{"xmlId":"1719","NOAAStudyId":"2649","studyName":"Tropical Atlantic Alkenone SST Reconstruction for the last 29,000 years","doi":"https://doi.org/10.25921/hx44-j234","uuid":"985baa98-bd15-4835-8227-615f466d17ea","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":"Rühlemann, C.; Mulitza, S.; Müller, P.J.; Wefer, G.; Zahn, R.","investigatorDetails":[{"firstName":"Carsten","lastName":"Rühlemann","initials":"C.","orcId":null},{"firstName":"Stefan","lastName":"Mulitza","initials":"S.","orcId":"0000-0002-3842-1447"},{"firstName":"Peter","lastName":"Müller","initials":"P.J.","orcId":null},{"firstName":"Gerold","lastName":"Wefer","initials":"G.","orcId":"0000-0002-6803-2020"},{"firstName":"Rainer","lastName":"Zahn","initials":"R.","orcId":null}],"version":"1.0","funding":[],"studyNotes":"","onlineResourceLink":"https://www.ncei.noaa.gov/access/paleo-search/study/2649","difMetadataLink":"https://www.ncei.noaa.gov/pub/data/metadata/published/paleo/dif/xml/noaa-ocean-2649.xml","isoMetadataLink":"https://www.ncei.noaa.gov/pub/data/metadata/published/paleo/iso/xml/noaa-ocean-2649.xml","originalSource":null,"dataTypeInformation":"https://www.ncei.noaa.gov/products/paleoclimatology/paleoceanography","studyCode":null,"scienceKeywords":["Sea Surface Temperature Reconstruction"],"reconstruction":"Y","contributionDate":"2006-01-01","entryId":"noaa-ocean-2649","earliestYearBP":29358,"mostRecentYearBP":0,"earliestYearCE":-27408,"mostRecentYearCE":1950,"publication":[{"author":{"name":"Müller, P.J., G. Kirst, G. Ruhland, I. von Storch, and A. Rosell-Melé"},"pubYear":1998,"title":"Calibration of the alkenone paleotemperature index U37K' based on core-tops from the eastern South Atlantic and the global ocean (60°N-60°S)","journal":"Geochimica et Cosmochimica Acta","volume":"62","edition":null,"issue":"10","pages":"1757-1772","reportNumber":null,"citation":"Müller, P.J., G. Kirst, G. Ruhland, I. von Storch, and A. Rosell-Melé. 1998. Calibration of the alkenone paleotemperature index U37K' based on core-tops from the eastern South Atlantic and the global ocean (60°N-60°S). Geochimica et Cosmochimica Acta, 62(10), 1757-1772. doi: 10.1016/S0016-7037(98)00097-0","type":"publication","identifier":{"type":"doi","id":"10.1016/S0016-7037(98)00097-0","url":"http://dx.doi.org/10.1016/S0016-7037(98)00097-0"},"abstract":null,"pubRank":"2"},{"author":{"name":"Ruehlemann, C., S. Mulitza, P J. Mueller, G. Wefer, and R. Zahn"},"pubYear":1999,"title":"Warming of the tropical Atlantic Ocean and slowdown of thermohaline circulation during the last deglaciation","journal":"Nature","volume":"402","edition":null,"issue":null,"pages":"511-514","reportNumber":null,"citation":"Ruehlemann, C., S. Mulitza, P J. Mueller, G. Wefer, and R. Zahn. 1999. Warming of the tropical Atlantic Ocean and slowdown of thermohaline circulation during the last deglaciation. Nature, 402, 511-514. doi: 10.1038/990069","type":"publication","identifier":{"type":"doi","id":"10.1038/990069","url":"http://dx.doi.org/10.1038/990069"},"abstract":"Evidence for abrupt climate changes on millennial and shorter timescales is widespread in marine and terrestrial climate records. Rapid reorganization of ocean circulation is considered to exert some control over these changes, as are shifts in the concentrations of atmospheric greenhouse gases. The response of the climate system to these two influences is fundamentally different: slowing of thermohaline overturn in the North Atlantic Ocean is expected to decrease northward heat transport by the ocean and to induce warming of the tropical Atlantic, whereas atmospheric greenhouse forcing should cause roughly synchronous global temperature changes. So these two mechanisms of climate change should be distinguishable by the timing of surface-water temperature variations relative to changes in deep-water circulation. Here we present a high-temporal-resolution record of sea surface temperatures from the western tropical North Atlantic Ocean which spans the past 29,000 years, derived from measurements of temperature-sensitive alkenone unsaturation in sedimentary organic matter. We find significant warming is documented for Heinrich event H1 (16,900-15,400 calendar years BP) and the Younger Dryas event (12,900-11,600 cal. yr BP), which were periods of intense cooling in the northern North Atlantic. Temperature changes in the tropical and high-latitude North Atlantic are out of phase, suggesting that the thermohaline circulation was the important trigger for these rapid climate changes.","pubRank":"1"}],"site":[{"NOAASiteId":"19287","siteName":"M35003-4","siteCode":null,"mappable":"Y","locationName":"Ocean>Atlantic Ocean>North Atlantic Ocean","geo":{"geoType":"Feature","geometry":{"type":"POINT","coordinates":["12.08","-61.25"]},"properties":{"southernmostLatitude":"12.08","northernmostLatitude":"12.08","westernmostLongitude":"-61.25","easternmostLongitude":"-61.25","minElevationMeters":"-1299","maxElevationMeters":"-1299"}},"paleoData":[{"dataTableName":"M35003-4","NOAADataTableId":"4375","earliestYear":24540,"mostRecentYear":0,"timeUnit":"14C yr BP","earliestYearBP":29358,"mostRecentYearBP":0,"earliestYearCE":-27408,"mostRecentYearCE":1950,"coreLengthMeters":null,"dataTableNotes":null,"species":[],"dataFile":[{"fileUrl":"https://www.ncei.noaa.gov/pub/data/paleo/contributions_by_author/ruehlemann1999","urlDescription":"Original Data and Full Metadata","linkText":"ruehlemann1999","variables":[],"NOAAKeywords":["earth science>paleoclimate>paleocean>biomarkers","earth science>paleoclimate>paleocean>reconstruction","earth science>paleoclimate>paleocean>oxygen isotopes","earth science>paleoclimate>paleocean>age control"]},{"fileUrl":"https://www.ncei.noaa.gov/pub/data/paleo/paleocean/sediment_files/complete/m35003-4-tab.txt","urlDescription":"Alternate Format Data","linkText":"m35003-4-tab.txt","variables":[{"cvDataType":"CLIMATE RECONSTRUCTIONS|PALEOCEANOGRAPHY","cvWhat":"earth system variable>temperature variable>temperature>sea water temperature>sea surface temperature","cvMaterial":"reconstruction material>organic compound index>alkenone unsaturation index","cvError":null,"cvUnit":"temperature unit>degree Celsius","cvSeasonality":null,"cvDetail":null,"cvMethod":null,"cvAdditionalInfo":null,"cvFormat":"Numeric","cvShortName":null},{"cvDataType":"PALEOCEANOGRAPHY","cvWhat":"depth variable>depth","cvMaterial":null,"cvError":null,"cvUnit":"length unit>centimeter","cvSeasonality":null,"cvDetail":null,"cvMethod":null,"cvAdditionalInfo":null,"cvFormat":"Numeric","cvShortName":null},{"cvDataType":"PALEOCEANOGRAPHY","cvWhat":"age variable>age","cvMaterial":null,"cvError":null,"cvUnit":"time unit>age unit>radiocarbon year before present","cvSeasonality":null,"cvDetail":null,"cvMethod":null,"cvAdditionalInfo":null,"cvFormat":"Numeric","cvShortName":null},{"cvDataType":"PALEOCEANOGRAPHY","cvWhat":"chemical composition>compound>organic compound>organooxygen compound>carbonyl compound>ketone>alkenone>C37 alkenone>C37:2 alkenone","cvMaterial":null,"cvError":null,"cvUnit":"dimensionless","cvSeasonality":null,"cvDetail":null,"cvMethod":null,"cvAdditionalInfo":null,"cvFormat":"Numeric","cvShortName":null},{"cvDataType":"PALEOCEANOGRAPHY","cvWhat":"chemical composition>compound>organic compound>organooxygen compound>carbonyl compound>ketone>alkenone>C37 alkenone>C37:3 alkenone","cvMaterial":null,"cvError":null,"cvUnit":"dimensionless","cvSeasonality":null,"cvDetail":null,"cvMethod":null,"cvAdditionalInfo":null,"cvFormat":"Numeric","cvShortName":null},{"cvDataType":"PALEOCEANOGRAPHY","cvWhat":"chemical composition>isotope>isotope ratio>delta 18O","cvMaterial":"biological material>organism>foraminifer>planktic foraminifer>Globigerinoides sp.>Globigerinoides ruber>Globigerinoides ruber pink","cvError":null,"cvUnit":"concentration unit>parts per notation unit>parts per thousand>per mil>per mil PDB","cvSeasonality":null,"cvDetail":null,"cvMethod":null,"cvAdditionalInfo":null,"cvFormat":"Numeric","cvShortName":null},{"cvDataType":"PALEOCEANOGRAPHY","cvWhat":"chemical composition>compound>organic compound>organic compound index>alkenone unsaturation index>alkenone unsaturation index Uk37 prime","cvMaterial":null,"cvError":null,"cvUnit":"dimensionless","cvSeasonality":null,"cvDetail":null,"cvMethod":null,"cvAdditionalInfo":null,"cvFormat":"Numeric","cvShortName":null},{"cvDataType":"PALEOCEANOGRAPHY","cvWhat":"age variable>age","cvMaterial":null,"cvError":null,"cvUnit":"time unit>age unit>calendar year before present","cvSeasonality":null,"cvDetail":null,"cvMethod":null,"cvAdditionalInfo":null,"cvFormat":"Numeric","cvShortName":null}],"NOAAKeywords":["earth science>paleoclimate>paleocean>age control","earth science>paleoclimate>paleocean>reconstruction","earth science>paleoclimate>paleocean>biomarkers","earth science>paleoclimate>paleocean>oxygen 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}