{"NOAAStudyId":"26330","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":"2019-03-04","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-26330.xml","doi":null,"earliestYearBP":11190,"earliestYearCE":-9240,"entryId":"noaa-ocean-26330","funding":[{"fundingAgency":"US National Science Foundation","fundingGrant":"AGS 16-35019"},{"fundingAgency":"University of North Carolina-Wilmington","fundingGrant":"Charles Cahill Award"},{"fundingAgency":"Columbia University","fundingGrant":"Columbia Science Fellows Program"}],"investigators":"Hoffmann, S.S.; McManus, J.F.; Swank, E.","mostRecentYearBP":90,"mostRecentYearCE":1860,"onlineResourceLink":"https://www.ncdc.noaa.gov/paleo/study/26330","originalSource":null,"publication":[{"abstract":"While substantial changes in thermohaline circulation related to deglacial climate variability are well established, the role of this circulation in Holocene climate variability remains uncertain. Here we use two dynamical proxies, 231Pa/230Th ratios and mean sortable silt size (SS), to reconstruct Holocene bottom water circulation at the intermediate-depth Carolina Slope. We find no substantial change in deep current speed or 231Pa export at this site during the Holocene, suggesting consistent 231Pa export via the Deep Western Boundary Current. SS shows increasing millennial-scale variability in the middle-late Holocene, which may reflect Labrador Sea Water contribution to current speed. We conclude that deepwater export from the North Atlantic has remained remarkably stable during the Holocene, decoupled from changing rates of specific water masses, while production of these water masses varied at millennial to centennial time scales. The persistence of the large-scale overturning may reflect the ocean's stabilizing influence on Holocene climate.","author":{"name":"Hoffmann, S.S., J.F. McManus, and E. Swank"},"citation":"Hoffmann, S.S., J.F. McManus, and E. Swank. 2018. Evidence for stable Holocene basin-scale overturning circulation despite variable currents along the Deep Western Boundary Current of the North Atlantic Ocean. Geophysical Research Letters, 45(24), 13427-13436. doi: 10.1029/2018GL080187","edition":null,"identifier":{"id":"10.1029/2018GL080187","type":"doi","url":"http://dx.doi.org/10.1029/2018GL080187"},"issue":"24","journal":"Geophysical Research Letters","pages":"13427-13436","pubRank":"1","pubYear":2018,"reportNumber":null,"title":"Evidence for stable Holocene basin-scale overturning circulation despite variable currents along the Deep Western Boundary Current of the North Atlantic Ocean","type":"publication","volume":"45"}],"reconstruction":"N","scienceKeywords":null,"site":[{"NOAASiteId":"57842","geo":{"geoType":"Feature","geometry":{"coordinates":["32.78","-76.283"],"type":"POINT"},"properties":{"easternmostLongitude":"-76.283","maxElevationMeters":"-1790","minElevationMeters":"-1790","northernmostLatitude":"32.78","southernmostLatitude":"32.78","westernmostLongitude":"-76.283"}},"locationName":"Ocean>Atlantic Ocean>North Atlantic Ocean","mappable":"Y","paleoData":[{"NOAADataTableId":"38593","coreLengthMeters":4,"dataFile":[{"NOAAKeywords":["earth science>paleoclimate>paleocean>geochemistry","earth science>paleoclimate>paleocean>radiogenic isotope"],"fileUrl":"https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/hoffmann2018/hoffmann2018-radiogenic.txt","linkText":"51GGC Radiogenic Isotope Data","urlDescription":"NOAA Template File","variables":[]}],"dataTableName":"KN140-2-51GGC radiogenic Hoffmann2018","dataTableNotes":null,"earliestYear":11190,"earliestYearBP":11190,"earliestYearCE":-9240,"mostRecentYear":90,"mostRecentYearBP":90,"mostRecentYearCE":1860,"species":[],"timeUnit":"cal yr BP"},{"NOAADataTableId":"38594","coreLengthMeters":4,"dataFile":[{"NOAAKeywords":["earth science>paleoclimate>paleocean>physical properties"],"fileUrl":"https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/hoffmann2018/hoffmann2018-silt.txt","linkText":"51GGC Silt Data","urlDescription":"NOAA Template File","variables":[]}],"dataTableName":"KN140-2-51GGC silt Hoffmann2018","dataTableNotes":null,"earliestYear":11190,"earliestYearBP":11190,"earliestYearCE":-9240,"mostRecentYear":90,"mostRecentYearBP":90,"mostRecentYearCE":1860,"species":[],"timeUnit":"cal yr BP"}],"siteName":"KN140-2-51"}],"studyCode":null,"studyName":"Holocene sedimentary radiogenic nuclide and sortable silt records from the Carolina Slope","studyNotes":"Provided Keywords: Holocene, sediment geochemistry, sediment grain size","version":"1.0","xmlId":"65395"}