A stagnation event in the deep South Atlantic during the last interglacial period

noaa-ocean-17455 Deep South Atlantic SST Reconstruction and Uranium and d13C Data during the Last Interglacial Period Hayes, C.T.; Martínez-Garcia, A.; Hasenfratz, A.P.; Jaccard, S.L.; Hodell, D.A.; Sigman, D.M.; Haug, G.H.; Anderson, R.F. Deep South Atlantic SST Reconstruction and Uranium and d13C Data during the Last Interglacial Period 2014-11-24 NCDC-Paleoclimatology ONLINE Files Pending https://www.ncdc.noaa.gov/paleo/study/17455 Investigator C.T. Hayes Investigator A. Martínez-Garcia Investigator A.P. Hasenfratz Investigator S.L. Jaccard Investigator D.A. Hodell Investigator D.M. Sigman Investigator G.H. Haug Investigator R.F. Anderson 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 uranium,sediment,null,microgram per square centimeter per kiloyear,null,paleoceanography,null,null,N,"authigenic mass accumulation rate; ""instantaneous"" estimate" earth science paleoclimate paleoceanography accumulation rate,sediment,null,gram per square centimeter per kiloyear,null,paleoceanography,averaged,null,N,average MAR integrated between age model tie points earth science paleoclimate climate reconstructions|paleoceanography sea surface temperature,null,null,degree Celsius,null,climate reconstructions|paleoceanography,null,null,N,based on the marine lipid index TEX-86L calibration of Kim et al. (2012) earth science paleoclimate paleoceanography uranium,sediment,null,parts per million,null,paleoceanography,corrected,null,N,authigenic; corrected for detrital U based on measured 232Th earth science paleoclimate paleoceanography uranium,sediment,null,microgram per square centimeter per kiloyear,null,paleoceanography,averaged,null,N,average aU MAR integrated between age model tie points earth science paleoclimate paleoceanography 230Th excess,sediment,null,dimensionless,null,paleoceanography,null,null,N,230Th focus factor; ratio of excess 230Th inventory to water column 230Th production calculated as averages between age model tie-points earth science paleoclimate paleoceanography delta 13C,Cibicidoides wuellerstorfi,null,per mil VPDB,null,paleoceanography,null,null,N,>150 micron fraction earth science paleoclimate paleocean geochemistry earth science paleoclimate paleocean carbon isotopes earth science paleoclimate paleocean reconstruction geoscientificInformation Sea Surface Temperature Reconstruction 158990 cal yr BP 118121 cal yr BP Complete -53.18035 -53.18035 5.130333 5.130333 -2807 -2807 Ocean Atlantic Ocean South Atlantic Ocean ODP1094>LATITUDE -53.18035>LONGITUDE 5.130333 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 Hayes, C.T., A. Martinez-Garcia, A.P. Hasenfratz, S.L. Jaccard, D.A. Hodell, D.M. Sigman, G.H. Haug, and R.F. Anderson 2014 A stagnation event in the deep South Atlantic during the last interglacial period Science 346 6216 1514-1517 10.1126/science.1256620

Southern Ocean sediments reveal a spike in authigenic uranium 127,000 years ago, within the last interglacial, reflecting decreased oxygenation of deep water by Antarctic Bottom Water (AABW). Unlike ice age reductions in AABW, the interglacial stagnation event appears decoupled from open ocean conditions and may have resulted from coastal freshening due to mass loss from the Antarctic ice sheet. AABW reduction coincided with increased North Atlantic Deep Water (NADW) formation, and the subsequent reinvigoration in AABW coincided with reduced NADW formation. Thus, alternation of deep water formation between the Antarctic and the North Atlantic, believed to characterize ice ages, apparently also occurs in warm climates. STUDY NOTES: This file contains previously unpublished data on sedimentary authigenic uranium, sediment focusing and accumulation rates, benthic formaniferal delta-13C and the biomarker index TEX86L.

GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/hayes2014/hayes2014.txt Formatted Text File; ODP1094 Data USA/NOAA DIF Version 9.8.4 2018-12-11 2018-12-11