noaa-ocean-20127 North Atlantic (ODP 984) Stable Isotope, Sediment and Population Abundance Data during the MIS 6 Glaciation and MIS 5 Interglacial Mokeddem, Z.; McManus, J.F. North Atlantic (ODP 984) Stable Isotope, Sediment and Population Abundance Data during the MIS 6 Glaciation and MIS 5 Interglacial 2016-05-09 NCDC-Paleoclimatology ONLINE Files Pending https://www.ncdc.noaa.gov/paleo/study/20127 Investigator Z. Mokeddem Investigator J.F. McManus earth science paleoclimate paleoceanography identified foraminifer,null,null,percent,null,paleoceanography,null,microscopy,N,Cibicidoides sp. earth science paleoclimate paleoceanography delta 18O,Neogloboquadrina incompta,null,per mil PDB,null,paleoceanography,null,isotope ratio mass spectrometry,N,null earth science paleoclimate paleoceanography age,null,null,calendar kiloyear before present,null,paleoceanography,null,null,N,null earth science paleoclimate paleoceanography Neogloboquadrina pachyderma sinistral,null,null,percent,null,paleoceanography,null,microscopy,N,left coiling earth science paleoclimate paleoceanography Neogloboquadrina incompta,null,null,percent,null,paleoceanography,null,microscopy,N,null earth science paleoclimate paleoceanography delta 18O,Cibicidoides sp.,null,per mil PDB,null,paleoceanography,null,isotope ratio mass spectrometry,N,null earth science paleoclimate paleoceanography sample identification,null,null,null,null,paleoceanography,null,null,C,null earth science paleoclimate paleoceanography delta 18O,Neogloboquadrina pachyderma,null,per mil PDB,null,paleoceanography,null,isotope ratio mass spectrometry,N,null earth science paleoclimate paleoceanography identified foraminifer,null,null,percent,null,paleoceanography,null,microscopy,N,Turborotalia quinqueloba earth science paleoclimate paleoceanography ice rafted debris,null,null,percent,null,paleoceanography,null,microscopy,N,null earth science paleoclimate paleoceanography delta 18O,planktic foraminifer,null,per mil PDB,null,paleoceanography,null,isotope ratio mass spectrometry,N,Turborotalita quinqueloba earth science paleoclimate paleoceanography delta 13C,Cibicidoides sp.,null,per mil PDB,null,paleoceanography,null,isotope ratio mass spectrometry,N,null earth science paleoclimate paleoceanography depth,null,null,centimeter,null,paleoceanography,null,null,N,null earth science paleoclimate paleocean oxygen isotopes earth science paleoclimate paleocean lithology earth science paleoclimate paleocean carbon isotopes earth science paleoclimate paleocean population abundance geoscientificInformation 167000 cal yr BP 83000 cal yr BP Complete 61.43 61.43 -24.08 -24.08 -1648 -1648 Ocean Atlantic Ocean North Atlantic Ocean ODP 984>LATITUDE 61.43>LONGITUDE -24.08 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 Zohra Mokeddem, Jerry F. McManus 2016 Paleoceanography 10.1002/2015PA002813

Rapidly accumulating sediments from the Bjorn drift deposit south of Iceland are studied for comparison of glacial/interglacial climate changes related to millennial variability of the subpolar surface and deep ocean circulation in the North Atlantic. High-resolution faunal, isotopic, and sedimentary analyses reveal a strong multimillennial climatic variability interpreted as oscillations in heat transport westward south of Iceland during marine isotope stage 6 (MIS 6), possibly related to the strength of the subpolar gyre (SPG). The oscillations persisted from MIS 6 through the following interglacial (MIS 5), although with diminished magnitude, and were respectively characterized by repeated advances of the polar front south of Iceland during MIS 6 and southward migrations of the Arctic front due to cold surface outflow through the East Greenland and East Iceland Currents during MIS 5. Incursions of cold, fresh surface waters, and drifting ice affected the dynamics of the SPG, episodically causing it to weaken and contract to the northwest. During these intervals of diminished SPG, the northward transport of subtropical heat and salt was strengthened and preferentially conveyed to the northeast past Iceland, enhancing deep‐water formation in the Nordic Seas. By contrast, when the SPG was strong, more subtropical water and its associated heat were entrained within the relatively warm Irminger Current flowing westward south of Iceland. These oceanographic oscillations were associated with repeated multimillennial cooling and warming episodes during the glacial stage MIS 6, equivalent to the Dansgaard-Oeschger cycles of the last glaciation. STUDY NOTES: Provided Keywords: MIS 6, MIS 5, Stadials/Interstadials, Subpolar North Atlantic, Oceanic Frontal zones, Stable isotopes

GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/mokeddem2016/mokeddem2016-odp984.txt Formatted Text File; ODP 984 Data USA/NOAA DIF Version 9.8.4 2019-06-07 2019-06-07