{"NOAAStudyId":"25670","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":"2018-11-22","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-25670.xml","doi":null,"earliestYearBP":29840,"earliestYearCE":-27890,"entryId":"noaa-ocean-25670","funding":[{"fundingAgency":"US National Science Foundation","fundingGrant":"0624954"}],"investigators":"Koutavas, A.; Sachs, J.P.","mostRecentYearBP":790,"mostRecentYearCE":1160,"onlineResourceLink":"https://www.ncdc.noaa.gov/paleo/study/25670","originalSource":null,"publication":[{"abstract":"The equatorial cold tongue (ECT) of the eastern Pacific is the most dynamic ocean region in the world's tropics and sets the tempo for global climate anomalies arising from El Niño–Southern Oscillation (ENSO) events. This region's deglaciation history and relationship with north and south polar climates remains poorly understood, impeding integration of tropical Pacific ocean-atmosphere dynamics and ENSO variability in our understanding of glacial cycles. Here we present alkenone reconstructions of sea surface temperature (SST) across the last glacial termination from five ECT cores east of the Galapagos Islands. A composite index of SST based on these demonstrates strong temporal affinity with the two-step deglaciation of the Northern Hemisphere, composed of two distinct warming steps at the beginning of the Bölling and the end of the Younger Dryas intervals. Within dating uncertainty, warming in the ECT began in phase with the Bölling excursion, was followed by a 2–3 ka plateau, and resumed with a second pulse at the end of the Younger Dryas. On the basis of our reconstructions, about two thirds of the warming materialized at or after the end of the Younger Dryas, implying a marked delay in the region's response to deglaciation. The results challenge the prevailing paradigm that ECT deglacial history conforms to an Antarctic timing, commonly attributed to advection from the Southern Ocean through an interior oceanic link, or to synchronous response of both regions to CO2 forcing. Our results emphasize instead the role of dynamical adjustments linked to Northern Hemisphere processes, most likely transmitted through the atmosphere.","author":{"name":"Koutavas, A., and J.P. Sachs"},"citation":"Koutavas, A., and J.P. Sachs. 2008. Northern timing of deglaciation in the eastern equatorial Pacific from alkenone paleothermometry. Paleoceanography, 23, PA4205. doi: 10.1029/2008PA001593","edition":null,"identifier":{"id":"10.1029/2008PA001593","type":"doi","url":"http://dx.doi.org/10.1029/2008PA001593"},"issue":null,"journal":"Paleoceanography","pages":null,"pubRank":"1","pubYear":2008,"reportNumber":"PA4205","title":"Northern timing of deglaciation in the eastern equatorial Pacific from alkenone paleothermometry","type":"publication","volume":"23"}],"reconstruction":"Y","scienceKeywords":["Sea Surface Temperature Reconstruction"],"site":[{"NOAASiteId":"17945","geo":{"geoType":"Feature","geometry":{"coordinates":["-.47","-82.07"],"type":"POINT"},"properties":{"easternmostLongitude":"-82.07","maxElevationMeters":"-1373","minElevationMeters":"-1373","northernmostLatitude":"-0.47","southernmostLatitude":"-0.47","westernmostLongitude":"-82.07"}},"locationName":"Ocean>Pacific Ocean>South Pacific Ocean","mappable":"Y","paleoData":[{"NOAADataTableId":"37533","coreLengthMeters":null,"dataFile":[{"NOAAKeywords":["earth 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Ocean","mappable":"N","paleoData":[{"NOAADataTableId":"37538","coreLengthMeters":null,"dataFile":[{"NOAAKeywords":["earth science>paleoclimate>paleocean>reconstruction"],"fileUrl":"https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/koutavas2008/koutavas2008-ect.txt","linkText":"Equatorial Cold Tongue SST Index Data","urlDescription":"NOAA Template File","variables":[]}],"dataTableName":"ECT SSTindex Koutavas2008","dataTableNotes":null,"earliestYear":29500,"earliestYearBP":29500,"earliestYearCE":-27550,"mostRecentYear":1500,"mostRecentYearBP":1500,"mostRecentYearCE":450,"species":[],"timeUnit":"cal yr BP"}],"siteName":"Equatorial Equatorial Pacific Cold Tongue Region"}],"studyCode":null,"studyName":"Alkenone SST reconstructions from the eastern tropical Pacific 0-30 ky BP","studyNotes":"Provided Keywords: Eastern Equatorial Pacific, alkenones","version":"1.0","xmlId":"63714"}