{"NOAAStudyId":"9094","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":"2005-07-01","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-9094.xml","doi":null,"earliestYearBP":21285,"earliestYearCE":-19335,"entryId":"noaa-ocean-9094","funding":[],"investigators":"Gherardi, J.-M.; Labeyrie, L.D.; McManus, J.F.; Francois, R.","mostRecentYearBP":449,"mostRecentYearCE":1501,"onlineResourceLink":"https://www.ncdc.noaa.gov/paleo/study/9094","originalSource":null,"publication":[{"abstract":"A first study from the subtropical western Atlantic, using 231Pa/230Th ratios as a kinematic proxy for deep water circulation, provided compelling evidence for a strong link between climate and the rate of Meridional Overturning Circulation (MOC) over the last deglaciation. However, these results warrant confirmation from additional locations and water depths because the interpretation of the sedimentary 231Pa/230Th ratio in terms of circulation vigor can be biased by variations in particle flux and composition. We have measured 231Pa/230Th in a core from the Iberian margin, in the Northeastern Atlantic basin, and have compared these new results to the data from the western Atlantic basin. We find that the reduction in the circulation during H1 and YD and the subsequent increases first recognized in the sediment deposited on Bermuda Rise are also evident in the eastern basin, in a totally different sedimentary regime, confirming that sedimentary 231Pa/230Th ratios record basin-wide changes in deep water circulation. However, some differences between the eastern and western records are also recognized, providing preliminary evidence to differentiate between renewal rates in the two North Atlantic basins and between shallower and deeper overturning. Our results suggest the possible existence of two sources of Glacial North Atlantic Intermediate Deep Water (GNAIW), one in the south Labrador Sea and another west of Rockall Plateau. Both sources contributed to the meridional overturning but the two had different sensitivity to meltwater from the Laurentide and the Fennoscandian ice sheets during the deglaciation. These results indicate that additional information on the geometry and strength of the ventilation of the deep Atlantic can be obtained by contrasting the evolution of sediment 231Pa/230Th in different sections of the Atlantic Ocean.","author":null,"citation":"Gherardi, J.-M., L. Labeyrie, J.F. McManus, R. Francois, L.C. Skinner, and E. Cortijo. 2005. Evidence from the Northeastern Atlantic basin for variability in the rate of the meridional overturning circulation through the last deglaciation. Earth and Planetary Science Letters, 240(3-4), 710-723.","edition":null,"identifier":null,"issue":null,"journal":"Earth and Planetary Science Letters","pages":null,"pubRank":"1","pubYear":2005,"reportNumber":null,"title":"Evidence from the Northeastern Atlantic basin for variability in the rate of the meridional overturning circulation through the last deglaciation","type":"publication","volume":null}],"reconstruction":"N","scienceKeywords":null,"site":[{"NOAASiteId":"17898","geo":{"geoType":"Feature","geometry":{"coordinates":["37.77","-10.18"],"type":"POINT"},"properties":{"easternmostLongitude":"-10.18","maxElevationMeters":"-3135","minElevationMeters":"-3135","northernmostLatitude":"37.77","southernmostLatitude":"37.77","westernmostLongitude":"-10.18"}},"locationName":"Ocean>Atlantic Ocean>North Atlantic Ocean","mappable":"Y","paleoData":[{"NOAADataTableId":"12385","coreLengthMeters":null,"dataFile":[{"NOAAKeywords":["earth science>paleoclimate>paleocean>age control","earth 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isotope"],"fileUrl":"https://www1.ncdc.noaa.gov/pub/data/paleo/syntrace/t21data/s81-18-g-sytr-tab.txt","linkText":"s81-18-g-sytr-tab.txt","urlDescription":"Syntrace","variables":[{"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":"two standard deviations","cvFormat":"Numeric","cvMaterial":"geological material>bulk geological material>sediment","cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"dimensionless","cvWhat":"chemical composition>isotope>isotope 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The added points were: 0 cm - 0 Cal yrs BP, 170cm - 11830 Cal yrs BP, 200cm - 12800 Cal Yrs BP.","earliestYear":17991,"earliestYearBP":21285,"earliestYearCE":-19335,"mostRecentYear":430,"mostRecentYearBP":449,"mostRecentYearCE":1501,"species":[],"timeUnit":"14C yr BP"}],"siteName":"SU81-18"}],"studyCode":null,"studyName":"Northeast Atlantic SU81-18 Deglacial 231Pa/230Th Data","studyNotes":null,"version":"1.0","xmlId":"2901"}