noaa-ocean-18318 Subantarctic Atlantic Ocean Foraminifera-bound d15N, Iron and Alkenone Flux Data for the last 160,000 years Martínez-Garcia, A.; Sigman, D.M.; Ren, H.; Anderson, R.F.; Straub, M.; Hodell, D.A.; Jaccard, S.L.; Eglinton, T.I.; Haug, G.H. Subantarctic Atlantic Ocean Foraminifera-bound d15N, Iron and Alkenone Flux Data for the last 160,000 years 2015-04-02 NCDC-Paleoclimatology ONLINE Files Pending https://www.ncdc.noaa.gov/paleo/study/18318 Investigator A. Martínez-Garcia Investigator D.M. Sigman Investigator H. Ren Investigator R.F. Anderson Investigator M. Straub Investigator D.A. Hodell Investigator S.L. Jaccard Investigator T.I. Eglinton Investigator G.H. Haug earth science paleoclimate paleoceanography age,null,null,calendar kiloyear before present,null,paleoceanography,null,null,N,null earth science paleoclimate paleoceanography iron,sediment,null,milligram per square centimeter per kiloyear,null,paleoceanography,null,null,N,null earth science paleoclimate paleoceanography delta 15N,Globigerina bulloides,null,per mil AIR,null,paleoceanography,null,null,N,null earth science paleoclimate paleoceanography alkenone,sediment,null,nanogram per square centimeter per kiloyear,null,paleoceanography,null,null,N,Alkenone flux earth science paleoclimate paleocean geochemistry earth science paleoclimate paleocean biomarkers earth science paleoclimate paleocean nitrogen isotopes geoscientificInformation 160020 cal yr BP 1380 cal yr BP Complete -42.908333 -42.908333 8.9 8.9 -3702 -3702 Ocean Atlantic Ocean South Atlantic Ocean ODP 1090>LATITUDE -42.908333>LONGITUDE 8.9 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 Martinez-Garcia, A., D.M. Sigman, H. Ren, R.F. Anderson, M. Straub, D.A. Hodell, S.L. Jaccard, T.I. Eglinton, and G.H. Haug 2014 Science 343 6177 1347-1350 10.1126/science.1246848 http://www.sciencemag.org/content/343/6177/1347.abstract

John H. Martin, who discovered widespread iron limitation of ocean productivity, proposed that dust-borne iron fertilization of Southern Ocean phytoplankton caused the ice age reduction in atmospheric carbon dioxide (CO2). In a sediment core from the Subantarctic Atlantic, we measured foraminifera-bound nitrogen isotopes to reconstruct ice age nitrate consumption, burial fluxes of iron, and proxies for productivity. Peak glacial times and millennial cold events are characterized by increases in dust flux, productivity, and the degree of nitrate consumption; this combination is uniquely consistent with Subantarctic iron fertilization. The associated strengthening of the Southern Ocean's biological pump can explain the lowering of CO2 at the transition from mid-climate states to full ice age conditions as well as the millennial-scale CO2 oscillations STUDY NOTES: Foraminifera-bound d15N, iron and alkenone fluxes measured in ODP Site 1090 over the past glacial cycle. Provided Keywords: Iron Fertilization, Carbon Dioxide, Southern Ocean, Nitrogen Isotopes, Alkenones

GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/martinez-garcia2014/martinez-garcia2014-alk.txt Formatted Text File; ODP1090 Alkenone Flux Data GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/martinez-garcia2014/martinez-garcia2014-fe.txt Formatted Text File; ODP1090 Fe Flux Data GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/martinez-garcia2014/martinez-garcia2014-d15n.txt Formatted Text File; ODP1090 d15N Data USA/NOAA DIF Version 9.8.4 2018-12-11 2018-12-11