noaa-ocean-17875 Pliocene-Pleistocene Benthic Foraminiferal Stable Isotope Data from the Southeast Atlantic Bell, D.B.; Kroon, D.; Jung, S.J.A.; Hodell, D.A.; Lourens, L.J. Pliocene-Pleistocene Benthic Foraminiferal Stable Isotope Data from the Southeast Atlantic 2015-01-26 NCDC-Paleoclimatology ONLINE Files Pending https://www.ncdc.noaa.gov/paleo/study/17875 Investigator D.B. Bell Investigator D. Kroon Investigator S.J.A. Jung Investigator D.A. Hodell Investigator L.J. Lourens earth science paleoclimate paleoceanography depth,null,null,meter,null,paleoceanography,null,null,N,null earth science paleoclimate paleoceanography age,null,null,calendar kiloyear before present,null,paleoceanography,null,null,N,null earth science paleoclimate paleoceanography delta 18O,Cibicidoides wuellerstorfi,null,per mil VPDB,null,paleoceanography,corrected,null,N,corrected for disequilibrium with surrounding seawater by 0.64per mil earth science paleoclimate paleoceanography delta 13C,Cibicidoides wuellerstorfi,null,per mil VPDB,null,paleoceanography,null,null,N,null earth science paleoclimate paleocean oxygen isotopes earth science paleoclimate paleocean carbon isotopes geoscientificInformation 5302600 cal yr BP 0 cal yr BP Complete -28.53 -28.098 1.711 2.85 -4355 -2504 Ocean Atlantic Ocean South Atlantic Ocean ODP 1267>LATITUDE -28.098>LONGITUDE 1.711 Ocean Atlantic Ocean South Atlantic Ocean ODP1264>LATITUDE -28.53>LONGITUDE 2.85 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 Bell, D.B., S.J.A. Jung, D. Kroon, L.J. Lourens, and D.A. Hodell 2014 Geochemistry, Geophysics, Geosystems 15 3304-3321 10.1002/2014GC005297

We present new orbital-resolution Pliocene-Pleistocene benthic stable oxygen isotope (δ18Ob) records from Ocean Drilling Program Sites 1264 and 1267, from Walvis Ridge in the Southeast Atlantic. We compare long-term (>250 kyr) interbasin δ18Ob-gradients between Pacific and North Atlantic regional stacks, as well as intra and interbasin gradients from the perspective of Walvis Ridge. The δ18Ob values from Sites 1264 and 1267 are almost always higher than deep North Atlantic and Pacific sites, with large gradients (>0.5‰) emerging abruptly at ∼2.4 Ma and persisting until ∼1.3 Ma. From this, we infer the presence of a new water mass, which resulted from the influence of dense, 18O-enriched Nordic sea overflow waters via the abyssal East Atlantic. Meanwhile, long-term average δ18Ob values in the North Atlantic appear to have remained within 0–0.25‰ lower than in the Pacific. However, the magnitude of this difference is sensitive to the inclusion of records from the equatorial West Atlantic. These results, together with constraints based on temperature, salinity, and density, suggest an influence of the seawater δ18O (δ18OSW) versus salinity relationship of source waters on δ18Ob values within the Atlantic. In particular, the abrupt emergence at ∼2.4 Ma of higher δ18Ob values at Sites 1264 and 1267, relative to North Atlantic records, appears to require a low-latitude surface water δ18OSW signal. This implies a connection between northward heat transport and deep water export into the abyssal East Atlantic. Hence, our results have implications for the interpretation of δ18Ob records and highlight the potential for δ18Ob to constrain deep Atlantic water mass sources and pathways during the Plio-Pleistocene. STUDY NOTES: Plio-Pleistocene (0-3600 ka) benthic foraminiferal (Cibicidoides wuellerstorfi) stable oxygen (d18O) and carbon (d13C) isotope measurements. Generally, each measurement is based on between 1-3 C.wuellerstorfi individuals from the >200 um size fraction. Isotope measurements were performed at Vrije Universiteit, Amsterdam, using a Themo Finnigan Delta+ mass spectrometer equipped with a Finnigan GasBench 2 preparation device and at Edinburgh University, using a Thermo Electron Delta+ Advantage mass spectrometer was used with a Kiel carbonate III automated extraction line.

GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/bell2014/bell2014-1264.txt Formatted Text File; ODP1264 Isotope Data GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/bell2014/bell2014-1267.txt Formatted Text File; ODP1267 Isotope Data USA/NOAA DIF Version 9.8.4 2019-03-05 2019-03-05