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. Hayes, C.T. Martínez-Garcia, A. Hasenfratz, A.P. Jaccard, S.L. Hodell, D.A. Sigman, D.M. Haug, G.H. Anderson, R.F. Sea Surface Temperature Reconstruction 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 earth science/paleoclimate/paleocean earth science/paleoclimate/paleocean (ODP1094>LATITUDE -53.18035>LONGITUDE 5.130333) 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. NCDC-Paleoclimatology https://www.ncdc.noaa.gov/data-access/paleoclimatology-data - Bauer Bruce Investigator : Hayes, C.T. Investigator : Martínez-Garcia, A. Investigator : Hasenfratz, A.P. Investigator : Jaccard, S.L. Investigator : Hodell, D.A. Investigator : Sigman, D.M. Investigator : Haug, G.H. Investigator : Anderson, R.F. 2014-11-24 ONLINE Files online, ASCII https://www.ncdc.noaa.gov/paleo/study/17455 https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/hayes2014/hayes2014.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/hayes2014/hayes2014.txt English https://www.ncdc.noaa.gov/paleo/study/17455 https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/hayes2014/hayes2014.txt Hayes, C.T., A. Martinez-Garcia, A.P. Hasenfratz, S.L. Jaccard, D.A. Hodell, D.M. Sigman, G.H. Haug, and R.F. Anderson2014A stagnation event in the deep South Atlantic during the last interglacial periodScience34662161514-151710.1126/science.1256620 START YEAR: 158990 cal yr BP * END YEAR: 118121 cal yr BP 5.130333 -53.18035 5.130333 -53.18035