{"NOAAStudyId":"11196","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":"2011-05-18","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-11196.xml","doi":null,"earliestYearBP":25120,"earliestYearCE":-23170,"entryId":"noaa-ocean-11196","funding":[{"fundingAgency":"US National Science Foundation","fundingGrant":null}],"investigators":"Carlson, A.E.; Oppo, D.W.; Came, R.E.; LeGrande, A.N.; Keigwin, L.D.; Curry, W.B.","mostRecentYearBP":370,"mostRecentYearCE":1580,"onlineResourceLink":"https://www.ncdc.noaa.gov/paleo/study/11196","originalSource":null,"publication":[{"abstract":"During the last deglaciation (ca. 21-10 ka), freshening of the \nNorth Atlantic surface likely caused reductions in Atlantic \nmeridional overturning circulation (AMOC); the mechanisms related \nto AMOC recovery remain poorly understood. Here we present three \nnew deglacial surface temperature and d18Oseawater (d18Osw) \nreconstructions from the western subtropical North and South \nAtlantic. Similarities to tropical Caribbean and western Atlantic \nd18Osw records suggest that a salty surface water mass accumulated \nin the western Atlantic from 27°S to 33°N during periods of \nreduced AMOC. However, d18Osw decreases led deep AMOC resumption \nby hundreds of years. We suggest that the northward export of salt \npreviously trapped in the western Atlantic resulted in the early \nestablishment of a shallow overturning circulation that eventually \nculminated in deep AMOC resumption, implying that AMOC may \nconstitute a self-limiting system. ","author":null,"citation":"Carlson, A.E., D.W. Oppo, R.E. Came,  A.N. LeGrande, L.D. Keigwin, \nand W.B. Curry. 2008. \nSubtropical Atlantic salinity variability and Atlantic meridional \ncirculation during the last deglaciation. \nGeology, Vol. 36, pp. 991-994. ","edition":null,"identifier":{"id":"10.1130/G25080A.1","type":"doi","url":"http://dx.doi.org/10.1130/G25080A.1"},"issue":null,"journal":"Geology","pages":null,"pubRank":"1","pubYear":2008,"reportNumber":null,"title":"Subtropical Atlantic salinity variability and Atlantic meridional  circulation during the last deglaciation","type":"publication","volume":null}],"reconstruction":"Y","scienceKeywords":["Meridional Overturning Circulation (MOC)","Sea Surface Temperature Reconstruction"],"site":[{"NOAASiteId":"19208","geo":{"geoType":"Feature","geometry":{"coordinates":["-27.52","-46.47"],"type":"POINT"},"properties":{"easternmostLongitude":"-46.47","maxElevationMeters":"-1268","minElevationMeters":"-1268","northernmostLatitude":"-27.52","southernmostLatitude":"-27.52","westernmostLongitude":"-46.47"}},"locationName":"Ocean>Atlantic Ocean>South Atlantic Ocean","mappable":"Y","paleoData":[{"NOAADataTableId":"19795","coreLengthMeters":null,"dataFile":[{"NOAAKeywords":["earth 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ratio>magnesium/calcium"}]},{"NOAAKeywords":["earth science>paleoclimate>paleocean>oxygen isotopes","earth science>paleoclimate>paleocean>reconstruction","earth science>paleoclimate>paleocean>geochemistry"],"fileUrl":"https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/carlson2008/carlson2008.xls","linkText":"carlson2008.xls","urlDescription":"Original Data and Full Metadata","variables":[]}],"dataTableName":"KNR159-5-36GGC","dataTableNotes":null,"earliestYear":22840,"earliestYearBP":22840,"earliestYearCE":-20890,"mostRecentYear":1110,"mostRecentYearBP":1110,"mostRecentYearCE":840,"species":[],"timeUnit":"cal yr BP"}],"siteName":"KNR159-36"},{"NOAASiteId":"20691","geo":{"geoType":"Feature","geometry":{"coordinates":["33.7","-57.58"],"type":"POINT"},"properties":{"easternmostLongitude":"-57.58","maxElevationMeters":"-4550","minElevationMeters":"-4550","northernmostLatitude":"33.7","southernmostLatitude":"33.7","westernmostLongitude":"-57.58"}},"locationName":"Ocean>Atlantic Ocean>North Atlantic Ocean","mappable":"Y","paleoData":[{"NOAADataTableId":"19796","coreLengthMeters":null,"dataFile":[{"NOAAKeywords":["earth science>paleoclimate>paleocean>oxygen isotopes","earth science>paleoclimate>paleocean>geochemistry","earth science>paleoclimate>paleocean>reconstruction"],"fileUrl":"https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/carlson2008/carlson2008.txt","linkText":"carlson2008.txt","urlDescription":"Original Data and Full Metadata","variables":[{"cvAdditionalInfo":"G. ruber white","cvDataType":"CLIMATE 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ratio>magnesium/calcium"},{"cvAdditionalInfo":null,"cvDataType":"PALEOCEANOGRAPHY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":"geological material>identified mineral>carbonate>calcium carbonate>calcite","cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"per mil","cvWhat":"chemical composition>isotope>isotope ratio>delta 18O"},{"cvAdditionalInfo":null,"cvDataType":"PALEOCEANOGRAPHY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":"biological material>organism>foraminifer>planktic foraminifer>Globorotalia sp.>Globorotalia inflata","cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"millimole per mole","cvWhat":"chemical composition>element or compound ratio>magnesium/calcium"}]},{"NOAAKeywords":["earth science>paleoclimate>paleocean>geochemistry","earth science>paleoclimate>paleocean>oxygen isotopes","earth 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Ridge, and KNR159–5–36GGC along the Brazilian margin.  \nFor the Blake Outer Ridge and the Brazilian margin cores, d18Ocalcite \nand Mg/Ca of the planktonic foraminifera Globigerinoides ruber (white) \nwere measured. Mg/Ca was converted to calcification temperature (CT) \nfor these two cores using a species-specific (G. ruber) core top \ncalibration for the Atlantic basin (Dekens et al., 2002): \nMg/Ca (mmol/mol) = 0.38*exp(0.09*CT) \n\nFor Bermuda Rise core GGC5, d18Ocalcite and Mg/Ca of the planktonic \nforaminifera Globorotalia inflata were measured.  A new Mg/Ca-CT \ncalibration, following Anand et al. (2003) and Dekens et al. (2002), \nwas developed for this core:\nMg/Ca (mmol/mol) = 0.299*exp[0.09*(CT-0.61*D)]\nwhere D is the core water depth in km. \n","version":"1.0","xmlId":"9634"}