{"NOAAStudyId":"26951","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":"2019-06-03","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-26951.xml","doi":null,"earliestYearBP":57620,"earliestYearCE":-55670,"entryId":"noaa-ocean-26951","funding":[],"investigators":"Umling, N.E.; Oppo, D.W.","mostRecentYearBP":1663,"mostRecentYearCE":287,"onlineResourceLink":"https://www.ncdc.noaa.gov/paleo/study/26951","originalSource":null,"publication":[{"abstract":"Atlantic Meridional Overturning Circulation (AMOC) disruption during the last deglaciation is hypothesized to have caused large subsurface ocean temperature anomalies, but records from key regions are not available to test this hypothesis, and other possible drivers of warming have not been fully considered. Here, we present the first reliable evidence for subsurface warming in the South Atlantic during Heinrich Stadial 1 (HS1), confirming the link between large-scale heat redistribution and AMOC. Warming extends across the Bølling-Allerød (BA) despite predicted cooling at this time, thus spanning intervals of both weak and strong AMOC indicating another forcing mechanism that may have been previously overlooked. Transient model simulations and quasi-conservative water-mass tracers suggest that reduced northward upper ocean heat transport was responsible for the early deglacial (HS1) accumulation of heat at our shallower (~1,100 m) site. In contrast, the results suggest that warming at our deeper site (~1,900 m) site was dominated by southward advection of North Atlantic mid-depth heat anomalies. During the BA, the demise of ice sheets resulted in oceanographic changes in the North Atlantic that reduced convective heat loss to the atmosphere, causing subsurface warming that overwhelmed the cooling expected from an AMOC reinvigoration. The data and simulations suggest that rising atmospheric CO2 did not contribute significantly to deglacial subsurface warming at our sites.","author":{"name":"Umling, N.E., D.W. Oppo, P. Chen, J. Yu, Z. Liu, M. Yan, G. Gebbie, D.C. Lund, K.R. Pietro, Z.D. Jin, K.-F. Huang, K.B. Costa, and F.A.L. Toledo"},"citation":"Umling, N.E., D.W. Oppo, P. Chen, J. Yu, Z. Liu, M. Yan, G. Gebbie, D.C. Lund, K.R. Pietro, Z.D. Jin, K.-F. Huang, K.B. Costa, and F.A.L. Toledo. 2019. Atlantic circulation and ice sheet influences on upper South Atlantic temperatures during the last deglaciation. Paleoceanography and Paleoclimatology, 34. doi: 10.1029/2019PA003558","edition":null,"identifier":{"id":"10.1029/2019PA003558","type":"doi","url":"http://dx.doi.org/10.1029/2019PA003558"},"issue":null,"journal":"Paleoceanography and Paleoclimatology","pages":null,"pubRank":"1","pubYear":2019,"reportNumber":null,"title":"Atlantic circulation and ice sheet influences on upper South Atlantic temperatures during the last deglaciation","type":"publication","volume":"34"}],"reconstruction":"Y","scienceKeywords":["Other Reconstruction"],"site":[{"NOAASiteId":"56453","geo":{"geoType":"Feature","geometry":{"coordinates":["-27.5167","-46.4667"],"type":"POINT"},"properties":{"easternmostLongitude":"-46.4667","maxElevationMeters":"-1268","minElevationMeters":"-1268","northernmostLatitude":"-27.5167","southernmostLatitude":"-27.5167","westernmostLongitude":"-46.4667"}},"locationName":"Ocean>Atlantic Ocean>South Atlantic 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