noaa-ocean-17375 Pacific Glacial Foraminiferal Radiocarbon and Stable Isotope Data Keigwin, L.D.; Lehman, S.J. Pacific Glacial Foraminiferal Radiocarbon and Stable Isotope Data 2014-10-27 NCDC-Paleoclimatology ONLINE Files Pending https://www.ncdc.noaa.gov/paleo/study/17375 Investigator L.D. Keigwin Investigator S.J. Lehman earth science paleoclimate paleoceanography delta 13C,Nuttallides umbonifera,null,per mil PDB,null,paleoceanography,averaged,null,N,Measurements on Finigan earth science paleoclimate paleoceanography number of samples,null,null,count,null,paleoceanography,null,null,N,null earth science paleoclimate paleoceanography delta 18O,Neogloboquadrina pachyderma sinistral,null,per mil PDB,null,paleoceanography,null,null,N,null earth science paleoclimate paleoceanography notes,null,null,null,null,paleoceanography,null,null,C,null earth science paleoclimate paleoceanography delta 13C,Cibicidoides wuellerstorfi,null,per mil PDB,null,paleoceanography,null,null,N,Measurements on VG Prism at NOSAMS earth science paleoclimate paleoceanography delta 18O,Cibicidoides wuellerstorfi,null,per mil PDB,null,paleoceanography,averaged,null,N,Measurements on VG Prism at NOSAMS earth science paleoclimate paleoceanography notes,null,null,null,null,paleoceanography,null,null,C,analysis date earth science paleoclimate paleoceanography delta 13C,Cibicidoides wuellerstorfi,null,per mil PDB,null,paleoceanography,averaged,null,N,Measurements on VG Prism at NOSAMS earth science paleoclimate paleoceanography delta 13C,Cibicides kullenbergi,null,per mil PDB,null,paleoceanography,null,null,N,Measurements on VG Prism at NOSAMS earth science paleoclimate paleoceanography delta 18O,Cibicides kullenbergi,null,per mil PDB,null,paleoceanography,null,null,N,Measurements on VG Prism at NOSAMS earth science paleoclimate paleoceanography delta 13C,Cibicidoides wuellerstorfi,null,per mil PDB,null,paleoceanography,null,null,N,Measurements on pristine individual C. wuellerstorfi on Finigan earth science paleoclimate paleoceanography delta 18O,Uvigerina sp.,null,per mil PDB,null,paleoceanography,null,null,N,null earth science paleoclimate paleoceanography delta 13C,Uvigerina sp.,null,per mil PDB,null,paleoceanography,null,null,N,null earth science paleoclimate paleoceanography delta 13C,Neogloboquadrina pachyderma sinistral,null,per mil PDB,null,paleoceanography,null,null,N,null earth science paleoclimate paleoceanography delta 18O,Cibicidoides wuellerstorfi,null,per mil PDB,null,paleoceanography,null,null,N,Measurements on pristine individual C. wuellerstorfi on Finigan earth science paleoclimate paleoceanography delta 13C,Cibicidoides wuellerstorfi,null,per mil PDB,null,paleoceanography,null,null,N,Measurements on individual Cibicidoides wuellerstorfi on VG Prism at NOSAMS earth science paleoclimate paleoceanography delta 18O,Cibicidoides wuellerstorfi,null,per mil PDB,null,paleoceanography,null,null,N,Measurements on VG Prism at NOSAMS earth science paleoclimate paleoceanography delta 18O,Nuttallides umbonifera,null,per mil PDB,null,paleoceanography,averaged,null,N,Measurements on Finigan earth science paleoclimate paleoceanography delta 13C,Nuttallides umbonifera,null,per mil PDB,null,paleoceanography,null,null,N,Measurements on Finigan earth science paleoclimate paleoceanography notes,null,null,null,null,paleoceanography,null,null,C,core ID earth science paleoclimate paleoceanography delta 18O,Cibicides kullenbergi,null,per mil PDB,null,paleoceanography,averaged,null,N,Measurements on VG Prism at NOSAMS earth science paleoclimate paleoceanography delta 18O,Nuttallides umbonifera,null,per mil PDB,null,paleoceanography,null,null,N,Measurements on Finigan earth science paleoclimate paleoceanography delta 18O,Cibicidoides wuellerstorfi,null,per mil PDB,null,paleoceanography,null,null,N,Measurements on individual Cibicidoides wuellerstorfi on VG Prism at NOSAMS earth science paleoclimate paleoceanography delta 13C,Cibicides kullenbergi,null,per mil PDB,null,paleoceanography,averaged,null,N,Measurements on VG Prism at NOSAMS earth science paleoclimate paleoceanography delta 13C,Cibicidoides sp.,null,per mil PDB,null,paleoceanography,null,null,N,Measurements on VG Prism at NOSAMS earth science paleoclimate paleoceanography delta 18O,Cibicidoides sp.,null,per mil PDB,null,paleoceanography,null,null,N,Measurements on VG Prism at NOSAMS earth science paleoclimate paleoceanography depth,null,null,centimeter,null,paleoceanography,null,null,N,null earth science paleoclimate paleocean oxygen isotopes earth science paleoclimate paleocean carbon isotopes earth science paleoclimate paleocean age control geoscientificInformation 26200 cal yr BP 5170 cal yr BP Complete -4.507 51.0733 -114.187 168.3117 -4250 -3225 Ocean Pacific Ocean North Pacific Ocean RNDB-11PC>LATITUDE 51.0733>LONGITUDE 167.975 Ocean Pacific Ocean North Pacific Ocean RNDB-13>LATITUDE 49.725>LONGITUDE 168.3117 Ocean Pacific Ocean Eastern Pacific Ocean KNR73-4PC>LATITUDE 1.848>LONGITUDE -110.2667 Ocean Pacific Ocean Eastern Pacific Ocean KNR73-6PC>LATITUDE 4.002>LONGITUDE -114.187 Ocean Pacific Ocean Western Pacific Ocean VNTR01-10PC>LATITUDE -4.507>LONGITUDE -102.015 Ocean Pacific Ocean Western Pacific Ocean S67-15FFC>LATITUDE -1.608>LONGITUDE 162.558 Ocean Pacific Ocean Eastern Pacific Ocean PLDS-7G>LATITUDE -3.338>LONGITUDE -102.453 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.D. Keigwin and S.J. Lehman 2015 Earth and Planetary Science Letters 425 93-104 10.1016/j.epsl.2015.05.025 https://www.sciencedirect.com/science/article/pii/S0012821X15003210

We investigate the apparent radiocarbon ventilation age in deep equatorial Pacific sediment cores and integrate those results with similar data from around the North Pacific Ocean in a reconstruction for the last glaciation. Here we use the simplest definition of apparent ventilation age: the difference in conventional 14C age between coexisting benthic and planktonic foraminifera, and we consider the glacial interval to have lasted between 15 and 25 14C ka. Most new data from both the Equatorial Pacific and the Emperor Seamounts in the northwestern Pacific come from maxima in abundance of benthic taxa because this strategy reduces the effect of bioturbation. Although there remains considerable scatter in the ventilation age estimates, on average, ventilation ages in the Equatorial Pacific were significantly greater below 3.2 km (~3100 +/-1125 yrs, n=15) than in the depth interval 2.0 to 3.0 km (~1600 +/-310 yrs, n=8). When compared to the average modern seawater D14C profile for the North Pacific, the Equatorial Pacific glacial data suggest an abyssal front located somewhere between 3.0 and 3.2 km modern water depth. Above that depth, the data may indicate slightly better ventilation than today, and below that depth, glacial Equatorial Pacific data are as old as last glacial maximum (LGM) deep water ages reported for the deep southern Atlantic. This suggests that a glacial reservoir of aged waters extended throughout the circumpolar Southern Ocean and into the Equatorial Pacific. Such a large volume of aged (and, by corollary, carbon-rich) water would help to account for the rise in atmospheric pCO2 and the fall in D14C as the glaciation drew to a close and deep ocean ventilation increased. STUDY NOTES: Radiocarbon and stable isotope (d18O and d13C) data measured on foraminifera from 7 Pacific Ocean sediment cores.

GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/keigwin2015/keigwin2015rndb-11pc.txt Text Data File; Core RNDB-11PC Stable Isotope Data GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/keigwin2015/keigwin2015.xls Excel Data File; Stable Isotope Data, 7 Cores GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/keigwin2015/keigwin2015rndb-13.txt Text Data File; Core RNDB-13PC/PG Stable Isotope Data GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/keigwin2015/keigwin2015vntr01-10pc.txt Text Data File; Core VNTR01-10PC Stable Isotope Data GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/keigwin2015/keigwin2015knr73-4pc.txt Text Data File; Core KNR73-4PC Stable Isotope Data GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/keigwin2015/keigwin2015plds-7g.txt Text Data File; Core PLDS-7G Stable Isotope Data GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/keigwin2015/keigwin2015ffc15.txt Text Data File; Core FFC15 Stable Isotope Data GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/keigwin2015/keigwin2015knr73-6pc.txt Text Data File; Core KNR73-6PC Stable Isotope Data USA/NOAA DIF Version 9.8.4 2018-12-11 2018-12-11