noaa-ocean-26951 South Atlantic Bottom Water Temperature, d18O, d13C and Trace Metal Data during the Last Deglaciation Umling, N.E.; Oppo, D.W. South Atlantic Bottom Water Temperature, d18O, d13C and Trace Metal Data during the Last Deglaciation 2019-06-03 NCDC-Paleoclimatology ONLINE Files Pending https://www.ncdc.noaa.gov/paleo/study/26951 Investigator N.E. Umling Investigator D.W. Oppo earth science paleoclimate paleocean trace metals in carbonates earth science paleoclimate paleocean oxygen isotopes earth science paleoclimate paleocean carbon isotopes earth science paleoclimate paleocean reconstruction geoscientificInformation Other Reconstruction 57620 cal yr BP 1663 cal yr BP Complete -31.516667 43.366667 -87.75 -28.233333 -1890 -1105 Ocean Atlantic Ocean South Atlantic Ocean PC-CAM61>LATITUDE -22.52>LONGITUDE -39.9 Ocean Atlantic Ocean South Atlantic Ocean KNR159-5-105JPC>LATITUDE -27.35>LONGITUDE -46.63 Ocean Atlantic Ocean South Atlantic Ocean KNR159-5-36GGC>LATITUDE -27.5167>LONGITUDE -46.4667 Ocean Atlantic Ocean South Atlantic Ocean KNR159-5-90GGC>LATITUDE -27.35>LONGITUDE -46.63 Ocean Atlantic, Eastern Tropical Pacific Coretop Set>LATITUDE >LONGITUDE None 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. English DOC/NOAA/NESDIS/NCEI National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce https://www.ncdc.noaa.gov/data-access/paleoclimatology-data DATA Center Contact Bruce Bauer bruce.a.bauer@noaa.gov paleo@noaa.gov 303-497-6280 303-497-6513

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Boulder CO 80305-3328 USA online ASCII 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 Paleoceanography and Paleoclimatology 34 10.1029/2019PA003558

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. STUDY NOTES: Values that deviated from the mean by greater than 2s, or were an outlier of 3+ replicates were not included in the final trends.

GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/umling2019/umling2019-pc-cam61-benth.txt NOAA Template File; PC-CAM61 Benthic d18O and d13C Data GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/umling2019/umling2019-36ggc-benth.txt NOAA Template File; KNR159-5-36GGC Benthic d18O and d13C Data GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/umling2019/umling2019-36ggc-uvi.txt NOAA Template File; KNR159-5-36GGC Uvigerina Data GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/umling2019/umling2019-90ggc-he.txt NOAA Template File; KNR159-5-90GGC H.elegans Data GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/umling2019/umling2019-pc-cam61-wuell.txt NOAA Template File; PC-CAM61 C.wuellerstorfi Data GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/umling2019/umling2019-36ggc-he.txt NOAA Template File; KNR159-5-36GGC H.elegans Data GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/umling2019/umling2019-coretop.txt NOAA Template File; Coretop Trace Metal Data GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/umling2019/umling2019-36ggc-pachy.txt NOAA Template File; KNR159-5-36GGC C.Pachyderma Data GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/umling2019/umling2019-105jpc-benth.txt NOAA Template File; KNR159-5-105JPC Benthic d18O and d13C Data GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/umling2019/umling2019-pc-cam61-he.txt NOAA Template File; PC-CAM61 H.elegans Data GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/umling2019/umling2019-90ggc-benth.txt NOAA Template File; KNR159-5-90GGC Benthic d18O and d13C Data GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/umling2019/umling2019-105jpc-he.txt NOAA Template File; KNR159-5-105JPC H.elegans Data USA/NOAA DIF Version 9.8.4 2019-06-07 2019-06-07