAPHY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":null,"cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"meter","cvWhat":"depth variable>depth>depth at sample start"},{"cvAdditionalInfo":"Depth of the bottom of sample interval on the CSF_A depth scale","cvDataType":"PALEOCEANOGRAPHY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":null,"cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"meter","cvWhat":"depth variable>depth>depth at sample end"},{"cvAdditionalInfo":"Depth of the top of sample interval on the CCSF_A depth scale","cvDataType":"PALEOCEANOGRAPHY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":null,"cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"meter","cvWhat":"depth variable>depth>depth at sample start"},{"cvAdditionalInfo":"Depth of the bottom of sample interval on the CCSF_A depth scale","cvDataType":"PALEOCEANOGRAPHY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":null,"cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"meter","cvWhat":"depth variable>depth>depth at sample end"},{"cvAdditionalInfo":"Depth of the top of sample interval on the CCSF_B depth scale","cvDataType":"PALEOCEANOGRAPHY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":null,"cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"meter","cvWhat":"depth variable>depth>depth at sample start"},{"cvAdditionalInfo":"Depth of the bottom of sample interval on the CCSF_B depth scale","cvDataType":"PALEOCEANOGRAPHY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":null,"cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"meter","cvWhat":"depth variable>depth>depth at sample end"},{"cvAdditionalInfo":"Depth of the mid point of sample interval on the CCSF_B depth scale","cvDataType":"PALEOCEANOGRAPHY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":null,"cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"meter","cvWhat":"depth variable>depth"},{"cvAdditionalInfo":"also 16% quantile age; Bchron bayesian age model","cvDataType":"PALEOCEANOGRAPHY","cvDetail":null,"cvError":"68% confidence interval lower bound","cvFormat":"Numeric","cvMaterial":null,"cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"calendar year before present","cvWhat":"age variable>age"},{"cvAdditionalInfo":"median age; Bchron bayesian age model","cvDataType":"PALEOCEANOGRAPHY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":null,"cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"calendar year before present","cvWhat":"age variable>age"},{"cvAdditionalInfo":"also 84% quantile age; Bchron bayesian age model","cvDataType":"PALEOCEANOGRAPHY","cvDetail":null,"cvError":"68% confidence interval upper bound","cvFormat":"Numeric","cvMaterial":null,"cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"calendar year before present","cvWhat":"age variable>age"},{"cvAdditionalInfo":"authigenic Fe-Mn oxyhydroxide","cvDataType":"PALEOCEANOGRAPHY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":"geological material>identified mineral>oxide and hydroxide minerals","cvMethod":"multiple collector inductively-coupled plasma mass spectrometry","cvSeasonality":null,"cvShortName":null,"cvUnit":"dimensionless","cvWhat":"chemical composition>isotope>isotope ratio>143Nd/144Nd"},{"cvAdditionalInfo":"authigenic Fe-Mn oxyhydroxide","cvDataType":"PALEOCEANOGRAPHY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":"geological material>identified mineral>oxide and hydroxide minerals","cvMethod":"multiple collector inductively-coupled plasma mass spectrometry","cvSeasonality":null,"cvShortName":null,"cvUnit":"epsilon unit","cvWhat":"chemical composition>isotope>isotope ratio>143Nd/144Nd>epsilon neodymium"},{"cvAdditionalInfo":"authigenic Fe-Mn oxyhydroxide; long term external reproducibility","cvDataType":"PALEOCEANOGRAPHY","cvDetail":null,"cvError":"two standard deviations","cvFormat":"Numeric","cvMaterial":"geological material>identified mineral>oxide and hydroxide minerals","cvMethod":"multiple collector inductively-coupled plasma mass spectrometry","cvSeasonality":null,"cvShortName":null,"cvUnit":"epsilon unit","cvWhat":"chemical composition>isotope>isotope ratio>143Nd/144Nd>epsilon neodymium"},{"cvAdditionalInfo":null,"cvDataType":"PALEOCEANOGRAPHY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":"geological material>bulk geological material>sediment","cvMethod":"multiple collector inductively-coupled plasma mass spectrometry","cvSeasonality":null,"cvShortName":null,"cvUnit":"dimensionless","cvWhat":"chemical composition>isotope>isotope ratio>143Nd/144Nd"},{"cvAdditionalInfo":null,"cvDataType":"PALEOCEANOGRAPHY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":"geological material>bulk geological material>sediment","cvMethod":"multiple collector inductively-coupled plasma mass spectrometry","cvSeasonality":null,"cvShortName":null,"cvUnit":"epsilon unit","cvWhat":"chemical composition>isotope>isotope ratio>143Nd/144Nd>epsilon neodymium"},{"cvAdditionalInfo":"long term external reproducibility","cvDataType":"PALEOCEANOGRAPHY","cvDetail":null,"cvError":"two standard deviations","cvFormat":"Numeric","cvMaterial":"geological material>bulk geological material>sediment","cvMethod":"multiple collector inductively-coupled plasma mass spectrometry","cvSeasonality":null,"cvShortName":null,"cvUnit":"epsilon unit","cvWhat":"chemical composition>isotope>isotope ratio>143Nd/144Nd>epsilon neodymium"}]}],"dataTableName":"IODP-U1419-eNd Du2018","dataTableNotes":"This site is co-located with EW0408-85TC/JC","earliestYear":22165,"earliestYearBP":22165,"earliestYearCE":-20215,"mostRecentYear":16511,"mostRecentYearBP":16511,"mostRecentYearCE":-14561,"species":[],"timeUnit":"cal yr BP"}],"siteName":"IODP U1419"}],"studyCode":null,"studyName":"Gulf of Alaska authigenic and bulk sediment neodymium isotope compositions for the past 22,000 years","studyNotes":"Authigenic neodymium isotope records were generated by leaching non-decarbonated bulk sediments. These records were used to reconstruct North Pacific circulation in the last 22,000 years. Bulk sediment neodymium isotopes were measured by complete microwave digestion of bulk sediments.\r\n        Provided Keywords: neodymium isotopes, Gulf of Alaska, North Pacific, Deglaciation, Ocean Circulation","version":"1.0","xmlId":"22714"}