noaa-ocean-20248 Bermuda Rise High Resolution 60-25KYrBP Uranium Series Data Henry, L.G.; McManus, J.F.; Curry, W.B.; Roberts, N.; Piotrowski, A.; Keigwin, L.D. Bermuda Rise High Resolution 60-25KYrBP Uranium Series Data 2016-08-16 NCDC-Paleoclimatology ONLINE Files Pending https://www.ncdc.noaa.gov/paleo/study/20248 Investigator L.G. Henry Investigator J.F. McManus Investigator W.B. Curry Investigator N. Roberts Investigator A. Piotrowski Investigator L.D. Keigwin earth science paleoclimate paleoceanography calcium,sediment,null,count per second,null,paleoceanography,null,energy-dispersive x-ray fluorescence spectroscopy,N,null earth science paleoclimate paleoceanography calcium carbonate,sediment,null,percent,null,paleoceanography,null,x-ray fluorescence spectroscopy,N,null earth science paleoclimate paleoceanography age,null,null,calendar kiloyear before present,null,paleoceanography,null,null,N,null earth science paleoclimate paleoceanography depth,null,null,meter,null,paleoceanography,null,null,N,null earth science paleoclimate paleoceanography titanium,sediment,null,count per second,null,paleoceanography,null,energy-dispersive x-ray fluorescence spectroscopy,N,null earth science paleoclimate paleoceanography titanium/calcium,sediment,null,dimensionless,null,paleoceanography,null,null,N,natural logorithm earth science paleoclimate paleoceanography delta 13C,Globigerinoides ruber,null,per mil,null,paleoceanography,null,null,N,null earth science paleoclimate paleoceanography delta 13C,Cibicidoides wuellerstorfi|Nuttallides umbonifera,null,per mil,null,paleoceanography,null,null,N,null earth science paleoclimate paleoceanography delta 18O,Cibicidoides wuellerstorfi|Nuttallides umbonifera,null,per mil,null,paleoceanography,null,null,N,null earth science paleoclimate paleoceanography 231Pa/230Th excess,sediment,two standard deviations,dimensionless,null,paleoceanography,null,isotope ratio mass spectrometry,N,null earth science paleoclimate climate reconstructions|paleoceanography sea surface temperature,alkenone unsaturation index,null,degree Celsius,null,climate reconstructions|paleoceanography,null,null,N,null earth science paleoclimate paleoceanography 231Pa/230Th excess,sediment,null,dimensionless,null,paleoceanography,null,isotope ratio mass spectrometry,N,null earth science paleoclimate paleoceanography age,null,null,calendar kiloyear before present,null,paleoceanography,null,null,N,NGRIP age earth science paleoclimate paleoceanography delta 18O,Globigerinoides ruber,null,per mil,null,paleoceanography,null,null,N,null earth science paleoclimate paleocean geochemistry geoscientificInformation Meridional Overturning Circulation (MOC) 163310 cal yr BP 570 cal yr BP Complete 33.69 33.69 -57.58 -57.58 -4541 -4541 Ocean Atlantic Ocean North Atlantic Ocean KNR191-CDH19>LATITUDE 33.69>LONGITUDE -57.58 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 L.G. Henry, J.F. McManus, W.B. Curry, N.L. Roberts, A.M. Piotrowski, L.D. Keigwin 2016 Science 353 6298 470-474 10.1126/science.aaf5529 http://science.sciencemag.org/content/353/6298/470

The most recent ice age was characterized by rapid and hemispherically asynchronous climate oscillations, whose origin remains unresolved. Variations in oceanic meridional heat transport may contribute to these repeated climate changes, which were most pronounced during marine isotope stage 3, the glacial interval 25 thousand to 60 thousand years ago. We examined climate and ocean circulation proxies throughout this interval at high resolution in a deep North Atlantic sediment core, combining the kinematic tracer protactinium/thorium (Pa/Th) with the deep water-mass tracer, epibenthic d13C. These indicators suggest reduced Atlantic overturning circulation during every cool northern stadial, with the greatest reductions during episodic Hudson Strait iceberg discharges, while sharp northern warming followed reinvigorated overturning. These results provide direct evidence for the ocean's persistent, central role in abrupt glacial climate change. STUDY NOTES: Pa/Th, carbonate, and stable isotope data collected from bulk sediment in Bermuda Rise sediment core KNR191 CDH19 covering 60-25 ka

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