Gardar Drift Stable Isotope and Sediment Data since ~300 ka Elmore, A.C.; Wright, J.D.; Chalk, T.B. Elmore, A.C. Wright, J.D. Chalk, T.B. earth science/paleoclimate/paleoceanography (delta 18O,Globigerina bulloides,null,per mil PDB,null,paleoceanography,null,null,N,null) earth science/paleoclimate/paleoceanography (age,null,null,calendar kiloyear before present,null,paleoceanography,null,null,N,null) earth science/paleoclimate/paleoceanography (delta 13C,Globigerina bulloides,null,per mil PDB,null,paleoceanography,null,null,N,null) earth science/paleoclimate/paleoceanography (delta 18O,Cibicidoides wuellerstorfi,null,per mil PDB,null,paleoceanography,null,null,N,null) earth science/paleoclimate/paleoceanography (delta 13C,Cibicidoides wuellerstorfi,null,per mil PDB,null,paleoceanography,null,null,N,null) earth science/paleoclimate/paleoceanography (calcium carbonate,sediment,null,weight percent,null,paleoceanography,null,null,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 (KN166-14 3GGC>LATITUDE 55.52>LONGITUDE -26.53) (KN166-14 11JPC>LATITUDE 56.233333>LONGITUDE -27.65) Benthic foraminiferal stable isotopic records from a transect of sediment cores south of the Iceland-Scotland Ridge reveal that the penetration depth of Iceland-Scotland Overflow Water (ISOW) varied on orbital timescales with precessional pacing over the past ~ 200 kyr. Similar, higher benthic foraminiferal d13C values (~ 1.0 ‰) were recorded at all transect sites downstream of the Iceland-Scotland Ridge during interglacial periods (Marine Isotope Chrons 5 and 1), indicating a deeply penetrating ISOW. During glacial periods (Marine Isotope Chrons 6, 4, and 2), benthic foraminiferal d13C values from the deeper (2700-3300 m), southern sites within this transect were significantly lower (~ 0.5 ‰) than values from the northern (shallower) portion of the transect (~ 1.0 ‰), reflecting a shoaling of ISOW and greater influence of glacial Southern Component Water (SCW) in the deep Northeast Atlantic. Particularly during intermediate climate states, ISOW strength is driven by precesional cycles, superimposed on the large-scale glacial-interglacial ISOW variability. Millennial-scale variability in the penetration of ISOW, likely caused by high-frequency Heinrich and Dansgaard-Oeschger Events, is most pronounced during intermediate climate states. STUDY NOTES: Provided Keywords: North Atlantic Deep Water (NADW), Insolation NCDC-Paleoclimatology https://www.ncdc.noaa.gov/data-access/paleoclimatology-data - Bauer Bruce Investigator : Elmore, A.C. Investigator : Wright, J.D. Investigator : Chalk, T.B. 2015-10-08 ONLINE Files online, ASCII https://www.ncdc.noaa.gov/paleo/study/19339 https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/elmore2015-p3/elmore2015-p3-11jpc.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/elmore2015-p3/elmore2015-p3-3ggc.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/elmore2015-p3/elmore2015-p3-11jpc.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/elmore2015-p3/elmore2015-p3-3ggc.txt English https://www.ncdc.noaa.gov/paleo/study/19339 https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/elmore2015-p3/elmore2015-p3-11jpc.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/elmore2015-p3/elmore2015-p3-3ggc.txt Elmore, A.C., J.D. Wright, and T.B. Chalk 2015Precission-driven changes in Iceland-Scotland Overflow Water penetration and bottom water circulation on Gardar Drift since ~200 ka Palaeogeography, Palaeoclimatology, Palaeoecology440551-56310.1016/j.palaeo.2015.09.042 START YEAR: 309460 cal yr BP * END YEAR: 0 cal yr BP -27.65 55.52 -26.53 56.233333