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. Mokeddem, Z. McManus, J.F. 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 earth science/paleoclimate/paleocean earth science/paleoclimate/paleocean earth science/paleoclimate/paleocean (ODP 984>LATITUDE 61.43>LONGITUDE -24.08) 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 NCDC-Paleoclimatology https://www.ncdc.noaa.gov/data-access/paleoclimatology-data - Bauer Bruce Investigator : Mokeddem, Z. Investigator : McManus, J.F. 2016-05-09 ONLINE Files online, ASCII https://www.ncdc.noaa.gov/paleo/study/20127 https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/mokeddem2016/mokeddem2016-odp984.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/mokeddem2016/mokeddem2016-odp984.txt English https://www.ncdc.noaa.gov/paleo/study/20127 https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/mokeddem2016/mokeddem2016-odp984.txt Zohra Mokeddem, Jerry F. McManus2016Persistent climatic and oceanic oscillations in the subpolar North Atlantic during MIS 6 glaciation and MIS 5 interglacialPaleoceanography10.1002/2015PA002813 START YEAR: 167000 cal yr BP * END YEAR: 83000 cal yr BP -24.08 61.43 -24.08 61.43