{"NOAAStudyId":"6422","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":"2006-07-01","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-6422.xml","doi":null,"earliestYearBP":36250,"earliestYearCE":-34300,"entryId":"noaa-ocean-6422","funding":[],"investigators":"Kienast, M.; Kienast, S.S.; Calvert, S.E.; Eglinton, T.I.; Mollenhauer, G.; François, R.; Mix, A.C.","mostRecentYearBP":1476,"mostRecentYearCE":474,"onlineResourceLink":"https://www.ncdc.noaa.gov/paleo/study/6422","originalSource":null,"publication":[{"abstract":"Surface ocean conditions in the equatorial Pacific Ocean could hold the clue to whether millennial-scale global climate change during glacial times was initiated through tropical oceanŋatmosphere feedbacks or by changes in the Atlantic thermohaline circulation. North Atlantic cold periods during Heinrich events and millennial-scale cold events (stadials) have been linked with climatic changes in the tropical Atlantic Ocean and South America, as well as the Indian and East Asian monsoon systems, but not with tropical Pacific sea surface temperatures. Here we present a high-resolution record of sea surface temperatures in the eastern tropical Pacific derived from alkenone unsaturation measurements. Our data show a temperature drop of ~1 °C, synchronous (within dating uncertainties) with the shutdown of the Atlantic meridional overturning circulation during Heinrich event 1, and a smaller temperature drop of ~0.5 °C synchronous with the smaller reduction in the overturning circulation during the Younger Dryas event. Both cold events coincide with maxima in surface ocean productivity as inferred from 230Th-normalized carbon burial fluxes, suggesting increased upwelling at the time. From the concurrence of equatorial Pacific cooling with the two North Atlantic cold periods during deglaciation, we conclude that these millennial-scale climate changes were probably driven by a reorganization of the oceans' thermohaline circulation, although possibly amplified by tropical oceanŋatmosphere interaction as suggested before.","author":null,"citation":"Kienast, M., S.S. Kienast, S.E. Calvert, T.I. Eglinton, G. Mollenhauer, R. Franįois, and A.C. Mix. 2006. Eastern Pacific cooling and Atlantic overturningcirculation during the last deglaciation. Nature, 443, 846 - 849.","edition":null,"identifier":null,"issue":null,"journal":"Nature","pages":null,"pubRank":"1","pubYear":2006,"reportNumber":null,"title":"Eastern Pacific cooling and Atlantic overturningcirculation during the last deglaciation","type":"publication","volume":null}],"reconstruction":"Y","scienceKeywords":["Sea Surface Temperature Reconstruction"],"site":[{"NOAASiteId":"20737","geo":{"geoType":"Feature","geometry":{"coordinates":[".021667","-86.463"],"type":"POINT"},"properties":{"easternmostLongitude":"-86.463","maxElevationMeters":"-2941","minElevationMeters":"-2941","northernmostLatitude":"0.021667","southernmostLatitude":"0.021667","westernmostLongitude":"-86.463"}},"locationName":"Ocean>Pacific Ocean>Eastern Pacific Ocean","mappable":"Y","paleoData":[{"NOAADataTableId":"9611","coreLengthMeters":null,"dataFile":[{"NOAAKeywords":["earth science>paleoclimate>paleocean>age control","earth science>paleoclimate>paleocean>biomarkers","earth science>paleoclimate>paleocean>lithology","earth science>paleoclimate>paleocean>reconstruction"],"fileUrl":"https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/kienast2006b","linkText":"kienast2006b","urlDescription":"Original Data and Full Metadata","variables":[]},{"NOAAKeywords":["earth science>paleoclimate>paleocean>age control","earth science>paleoclimate>paleocean>lithology","earth science>paleoclimate>paleocean>biomarkers","earth science>paleoclimate>paleocean>reconstruction"],"fileUrl":"https://www1.ncdc.noaa.gov/pub/data/paleo/paleocean/sediment_files/complete/me5a24jc-tab.txt","linkText":"me5a24jc-tab.txt","urlDescription":"Alternate Format Data","variables":[{"cvAdditionalInfo":null,"cvDataType":"CLIMATE RECONSTRUCTIONS|PALEOCEANOGRAPHY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":"reconstruction material>organic compound index>alkenone unsaturation index","cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"degree Celsius","cvWhat":"earth system variable>temperature variable>temperature>sea water temperature>sea surface temperature"},{"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":null,"cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"calendar year before present","cvWhat":"age variable>age"},{"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>element or single-element molecule>carbon>organic carbon"},{"cvAdditionalInfo":"230Th-normalized burial flux","cvDataType":"PALEOCEANOGRAPHY","cvDetail":"normalized","cvError":null,"cvFormat":"Numeric","cvMaterial":"geological material>bulk geological material>sediment","cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"gram per square meter per kiloyear","cvWhat":"chemical composition>element or single-element molecule>carbon>organic carbon"},{"cvAdditionalInfo":null,"cvDataType":"PALEOCEANOGRAPHY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":null,"cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"dimensionless","cvWhat":"chemical composition>compound>organic compound>organic compound index>alkenone unsaturation index>alkenone unsaturation index Uk37 prime"}]}],"dataTableName":"ME0005A-24JC","dataTableNotes":"Alkenone SST reconstructed using Prahl 1988 equation.","earliestYear":36250,"earliestYearBP":36250,"earliestYearCE":-34300,"mostRecentYear":1476,"mostRecentYearBP":1476,"mostRecentYearCE":474,"species":[],"timeUnit":"cal yr BP"}],"siteName":"ME0005A-24JC"}],"studyCode":null,"studyName":"Eastern Tropical Pacific ME0005A-24JC Deglacial Alkenone SST Data","studyNotes":null,"version":"1.0","xmlId":"2433"}