Deep-sea oxygen depletion and ocean carbon sequestration during the last ice age

noaa-ocean-25630 Deep-sea oxygen depletion and ocean carbon sequestration during the last ice age Anderson, R.F.; Sachs, J.P.; Fleisher, M.Q.; Allen, K.A.; Yu, J.; Koutavas, A.; Jaccard, S.L. Deep-sea oxygen depletion and ocean carbon sequestration during the last ice age 2018-11-23 NCDC-Paleoclimatology ONLINE Files Pending https://www.ncdc.noaa.gov/paleo/study/25630 Investigator R.F. Anderson Investigator J.P. Sachs Investigator M.Q. Fleisher Investigator K.A. Allen Investigator J. Yu Investigator A. Koutavas Investigator S.L. Jaccard earth science paleoclimate paleocean biomarkers earth science paleoclimate paleocean radiogenic isotope geoscientificInformation 40000 cal yr BP 0 cal yr BP Complete -3.383 .11 -139.7157 -82.0667 -4354 -617 Ocean Pacific Ocean South Pacific Ocean RC11-238>LATITUDE -1.52>LONGITUDE -85.82 Ocean Pacific Ocean Eastern Pacific Ocean VM19-27>LATITUDE -.4667>LONGITUDE -82.0667 Ocean Pacific Ocean Central Pacific Ocean TT013-18PC>LATITUDE -1.84>LONGITUDE -139.71 Ocean Pacific Ocean Eastern Pacific Ocean VM21-30>LATITUDE -1.2167>LONGITUDE -89.6833 Ocean Pacific Ocean Eastern Pacific Ocean VM19-30>LATITUDE -3.383>LONGITUDE -83.517 Ocean Pacific Ocean Eastern Pacific Ocean TT013-MC19>LATITUDE -1.868>LONGITUDE -139.7157 Ocean Pacific Ocean Eastern Pacific Ocean VM19-28>LATITUDE -2.3667>LONGITUDE -84.65 Ocean Pacific Ocean Central Pacific Ocean TT013-72PC>LATITUDE .11>LONGITUDE -139.4 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 Anderson R.F., J.P. Sachs, M.Q. Fleisher, K.A. Allen, J. Yu, A. Koutavas, S.L. Jaccard 2018 Deep-sea oxygen depletion and ocean carbon sequestration during the last ice age Global Biogeochemical Cycles under review Anderson, R.F., M.Q. Fleisher, and Y. Lao 2006 Glacial-Interglacial variability in the delivery of dust to the central equatorial Pacific Ocean Earth and Planetary Science Letters 242 406-414 10.1016/j.epsl.2005.11.061 Anderson, R.F., M.Q. Fleisher, Y. Lao, and G. Winckler 2008 Modern CaCO3 preservation in equatorial Pacific sediments in the context of recent glacial cycles Marine Chemistry 111 30-46 10.1016/j.marchem.2007.11.011 Bradtmiller, L.I., R.F. Anderson, M.Q. Fleisher, and L.H. Burckle 2007 Opal burial in the equatorial Atlantic Ocean over the last 30 ka: Implications for glacial-interglacial changes in the ocean silicon cycle Paleoceanography 10.1029/2006PA001282 Hayes, C.T., R.F. Anderson, and M.Q. Fleisher 2011 Opal accumulation rates in the equatorial Pacific and mechanisms of deglaciation Paleoceanography 10.1029/2010PA002008 Koutavas, A., and J.P. Sachs 2008 Northern timing of deglaciation in the eastern equatorial Pacific from alkenone paleothermometry Paleoceanography 23 PA4205 10.1029/2008PA001593 Koutavas, A. and J. Lynch-Stieglitz. 2003. Glacial-interglacial dynamics of the eastern equatorial Pacific cold tongue-Intertropical Convergence Zone system reconstructed from oxygen isotope records. Paleoceanography 18(4), 1089. Lyle, M., A.C. Mix, and N.G. Pisias 2002 Patterns of CaCO3 deposition in the eastern tropical Pacific Ocean for the last 150 kyr: Evidence for a southeast Pacific depositional spike during marine isotope stage (MIS) 2 Paleoceanography 17 10.1029/2000PA000538 Martinson, D.G., N.G. Pisias, J.D. Hays, J. Imbrie, T.C. Moore, and N.J. Shackleton 1987 Age dating and the orbital theory of the ice ages - Development of a high-resolution 0 to 300,000-year chronostratigraphy Quaternary Research 27 1-29 10.1016/0033-5894(87)90046-9 Murray, R.W., C. Knowlton, M. Leinen, A.C. Mix, and C.H. Polsky 2000 Export production and carbonate dissolution in the central equatorial Pacific Ocean over the past 1 Ma Paleoceanography 10.1029/1999PA000457 Shackleton, N.J., M.A. Hall, J. Line, and C. Shuxi 1983 Carbon isotope data In core V19-30 confirm reduced carbon-dioxide concentration In the ice-age atmosphere Nature 306 319-322 10.1038/306319a0 Winckler, G., R.F. Anderson, S.L. Jaccard, and F. Marcantonio 2016 Ocean dynamics, not dust, have controlled equatorial Pacific productivity over the past 500,000 years Proceedings of the National Academy of Sciences 113 22 6119-6124 10.1073/pnas.1600616113

A possible imprint on equatorial Pacific sediments of a deglacial reinvigoration of the Southern Ocean overturning is increased opal accumulation rate. This would arise from the transmission of silica-rich deep water to the equatorial thermocline via Subantarctic Mode Water and an associated increase in diatom productivity. In search of this imprint, sediment cores from the central (TT013-PC72) and eastern (V19-30) equatorial Pacific have been analyzed for 230Th-normalized opal accumulation rates over the past five and three glacial terminations, respectively. Equatorial opal accumulation rates sustained relatively low values over much of the records and were punctuated by large increases centered on some terminations, but not all. Furthermore, two periods of increased opal flux were observed that do not coincide with terminations. Sources other than the Southern Ocean may need to be considered in the silica budget of the equatorial Pacific, but the d13C of Neogloboquadrina dutertrei can be used to support the presence of a deepwater nutrient signal in each case. Although a common deglacial mechanism, or a common imprint thereof, for each of the late Pleistocene glaciations remains elusive, the combination of opal flux and d13C of N. dutertrei provides a diagnostic for past injection of deepwater nutrients into the Equatorial Undercurrent. STUDY NOTES: Combination of data from previous publications and new data Provided Keywords: Pacific Ocean, deglacial, last ice age

GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/anderson2019/anderson2018-vm19-30.txt NOAA Template File; VM19-30 Biomarker and Radiogenic Isotope Data GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/anderson2019/anderson2018-vm21-30.txt NOAA Template File; VM21-30 Biomarker and Radiogenic Isotope Data GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/anderson2019/anderson2018-pc72.txt NOAA Template File; TT013-PC72 Biomarker and Radiogenic Isotope Data GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/anderson2019/anderson2018-mc19.txt NOAA Template File; TT013-MC19 Biomarker and Radiogenic Isotope Data GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/anderson2019/anderson2018-rc11-238.txt NOAA Template File; RC11-238 Biomarker and Radiogenic Isotope Data GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/anderson2019/anderson2018-vm19-28.txt NOAA Template File; VM19-28 Biomarker and Radiogenic Isotope Data GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/anderson2019/anderson2018-pc18.txt NOAA Template File; TT013-PC18 Biomarker and Radiogenic Isotope Data GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/anderson2019/anderson2018-vm19-27.txt NOAA Template File; VM19-27 Biomarker and Radiogenic Isotope Data USA/NOAA DIF Version 9.8.4 2019-07-03 2019-07-03