{"NOAAStudyId":"10356","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":"2011-01-07","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-10356.xml","doi":null,"earliestYearBP":85360,"earliestYearCE":-83410,"entryId":"noaa-ocean-10356","funding":[{"fundingAgency":"French Minister of Research","fundingGrant":null},{"fundingAgency":"EURODOC","fundingGrant":"SAFIR-980065327"},{"fundingAgency":"US National Science Foundation","fundingGrant":null},{"fundingAgency":"Mellon award","fundingGrant":null}],"investigators":"Pichat, S.; Sims, K.W.W.; François, R.; McManus, J.F.; Brown-Leger, S.; Albarède, F.","mostRecentYearBP":4350,"mostRecentYearCE":-2400,"onlineResourceLink":"https://www.ncdc.noaa.gov/paleo/study/10356","originalSource":null,"publication":[{"abstract":"The (231Pa/230Th)xs,0 records obtained from two cores from the \nwestern (MD97-2138; 1°25'S, 146°24'E, 1900 m) and eastern (Ocean \nDrilling Program Leg 138 Site 849, 0°11.59'N, 110°31.18'W, 3851 m) \nequatorial Pacific display similar variability over the last 85,000 \nyears, i.e., from isotopic stages 1 to 5a, with systematically \nhigher values during the Holocene, isotopic stage 3, and isotopic \nstage 5a, and lower values, approaching the production rate ratio \nof the two isotopes (0.093), during the colder periods corresponding \nto isotopic stages 2 and 4. We have also measured the 230Th-normalized \nbiogenic preserved and terrigenous fluxes, as well as major and trace \nelements concentrations, in both cores. The (231Pa/230Th)xs,0 results \ncombined with the changes in preserved carbonate and opal fluxes \nat the eastern site indicate lower productivity in the eastern \nequatorial Pacific during glacial periods. The (231Pa/230Th)xs,0 \nvariations in the western equatorial Pacific also seem to be \ncontrolled by productivity (carbonate and/or opal). The generally \nhigh (231Pa/230Th)xs,0 ratios (>0.093) of the profile could be due \nto opal and/or MnO2 in the sinking particles. The profiles of \n(231Pa/230Th)xs,0 and 230Th-normalized fluxes indicate a decrease \nin exported carbonate, and possibly opal, during isotopic stages 2 \nand 4 in MD97-2138. Using 230Th-normalized flux, we also show that \nsediments from the two cores were strongly affected by sediment \nredistribution by bottom currents suggesting a control of mass \naccumulation rates by sediment focusing variability. \n","author":null,"citation":"Pichat, S., K.W.W. Sims, R. François, J.F. McManus, S. Brown Leger, \nand F. Albarède. 2004. \nLower export production during glacial periods in the equatorial \nPacific derived from (231Pa/230Th)xs,0 measurements in deep-sea \nsediments. \nPaleoceanography, 19, PA4023, doi:10.1029/2003PA000994. \n","edition":null,"identifier":{"id":"10.1029/2003PA000994","type":"doi","url":"http://dx.doi.org/10.1029/2003PA000994"},"issue":null,"journal":"Paleoceanography","pages":null,"pubRank":"1","pubYear":2004,"reportNumber":null,"title":"Lower export production during glacial periods in the equatorial  Pacific derived from (231Pa/230Th)xs,0 measurements in deep-sea  sediments","type":"publication","volume":null}],"reconstruction":"N","scienceKeywords":null,"site":[{"NOAASiteId":"19108","geo":{"geoType":"Feature","geometry":{"coordinates":[".18","-110.52"],"type":"POINT"},"properties":{"easternmostLongitude":"-110.52","maxElevationMeters":"-3839","minElevationMeters":"-3839","northernmostLatitude":"0.18","southernmostLatitude":"0.18","westernmostLongitude":"-110.52"}},"locationName":"Ocean>Pacific Ocean>North Pacific Ocean","mappable":"Y","paleoData":[{"NOAADataTableId":"19128","coreLengthMeters":0,"dataFile":[{"NOAAKeywords":["earth science>paleoclimate>paleocean>radiogenic isotope","earth science>paleoclimate>paleocean>geochemistry"],"fileUrl":"https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/pichat2004/pichat2004.txt","linkText":"pichat2004.txt","urlDescription":"Original Data and Full Metadata","variables":[{"cvAdditionalInfo":null,"cvDataType":"PALEOCEANOGRAPHY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":null,"cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"calendar kiloyear before present","cvWhat":"age variable>age"},{"cvAdditionalInfo":null,"cvDataType":"PALEOCEANOGRAPHY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":null,"cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"centimeter","cvWhat":"depth variable>depth"},{"cvAdditionalInfo":null,"cvDataType":"PALEOCEANOGRAPHY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":"geological material>bulk geological material>sediment","cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"weight percent","cvWhat":"chemical composition>element or single-element molecule>aluminum"},{"cvAdditionalInfo":null,"cvDataType":"PALEOCEANOGRAPHY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":"geological material>bulk geological material>sediment","cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"weight percent","cvWhat":"chemical composition>element or single-element molecule>calcium"},{"cvAdditionalInfo":null,"cvDataType":"PALEOCEANOGRAPHY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":"geological material>bulk geological material>sediment","cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"weight percent","cvWhat":"chemical composition>element or single-element molecule>iron"},{"cvAdditionalInfo":null,"cvDataType":"PALEOCEANOGRAPHY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":"geological material>bulk geological material>sediment","cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"weight percent","cvWhat":"chemical composition>element or single-element molecule>manganese"},{"cvAdditionalInfo":null,"cvDataType":"PALEOCEANOGRAPHY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":"geological material>bulk geological material>sediment","cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"weight percent","cvWhat":"chemical composition>element or single-element molecule>silicon"},{"cvAdditionalInfo":null,"cvDataType":"PALEOCEANOGRAPHY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":"geological material>bulk geological material>sediment","cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"weight percent","cvWhat":"chemical composition>element or single-element molecule>titanium"},{"cvAdditionalInfo":null,"cvDataType":"PALEOCEANOGRAPHY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":"geological material>bulk geological material>sediment","cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"percent","cvWhat":"geological material>identified mineral>carbonate"},{"cvAdditionalInfo":"terrigenous sediment","cvDataType":"PALEOCEANOGRAPHY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":"geological material>bulk geological material>sediment","cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"percent","cvWhat":"geological material>bulk geological material>mineral matter"},{"cvAdditionalInfo":null,"cvDataType":"PALEOCEANOGRAPHY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":"geological material>bulk geological material>sediment","cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"percent","cvWhat":"chemical composition>compound>inorganic compound>manganese oxide"},{"cvAdditionalInfo":null,"cvDataType":"PALEOCEANOGRAPHY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":"geological material>bulk geological material>sediment","cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"percent","cvWhat":"chemical composition>compound>inorganic compound>silicon dioxide>biogenic silica"}]},{"NOAAKeywords":["earth science>paleoclimate>paleocean>geochemistry","earth science>paleoclimate>paleocean>radiogenic isotope"],"fileUrl":"https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/pichat2004/pichat2004.xls","linkText":"pichat2004.xls","urlDescription":"Original Data and Full Metadata","variables":[]}],"dataTableName":"ODP849P","dataTableNotes":null,"earliestYear":85360,"earliestYearBP":85360,"earliestYearCE":-83410,"mostRecentYear":4350,"mostRecentYearBP":4350,"mostRecentYearCE":-2400,"species":[],"timeUnit":"cal yr BP"}],"siteName":"ODP 849"}],"studyCode":null,"studyName":"Eastern Equatorial Pacific ODP849 85KYr Radionuclide and Major Element Data ","studyNotes":"230Th, 231Pa, 232Th, 238U activities, (231Pa/230Th)xs,0 ratio, \nopal, carbonate, MnO2 and major elements concentrations for ODP849. \nRadionuclide concentrations were obtained by isotope dilution \nSF-ICP-MS. Major elements concentrations were measured by ICP-AES. \nOpal, carbonate and MnO2 were determined by normative calculations. \nAge model is based on oxygen isotope stratigraphy on Cibicides \nwuellerstorfi (Mix et al., 1995). \n","version":"1.0","xmlId":"9012"}