{"NOAAStudyId":"22090","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":"2017-05-15","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-22090.xml","doi":null,"earliestYearBP":24960,"earliestYearCE":-23010,"entryId":"noaa-ocean-22090","funding":[{"fundingAgency":"US National Science Foundation","fundingGrant":"OCE-1404915"}],"investigators":"Lacerra, M.; Lund, D.C.; Yu, J.; Schmittner, A.","mostRecentYearBP":800,"mostRecentYearCE":1150,"onlineResourceLink":"https://www.ncdc.noaa.gov/paleo/study/22090","originalSource":null,"publication":[{"abstract":"Carbon isotope minima were a ubiquitous feature of the mid‐depth Atlantic during Heinrich Stadial 1 (HS1, 14.5-17.5 kyr BP) and the Younger Dryas (YD, 11.5-12.9 kyr BP), yet their cause remains unclear. Recent evidence indicates that North Atlantic processes triggered the d13C anomalies, with weakening of the Atlantic Meridional Overturning Circulation (AMOC) being the most likely driver. Model simulations suggest that slowing of the AMOC increases the residence time of mid‐depth waters in the Atlantic, resulting in the accumulation of respired carbon. Here we assess ECO2 variability in the South Atlantic using benthic foraminiferal B/Ca, a proxy for [CO32-]. Using replicated high‐resolution B/Ca records from ~2 km water depth on the Brazil Margin, we show that [CO32-] decreased during HS1 and the YD, synchronous with apparent weakening of the AMOC. The [CO32-] response is smaller than in the tropical North Atlantic during HS1, indicating there was a north-south gradient in the [CO32-] signal similar to that for d13C. The implied variability in ECO2 is consistent with model results, suggesting that carbon is temporarily sequestered in the mid‐depth Atlantic during millennial‐scale stadial events. Using a carbon isotope mass balance, we estimate that approximately 75% of the HS1 d13C signal at the Brazil Margin was driven by accumulation of remineralized carbon, highlighting the nonconservative behavior of d13C during the last deglaciation.","author":{"name":"Matthew Lacerra, David Lund, Jimin Yu, and Andreas Schmittner"},"citation":"Matthew Lacerra, David Lund, Jimin Yu, and Andreas Schmittner. 2017. Carbon storage in the mid-depth Atlantic during millennial-scale climate events. Paleoceanography, 32(8). doi: 10.1002/2016PA003081","edition":null,"identifier":{"id":"10.1002/2016PA003081","type":"doi","url":"http://dx.doi.org/10.1002/2016PA003081"},"issue":"8","journal":"Paleoceanography","pages":null,"pubRank":"1","pubYear":2017,"reportNumber":null,"title":"Carbon storage in the mid-depth Atlantic during millennial-scale climate events","type":"publication","volume":"32"}],"reconstruction":"N","scienceKeywords":["Meridional Overturning Circulation (MOC)"],"site":[{"NOAASiteId":"54831","geo":{"geoType":"Feature","geometry":{"coordinates":["-27.5667","-46.1833"],"type":"POINT"},"properties":{"easternmostLongitude":"-46.1833","maxElevationMeters":"-2082","minElevationMeters":"-2082","northernmostLatitude":"-27.5667","southernmostLatitude":"-27.5667","westernmostLongitude":"-46.1833"}},"locationName":"Ocean>Atlantic Ocean>South Atlantic Ocean","mappable":"Y","paleoData":[{"NOAADataTableId":"33226","coreLengthMeters":null,"dataFile":[{"NOAAKeywords":["earth 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sp.>Cibicidoides wuellerstorfi","cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"micromole per mole","cvWhat":"chemical composition>element or compound ratio>barium/calcium"}]}],"dataTableName":"Lacerra2017GGC33BCa","dataTableNotes":null,"earliestYear":20210,"earliestYearBP":20210,"earliestYearCE":-18260,"mostRecentYear":1810,"mostRecentYearBP":1810,"mostRecentYearCE":140,"species":[],"timeUnit":"cal yr BP"},{"NOAADataTableId":"33227","coreLengthMeters":null,"dataFile":[{"NOAAKeywords":["earth science>paleoclimate>paleocean>geochemistry"],"fileUrl":"https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/lacerra2017/lacerra2017ggc33carb.txt","linkText":"Core KNR159-5-33GGC Carbonate Data","urlDescription":"Formatted Text Data 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Ocean","mappable":"Y","paleoData":[{"NOAADataTableId":"33224","coreLengthMeters":null,"dataFile":[{"NOAAKeywords":["earth science>paleoclimate>paleocean>geochemistry"],"fileUrl":"https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/lacerra2017/lacerra2017ggc78bca.txt","linkText":"Core KNR159-5-78GGC B/Ca Data","urlDescription":"Formatted Text Data File","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 kiloyear before present","cvWhat":"age variable>age"},{"cvAdditionalInfo":"> 250 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File","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 kiloyear before present","cvWhat":"age variable>age"},{"cvAdditionalInfo":null,"cvDataType":"PALEOCEANOGRAPHY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":"geological material>bulk geological material>sediment","cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"percent","cvWhat":"geological material>identified mineral>carbonate>calcium carbonate"},{"cvAdditionalInfo":"3-point running 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