noaa-ocean-21450 Subpolar North Atlantic V29-202 200KYr Foraminifer Isotope and Census Data Oppo, D.W.; Lehman, S.J. Subpolar North Atlantic V29-202 200KYr Foraminifer Isotope and Census Data 1995-11-01 NCDC-Paleoclimatology ONLINE Files Pending https://www.ncdc.noaa.gov/paleo/study/21450 Investigator D.W. Oppo Investigator S.J. Lehman earth science paleoclimate paleoceanography delta 18O,Globigerina bulloides,null,per mil PDB,null,paleoceanography,null,null,N,null earth science paleoclimate paleoceanography delta 18O,Neogloboquadrina pachyderma sinistral,null,per mil PDB,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 total planktic foraminifers,sediment,null,count per gram,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 delta 13C,Neogloboquadrina pachyderma sinistral,null,per mil PDB,null,paleoceanography,null,null,N,null earth science paleoclimate paleoceanography Neogloboquadrina pachyderma sinistral,sediment,null,count per gram,null,paleoceanography,null,null,N,null earth science paleoclimate paleoceanography Globigerina bulloides,sediment,null,count per gram,null,paleoceanography,null,null,N,null earth science paleoclimate paleoceanography ice rafted debris,sediment,null,percent,null,paleoceanography,null,null,N,percent of planktics earth science paleoclimate paleoceanography depth,null,null,centimeter,null,paleoceanography,null,null,N,null earth science paleoclimate paleocean oxygen isotopes earth science paleoclimate paleocean carbon isotopes earth science paleoclimate paleocean population abundance geoscientificInformation 200000 cal yr BP 0 cal yr BP Complete 60.38 60.38 -20.97 -20.97 -2658 -2658 Ocean Atlantic Ocean North Atlantic Ocean V29-202>LATITUDE 60.38>LONGITUDE -20.97 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 Delia W. Oppo, Scott J. Lehman 1995 Paleoceanography 10 5 901-910 10.1029/95PA02089 http://onlinelibrary.wiley.com/doi/10.1029/95PA02089/abstract

We generated ~200-kyr-long proxy records of surface and deepwater variability from a subpolar North Atlantic core (V29-202), enabling us to assess the linkage between surface and deepwater changes on suborbital timescales. In particular, we used a benthic d13C record to evaluate the deep water response to Dansgaard-Oeschger temperature oscillations and to Heinrich events, times of massive iceberg delivery to the North Atlantic. We found that the reduction of North Atlantic Deep Water (NADW) production was generally associated with cold or dropping sea surface temperatures (SSTs) as indicated by planktonic foraminiferal assemblages. The NADW contribution to the site did not drop appreciably during Heinrich events H4 through H2, probably because these events followed intervals of prolonged surface cooling already characterized by low rates of NADW production. By contrast NADW reduction appears to have been synchronous with H5. SST rise associated with both Dansgaard-Oeschger oscillations and Heinrich events was usually accompanied by increasing NADW strength. In a few cases the NADW recovery appeared to lag the SST rise; however, the apparent delay is most likely an artefact of the sedimentary record (low concentrations of benthic foraminifera). As a result of low benthic foraminiferal abundances during stage 6, the stage 6 benthic foraminiferal d13C record is of lower resolution than the younger part of the record. The stage 6 proxy records for surface hydrography nevertheless reveal millennial-scale oscillations similar to those seen in stage 3. The available d13C data suggest that NADW weakened in association with the cold portions of stage 6 SST oscillations. We also sought to confirm a recent study which concluded that there was little NADW variability during the peak of the last interglaciation, marine oxygen isotope substage 5e (Eemian). Isotope stage 5 was marked by a trend of increasing benthic d13C in V29-202. Rising d13C through isotope stage 5 is also seen in tropical surface water records and at some deep Atlantic sites and may reflect the common derivation of these water masses. Variations of >= 0.5 permil superimposed on this rising d13C trend within substage 5e in V29-202 are so far not evident in tropical feed waters and may therefore indicate that NADW production was weaker during the late than mid-Eemian. STUDY NOTES: Benthic and planktonic foraminifer assemblages from core V29-202 (subpolar North Atlantic), used as proxy records to reconstruct NADW variability.

GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/paleocean/sediment_files/complete/v29-202-tab.txt Alternate Format File; Oppo and Lehman 1995 Foraminifer Stable Isotope and Census Data GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/oppo1995/ Data Folder; Oppo and Lehman 1995 Foraminifer Stable Isotope and Census Data USA/NOAA DIF Version 9.8.4 2019-06-06 2019-06-06