noaa-ocean-17918 Subtropical North Atlantic Stable Isotope Data During the mid-Pleistocene Poirier, R.K.; Billups, K. Subtropical North Atlantic Stable Isotope Data During the mid-Pleistocene 2015-01-28 NCDC-Paleoclimatology ONLINE Files Pending https://www.ncdc.noaa.gov/paleo/study/17918 Investigator R.K. Poirier Investigator K. Billups earth science paleoclimate paleoceanography depth,null,null,meter,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 18O,Cibicidoides mundula|Oridorsalis umbonatus,null,per mil VPDB,null,paleoceanography,null,null,N,>150 µm earth science paleoclimate paleoceanography delta 13C,Cibicidoides mundula|Oridorsalis umbonatus,null,per mil VPDB,null,paleoceanography,null,null,N,>150 µm earth science paleoclimate paleocean oxygen isotopes earth science paleoclimate paleocean carbon isotopes geoscientificInformation 1027150 cal yr BP 247390 cal yr BP Complete 33.683333 33.683333 -57.616667 -57.616667 -4584 -4584 Ocean Atlantic Ocean North Atlantic Ocean ODP1063>LATITUDE 33.683333>LONGITUDE -57.616667 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 Poirier, R.K. and K. Billups 2014 Paleoceanography 29 11 1046-1061 10.1002/2014PA002661

We reconstruct mid-Pleistocene (marine isotope stages (MISs) 13–18) deepwater hydrography at Ocean Drilling Program Site 1063 (4583m water depth, subtropical North Atlantic) using benthic foraminiferal stable isotope records. These new records complete an ~900 kyr long stratigraphy spanning MISs 8–29 (~250–1030 Ka) when combined with previously published records from Site 1063. The results indicate a change in the circulation regime of the abyssal subtropical North Atlantic during MIS 17. Prior to MIS 17, no significant glacial or interglacial d13C gradients are evident between Site 1063 and the deep South Atlantic. After MIS 17, interglacial intervals at Site 1063 are characterized by d13C values that consistently approach those recorded in the deep North Atlantic. Comparing Site 1063 d13C values to 26 additional published records throughout the entire Atlantic basin supports the idea that this d13C increase is unique to the deep North Atlantic. After MIS 17, the basin-wide influence of higher d13C values suggests an increased relative flux of northern sourced bottom waters during interglacial periods. The timing of northern sourced water influence at Site 1063 is consistent with the timing of a shift in the orientation of the Arctic Front. Thus, this shift may signify a link between the northward penetration of relatively warm, saline surface waters into the Norwegian-Greenland Seas stimulating deep convection. Our findings fit well with the model of Imbrie et al. (1993) for the importance of the Nordic heat pump in establishing strong 100 kyr cyclicity in late Pleistocene glacial cycles. STUDY NOTES: Newly produced stable isotope data from ODP Site 1063 (MIS 13-18) and composite Site 1063 stable isotope records (MIS 8-29) tuned to the LR04 stack of Lisiecki and Raymo (2005) Provided Keywords: Mid-Pleistocene transition, thermohaline circulation, glacial termination

GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/poirier2014/poirier2014-1063comp.txt Formatted Text File; ODP1063 composite record GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/poirier2014/poirier2014-1063.txt Formatted Text File; ODP1063 new data USA/NOAA DIF Version 9.8.4 2018-12-11 2018-12-11