noaa-ocean-20406 South Atlantic Stable Isotope and Geochemistry Data with Bottom Water Temperature Reconstruction across the Eocene-Oligocene Transition Pusz, A.E.; Thunell, R.C.; Miller, K.G. South Atlantic Stable Isotope and Geochemistry Data with Bottom Water Temperature Reconstruction across the Eocene-Oligocene Transition 2016-08-05 NCDC-Paleoclimatology ONLINE Files Pending https://www.ncdc.noaa.gov/paleo/study/20406 Investigator A.E. Pusz Investigator R.C. Thunell Investigator K.G. Miller earth science paleoclimate climate reconstructions|paleoceanography sea water temperature,magnesium/calcium,null,degree Celsius,null,climate reconstructions|paleoceanography,null,null,N,bottom water temperature using the method of Raitzsch 2008 earth science paleoclimate paleoceanography depth,null,null,meter,null,paleoceanography,null,null,N,meters below sea floor earth science paleoclimate paleoceanography magnesium/calcium,Cibicidoides sp.,null,millimole per mole,null,paleoceanography,null,inductively-coupled plasma atomic emission spectroscopy,N,Jobin Yvon Ultima Inductively Coupled Plasma Atomic Emission Spectrophotometer (ICP- AES) earth science paleoclimate paleoceanography sample identification,null,null,null,null,paleoceanography,null,null,C,IODP identification earth science paleoclimate paleoceanography notes,null,null,null,null,paleoceanography,null,null,C,null earth science paleoclimate paleoceanography age,null,null,million years ago,null,paleoceanography,null,null,N,using the Cande and Kent 1995 time scale earth science paleoclimate paleoceanography depth,null,null,meter,null,paleoceanography,null,null,N,meters composite depth earth science paleoclimate paleoceanography delta 18O,Cibicidoides sp.,null,per mil VPDB,null,paleoceanography,null,mass spectrometry,N,Micromass Optima mass spectrometer at Rutgers University earth science paleoclimate paleoceanography depth,null,null,meter,null,paleoceanography,composited,null,N,meters composite depth earth science paleoclimate climate reconstructions|paleoceanography sea water temperature,magnesium/calcium,null,degree Celsius,null,climate reconstructions|paleoceanography,null,null,N,bottom water temperature using the method of Raitzsch 2009 earth science paleoclimate paleoceanography age,null,null,million years ago,null,paleoceanography,null,null,N,null earth science paleoclimate paleoceanography age,null,null,million years ago,null,paleoceanography,null,null,N,Ages astronomically tuned earth science paleoclimate paleoceanography delta 13C,Cibicidoides sp.,null,per mil VPDB,null,paleoceanography,null,mass spectrometry,N,Micromass Optima mass spectrometer at Rutgers University earth science paleoclimate paleocean geochemistry earth science paleoclimate paleocean oxygen isotopes earth science paleoclimate paleocean carbon isotopes earth science paleoclimate paleocean reconstruction geoscientificInformation 36058360 cal yr BP 32848700 cal yr BP Complete -42.913687 -28.835017 2.639333 8.899737 -3702 -3059 Ocean Atlantic Ocean South Atlantic Ocean ODP 1090B>LATITUDE -42.913687>LONGITUDE 8.899737 Ocean Atlantic Ocean South Atlantic Ocean ODP 1265>LATITUDE -28.835017>LONGITUDE 2.639333 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 Pusz, A.E., R.C. Thunell, and K.G. Miller 2011 Paleoceanography 26 PA2205 10.1029/2010PA001950

Paired benthic foraminiferal stable isotope and Mg/Ca data are used to estimate bottom water temperature (BWT) and ice volume changes associated with the Eocene-Oligocene Transition (EOT), the largest global climate event of the past 50 Myr. We utilized ODP Sites 1090 and 1265 in the South Atlantic to assess seawater d18O (dw), Antarctic ice volume, and sea level changes across the EOT (~33.8–33.54 Ma). We also use benthic d13C data to reconstruct the sources of the deep water masses in this region during the EOT. Our data, together with previously published records, indicate that a pulse of Northern Component Water influenced the South Atlantic immediately prior to and following the EOT. Benthic d18O records show a 0.5‰ increase at ~33.8 Ma (EOT-1) that represents a ~2°C cooling and a small (~10 m) eustatic fall that is followed by a 1.0‰ increase associated with Oi-1. The expected cooling of deep waters at Oi-1 (~33.54 Ma) is not apparent in our Mg/Ca records. We suggest the cooling is masked by coeval changes in the carbonate saturation state (?[CO32-]) which affect the Mg/Ca data. To account for this, the BWT, ice volume, and dw estimates are corrected for a change in the ?[CO32-] of deep waters on the basis of recently published work. Corrected BWT at Sites 1090 and 1265 show a ~1.5°C cooling coincident with Oi-1 and an average dw increase of ~0.75‰. The increase in ice volume during Oi-1 resulted in a ~70 m drop in global sea level and the development of an Antarctic ice sheet that was near modern size or slightly larger. STUDY NOTES: Data used in the graphs and diagrams used to make interpretations. Age in 1265 tuned to 1090 below 193.1 mcd. Provided Keywords: Mg/Ca isotopes, Eocene-Oligocene transition

GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/pusz2011/pusz2011-1265.txt Formatted Text File; ODP1265 Data GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/pusz2011/pusz2011-1090-iso.txt Formatted Text File; ODP1090B d18O and d13C Data GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/pusz2011/pusz2011-1090-chem.txt Formatted Text File; ODP1090B Mg/Ca Data and BWT Reconstruction USA/NOAA DIF Version 9.8.4 2019-04-22 2019-04-22