noaa-ocean-15293 Western Atlantic Late Paleogene Foraminiferal Stable Isotope and Mg/Ca Data Katz, M.E.; Cramer, B.S. ; Toggweiler, J.R.; Esmay, G.; Liu, C.; Miller, K.G.; Rosenthal, Y.; Wade, B.S.; Wright, J.D. Western Atlantic Late Paleogene Foraminiferal Stable Isotope and Mg/Ca Data 2013-10-25 NCDC-Paleoclimatology ONLINE Files Pending https://www.ncdc.noaa.gov/paleo/study/15293 Investigator M.E. Katz Investigator B.S. Cramer Investigator J.R. Toggweiler Investigator G. Esmay Investigator C. Liu Investigator K.G. Miller Investigator Y. Rosenthal Investigator B.S. Wade Investigator J.D. Wright earth science paleoclimate paleoceanography delta 18O,benthic foraminifer,null,per mil PDB,null,paleoceanography,null,null,N,null earth science paleoclimate paleoceanography depth,null,null,meter,null,paleoceanography,composited,null,N,null earth science paleoclimate paleoceanography delta 13C,benthic foraminifer,null,per mil PDB,null,paleoceanography,normalized,null,N,adjusted to Cibicidoides sp. earth science paleoclimate paleoceanography age,null,null,calendar year before present,null,paleoceanography,null,null,N,null earth science paleoclimate paleoceanography delta 13C,benthic foraminifer,null,per mil PDB,null,paleoceanography,null,null,N,null earth science paleoclimate paleoceanography notes,null,null,null,null,paleoceanography,null,null,N,taxa analyzed earth science paleoclimate paleoceanography sample identification,null,null,null,null,paleoceanography,null,null,N,null earth science paleoclimate paleoceanography age,null,null,million years ago,null,paleoceanography,null,null,N,null earth science paleoclimate paleoceanography magnesium/calcium,benthic foraminifer,null,millimole per mole,null,paleoceanography,null,null,N,null earth science paleoclimate paleoceanography depth,null,null,meter,null,paleoceanography,null,null,N,mbsf earth science paleoclimate paleoceanography magnesium/calcium,benthic foraminifer,null,millimole per mole,null,paleoceanography,null,null,N,plotted earth science paleoclimate paleoceanography delta 18O,benthic foraminifer,null,per mil PDB,null,paleoceanography,normalized,null,N,adjusted to Cibicidoides sp. earth science paleoclimate paleocean geochemistry earth science paleoclimate paleocean oxygen isotopes earth science paleoclimate paleocean carbon isotopes geoscientificInformation Meridional Overturning Circulation (MOC) 38065000 cal yr BP 22795000 cal yr BP Complete 29.9923 33.1333 -77.25 -76.5236 Ocean Atlantic Ocean North Atlantic Ocean ASP-5>LATITUDE 33.1333>LONGITUDE -77.25 Ocean Atlantic Ocean North Atlantic Ocean ODP 1053>LATITUDE 29.9923>LONGITUDE -76.5236 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

325 Broadway, E/NE31

Boulder CO 80305-3328 USA online ASCII Miriam E. Katz, Benjamin S. Cramer, J.R. Toggweiler, Gar Esmay, Chengjie Liu, Kenneth G. Miller, Yair Rosenthal, Bridget S. Wade, and James D. Wright. 2011 Science 332 6033 1076-1079 10.1126/science.1202122

Global cooling and the development of continental-scale Antarctic glaciation occurred in the late middle Eocene to early Oligocene (~38 to 28 million years ago), accompanied by deep-ocean reorganization attributed to gradual Antarctic Circumpolar Current (ACC) development. Our benthic foraminiferal stable isotope comparisons show that a large d13C offset developed between mid-depth (~600 meters) and deep (>1000 meters) western North Atlantic waters in the early Oligocene, indicating the development of intermediate-depth d13C and O2 minima closely linked in the modern ocean to northward incursion of Antarctic Intermediate Water. At the same time, the ocean's coldest waters became restricted to south of the ACC, probably forming a bottom-ocean layer, as in the modern ocean. We show that the modern four-layer ocean structure (surface, intermediate, deep, and bottom waters) developed during the early Oligocene as a consequence of the ACC. STUDY NOTES: Benthic foraminifera stable isotope and Mg/Ca data from 2 western North Atlantic sediment cores from the late middle Eocene to early Oligocene (~38 to 28 million years ago)

GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/katz2011/katz2011asp5iso.txt GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/katz2011/katz2011asp5mg-ca.txt GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/katz2011/katz2011odp1053.txt USA/NOAA DIF Version 9.8.4 2018-12-11 2018-12-11