Brazil Margin LGM and Holocene Benthic Foraminiferal Cadmium Data Makou, M.C.; Oppo, D.W.; Curry, W.B. Makou, M.C. Oppo, D.W. Curry, W.B. Meridional Overturning Circulation (MOC) earth science/paleoclimate/paleoceanography (notes,null,null,null,null,paleoceanography,null,null,C,foraminiferal sample) earth science/paleoclimate/climate reconstructions|paleoceanography (cadmium,cadmium/calcium,null,nanomole per kilogram,null,climate reconstructions|paleoceanography,null,null,N,seawater cadmium) earth science/paleoclimate/paleoceanography (depth,null,null,meter,null,paleoceanography,null,null,N,null) earth science/paleoclimate/climate reconstructions|paleoceanography (delta 13C,delta 13C,null,per mil,null,climate reconstructions|paleoceanography,null,null,N,estimated delta 13C due to air/sea exchange of CO2) earth science/paleoclimate/paleoceanography (latitude,null,null,degree south,null,paleoceanography,null,null,C,null) earth science/paleoclimate/paleoceanography (longitude,null,null,degree west,null,paleoceanography,null,null,C,null) earth science/paleoclimate/paleoceanography (delta 13C,benthic foraminifer,null,per mil PDB,null,paleoceanography,null,null,N,null) earth science/paleoclimate/paleoceanography (cadmium/calcium,benthic foraminifer,null,dimensionless,null,paleoceanography,null,null,N,null) earth science/paleoclimate/paleoceanography (depth,null,null,centimeter,null,paleoceanography,null,null,N,sample depth) earth science/paleoclimate/paleoceanography (notes,null,null,null,null,paleoceanography,null,null,C,core ID) earth science/paleoclimate/paleocean (17JPC>LATITUDE -27.6972>LONGITUDE -46.494) (14GGC>LATITUDE -26.6807>LONGITUDE -46.4487) Paleoceanographic studies using benthic foraminiferal Cd as a nutrient tracer have provided a robust means of reconstructing glacial Atlantic Ocean water mass geometry, but a paucity of data from the South Atlantic above 1200 m has limited investigation of Antarctic Intermediate Water (AAIW) configuration and formation. A new Cd depth profile from Brazil margin sediments suggests that AAIW penetrated northward at 1100 m to at least 27°S in the glacial Atlantic. It exhibited substantially reduced d13Cas values, confirming preliminary evidence that this AAIW was unique to the glacial Atlantic and that it formed differently than today, with less atmospheric contact. STUDY NOTES: Benthic foraminiferal Cd results for a Brazil margin sediment depth transect. Data are provided for the last glacial maximum (LGM) and core top sediments. Individual core locations, sample depths, and the type of foraminifera used are provided, and Cd composition is reported as Cd/Ca and CdW. Foraminiferal carbon isotopic results from previous investigations were used to calculate the portion of the carbon isotopic signal arising from air/sea exchange (d13Cas) of carbon dioxide (see references in cited publication). The reported water depths have not been corrected for reduced LGM sea level. Core top Cd and d13Cas results for cores 10 GGC and 33 GGC are considered erroneous because relative standard deviations for multiple analyses were > 20%. See Makou et al. 2010 for further discussion of the results. NCDC-Paleoclimatology https://www.ncdc.noaa.gov/data-access/paleoclimatology-data - Bauer Bruce Investigator : Makou, M.C. Investigator : Oppo, D.W. Investigator : Curry, W.B. 2011-02-10 ONLINE Files online, ASCII https://www.ncdc.noaa.gov/paleo/study/10531 https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/makou2010b/makou2010b.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/makou2010b/makou2010b.xls https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/makou2010b/makou2010b.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/makou2010b/makou2010b.xls English https://www.ncdc.noaa.gov/paleo/study/10531 https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/makou2010b/makou2010b.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/makou2010b/makou2010b.xls Makou, M.C., D.W. Oppo, and W.B. Curry. 2010. South Atlantic intermediate water mass geometry for the last glacial maximum from foraminiferal Cd/Ca. Paleoceanography 25, PA4101, doi:10.1029/2010PA001962. START YEAR: 21000 cal yr BP * END YEAR: 18000 cal yr BP -46.494 -27.6972 -46.4487 -26.6807