noaa-ocean-25010 Atlantic Ocean Stable Isotope, Geochemistry and Cadmium Seawater Data over the last 25,000 years Oppo, D.W. Atlantic Ocean Stable Isotope, Geochemistry and Cadmium Seawater Data over the last 25,000 years 2018-08-29 NCDC-Paleoclimatology ONLINE Files Pending https://www.ncdc.noaa.gov/paleo/study/25010 Investigator D.W. Oppo earth science paleoclimate paleocean geochemistry earth science paleoclimate paleocean oxygen isotopes earth science paleoclimate paleocean carbon isotopes geoscientificInformation 24797 cal yr BP 66 cal yr BP Complete -60 70 -84 20 -2642 0 Ocean Atlantic Ocean North Atlantic Ocean KNR197-3-47CDH>LATITUDE 7.84>LONGITUDE -53.66 Ocean Atlantic Ocean North Atlantic Ocean KNR197-3-36GGC>LATITUDE 8.42>LONGITUDE -52.79 Ocean Atlantic Ocean North Atlantic Ocean KNR197-3-53GGC>LATITUDE 8.23>LONGITUDE -53.23 Ocean Atlantic Ocean North Atlantic Ocean KNR197-3 core set>LATITUDE >LONGITUDE Ocean Atlantic Ocean North Atlantic Ocean KNR197-3-9GGC>LATITUDE 7.93>LONGITUDE -53.575167 Ocean Atlantic Ocean North Atlantic Ocean KNR197-3-60GGC>LATITUDE 8.44>LONGITUDE -52.97 Ocean Atlantic Ocean North Atlantic Ocean KNR140 core set>LATITUDE >LONGITUDE Ocean Atlantic Ocean North Atlantic Ocean KNR197-3-46CDH>LATITUDE 7.836>LONGITUDE -53.663333 Ocean Atlantic Ocean North Atlantic Ocean Demerara Rise>LATITUDE 8.5>LONGITUDE -53 Ocean Atlantic Ocean Atlantic Ocean>LATITUDE >LONGITUDE Ocean Atlantic Ocean North Atlantic Ocean KNR197-3-23GGC>LATITUDE 7.58>LONGITUDE -53.91 Ocean Atlantic Ocean North Atlantic Ocean KNR197-3-45GGC>LATITUDE 8.3>LONGITUDE -53.17 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 Oppo, D.W., Gebbie, G., Huang, K., Curry, W.B., Marchitto, T.M., and Pietro, K.R. 2018 Paleoceanography and Paleoclimatology 33 1013-1034 10.1029/2018PA003408

The chemical composition of benthic foraminifera from marine sediment cores provides information on how glacial subsurface water properties differed from modern, but separating the influence of changes in the origin and end-member properties of subsurface water from changes in flows and mixing is challenging. Spatial gaps in coverage of glacial data add to the uncertainty. Here we present new data from cores collected from the Demerara Rise in the western tropical North Atlantic, including cores from the modern tropical phosphate maximum at Antarctic Intermediate Water (AAIW) depths. The results suggest lower phosphate concentration and higher carbonate saturation state within the phosphate maximum than modern despite similar carbon isotope values, consistent with less accumulation of respired nutrients and carbon, and reduced air-sea gas exchange in source waters to the region. An inversion of new and published glacial data confirms these inferences and further suggests that lower preformed nutrients in AAIW, and partial replacement of this still relatively high-nutrient AAIW with nutrient-depleted, carbonate-rich waters sourced from the region of the modern-day northern subtropics, also contributed to the observed changes. The results suggest that glacial preformed and remineralized phosphate were lower throughout the upper Atlantic, but deep phosphate concentration was higher. The inversion, which relies on the fidelity of the paleoceanographic data, suggests that the partial replacement of North Atlantic sourced deep water by Southern Ocean Water was largely responsible for the apparent deep North Atlantic phosphate increase, rather than greater remineralization.

GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/oppo2018/oppo2018-knr197-3-45.txt NOAA Template File; 45GGC Benthic Isotope and radiocarbon data GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/oppo2018/oppo2018-s13-knr140-glacial.txt NOAA Template File; KNR140-2 Glacial Elemental Cd/Ca and B/Ca data - S13 GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/oppo2018/oppo2018-knr197-3-23.txt NOAA Template File; 23GGC Benthic Isotope and radiocarbon data GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/oppo2018/oppo2018-s1-chem.txt NOAA Template File; KNR197-3 core-top elemental and CdW data - S1 GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/oppo2018/oppo2018-s15-isot.txt NOAA Template File; Atlantic Ocean Glacial d13C and d18O data - S15 GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/oppo2018/oppo2018-knr197-3-47.txt NOAA Template File; 47CDH Benthic Isotope and radiocarbon data GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/oppo2018/oppo2018-s3-knr197-3mc.txt NOAA Template File; KNR197-3 core-top isotope data - S3 GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/oppo2018/oppo2018-s12-knr197-3-glacial.txt NOAA Template File; KNR197-3 Glacial Cd/Ca and B/Ca data - S12 GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/oppo2018/oppo2018-knr197-3-9.txt NOAA Template File; 9GGC Benthic Isotope and radiocarbon data GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/oppo2018/oppo2018-knr197-3-46.txt NOAA Template File; 46CDH Benthic Isotope and radiocarbon data GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/oppo2018/oppo2018-knr197-3-60.txt NOAA Template File; 60GGC Benthic Isotope and radiocarbon data GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/oppo2018/oppo2018-s2-ctd-cdw.txt NOAA Template File; Demerara Rise CdW data - S2 GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/oppo2018/oppo2018-knr197-3-36.txt NOAA Template File; 36GGC Benthic Isotope and radiocarbon data GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/oppo2018/oppo2018-s14-cdw.txt NOAA Template File; Atlantic Ocean Glacial CdW data - S14 GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/oppo2018/oppo2018-knr197-3-53.txt NOAA Template File; 53GGC Benthic Isotope and radiocarbon data USA/NOAA DIF Version 9.8.4 2019-06-06 2019-06-06