noaa-ocean-19782 Chronostratigraphy and stable isotopes of Site U1385 (Shackleton site) on the Iberian Margin over the past 1.5 Ma Hodell, D.A. Chronostratigraphy and stable isotopes of Site U1385 (Shackleton site) on the Iberian Margin over the past 1.5 Ma 2016-02-08 NCDC-Paleoclimatology ONLINE Files Pending https://www.ncdc.noaa.gov/paleo/study/19782 Investigator D.A. Hodell earth science paleoclimate paleoceanography notes,null,null,null,null,paleoceanography,null,null,C,site hole earth science paleoclimate paleoceanography depth,null,null,meter,null,paleoceanography,composited,null,N,null earth science paleoclimate paleoceanography age,null,null,calendar kiloyear before present,null,paleoceanography,null,null,N,based on correlating oxygen isotope record to the reference stack of Lisiecki and Raymo (2005) earth science paleoclimate paleoceanography notes,null,null,null,null,paleoceanography,null,null,N,top offset in section earth science paleoclimate paleoceanography depth at sample end,null,null,meter,null,paleoceanography,composited,null,N,revised composited earth science paleoclimate paleoceanography age,null,null,calendar kiloyear before present,null,paleoceanography,null,null,N,based on the previously published Mediteranean-tuned age model of Hodell et al. 2015 earth science paleoclimate paleoceanography delta 18O,Globigerina bulloides,null,per mil PDB,null,paleoceanography,null,null,N,null earth science paleoclimate paleoceanography notes,null,null,null,null,paleoceanography,null,null,C,site code earth science paleoclimate paleoceanography depth at sample end,null,null,meter,null,paleoceanography,null,null,N,below surface earth science paleoclimate paleoceanography delta 18O,Cibicidoides wuellerstorfi,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 depth,null,null,meter,null,paleoceanography,composited,null,N,for splice earth science paleoclimate paleoceanography notes,null,null,null,null,paleoceanography,null,null,N,composite offset in study earth science paleoclimate paleoceanography delta 13C,Cibicidoides wuellerstorfi,null,per mil PDB,null,paleoceanography,null,null,N,null earth science paleoclimate paleoceanography notes,null,null,null,null,paleoceanography,null,null,C,core type earth science paleoclimate paleoceanography depth at sample end,null,null,meter,null,paleoceanography,composited,null,N,null earth science paleoclimate paleoceanography notes,null,null,null,null,paleoceanography,null,null,N,composite offset; difference shipboard to study earth science paleoclimate paleoceanography age,null,null,calendar kiloyear before present,null,paleoceanography,null,null,N,based on correlation of Site U1385 to Cores MD01-2444 and -2443 (Hodell et al. earth science paleoclimate paleoceanography notes,null,null,null,null,paleoceanography,null,null,C,core section earth science paleoclimate paleoceanography depth,null,null,meter,null,paleoceanography,composited,null,N,revised composited; for splice earth science paleoclimate paleoceanography notes,null,null,null,null,paleoceanography,null,null,C,splice note earth science paleoclimate paleoceanography notes,null,null,null,null,paleoceanography,null,null,N,bottom offset in section earth science paleoclimate paleoceanography depth at sample start,null,null,centimeter,null,paleoceanography,null,null,N,null earth science paleoclimate paleoceanography lightness,sediment,null,dimensionless,null,paleoceanography,null,null,N,CIELAB lightness earth science paleoclimate paleoceanography notes,null,null,null,null,paleoceanography,null,null,C,core ID earth science paleoclimate paleoceanography depth,null,null,meter,null,paleoceanography,composited,null,N,revised composited earth science paleoclimate paleoceanography depth,null,null,meter,null,paleoceanography,composited|corrected,null,N,null earth science paleoclimate paleoceanography sedimentation rate,null,null,centimeter per kiloyear,null,paleoceanography,null,null,N,null earth science paleoclimate paleoceanography calcium/titanium,sediment,null,dimensionless,null,paleoceanography,null,null,N,null earth science paleoclimate paleoceanography notes,null,null,null,null,paleoceanography,null,null,N,composite offset shipboard earth science paleoclimate paleoceanography age,null,null,calendar kiloyear before present,null,paleoceanography,null,null,N,based on correlating the log(Ca/Ti) to carbonate record of MD99-2334 (Skinner et al. earth science paleoclimate paleoceanography notes,null,null,null,null,paleoceanography,null,null,C,expedition ID earth science paleoclimate paleoceanography depth,null,null,meter,null,paleoceanography,null,null,N,below surface earth science paleoclimate paleoceanography age,null,null,calendar kiloyear before present,null,paleoceanography,null,null,N,based on tuning sediment lightness L* to orbital precession earth science paleoclimate paleoceanography depth at sample end,null,null,meter,null,paleoceanography,composited|corrected,null,N,null earth science paleoclimate paleoceanography depth at sample end,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 age control geoscientificInformation 1450000 cal yr BP 0 cal yr BP Complete 37.571417 37.571417 -10.126033 -10.126033 -2578 -2578 Ocean Atlantic Ocean North Atlantic Ocean IODP U1385>LATITUDE 37.571417>LONGITUDE -10.126033 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

325 Broadway, E/NE31

Boulder CO 80305-3328 USA online ASCII Hodell, D., L. Lourens, S. Crowhurst, T. Konijnendijk, R. Tjallingii, F. Jiménez-Espejo, L. Skinner, P.C. Tzedakis, and Shackleton Site Project Members 2015 Global and Planetary Change 133 49-64 10.1016/j.gloplacha.2015.07.002

We produced a composite depth scale and chronology for Site U1385 on the SW Iberian Margin. Using log(Ca/Ti) measured by core scanning XRF at 1-cm resolution in all holes, a composite section was constructed to 166.5 meter composite depth (mcd) that corrects for stretching and squeezing in each core. Oxygen isotopes of benthic foraminifera were correlated to a stacked d18O reference signal (LR04) to produce an oxygen isotope stratigraphy and age model. Variations in sediment color contain very strong precession signals at Site U1385, and the amplitude modulation of these cycles provides a powerful tool for developing an orbitally-tuned age model. We tuned the U1385 record by correlating peaks in L* to the local summer insolation maxima at 37°N. The benthic d18O record of Site U1385, when placed on the tuned age model, generally agrees with other time scales within their respective chronologic uncertainties. The age model is transferred to down-core data to produce a continuous time series of log(Ca/Ti) that reflect relative changes of biogenic carbonate and detrital sediment. Biogenic carbonate increases during interglacial and interstadial climate states and decreases during glacial and stadial periods. Much of the variance in the log(Ca/Ti) is explained by a linear combination of orbital frequencies (precession, tilt and eccentricity), whereas the residual signal reflects suborbital climate variability. The strong correlation between suborbital log(Ca/Ti) variability and Greenland temperature over the last glacial cycle at Site U1385 suggests that this signal can be used as a proxy for millennial-scale climate variability over the past 1.5 Ma. Millennial climate variability, as expressed by log(Ca/Ti) at Site U1385, was a persistent feature of glacial climates over the past 1.5 Ma, including glacial periods of the early Pleistocene (‘41-kyr world’) when boundary conditions differed significantly from those of the late Pleistocene (‘100-kyr world’). Suborbital variability was suppressed during interglacial stages and enhanced during glacial periods, especially when benthic d18O surpassed ~ 3.3–3.5‰. Each glacial inception was marked by appearance of strong millennial variability and each deglaciation was preceded by a terminal stadial event. Suborbital variability may be a symptomatic feature of glacial climate or, alternatively, may play a more active role in the inception and/or termination of glacial cycles. STUDY NOTES: Carbon isotope data to be added when published.

GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/hodell2015/hodell2015-u1385-affine.txt Formatted Text File; U1385 Affine Table GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/hodell2015/hodell2015-u1385-isotopes.txt Formatted Text File; U1385 Isotope Data GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/hodell2015/hodell2015-u1385-radio.txt Formatted Text File; U1385 Radiocarbon Age Model GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/hodell2015/hodell2015-u1385b.txt Formatted Text File; U1385B Data GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/hodell2015/hodell2015-u1385-tuned.txt Formatted Text File; U1385 Tuned Age Model GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/hodell2015/hodell2015-u1385a.txt Formatted Text File; U1385A Data GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/hodell2015/hodell2015-u1385-cati-spl.txt Formatted Text File; U1385 Ca/Ti Splice Data GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/hodell2015/hodell2015-u1385-splice.txt Formatted Text File; U1385 Splice Table GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/hodell2015/hodell2015-u1385-med.txt Formatted Text File; U1385 Mediterranean Tuned Age Model GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/hodell2015/hodell2015-u1385d.txt Formatted Text File; U1385D Data GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/hodell2015/hodell2015-u1385-light.txt Formatted Text File; U1385 L* Data GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/hodell2015/hodell2015-u1385e.txt Formatted Text File; U1385E Data GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/hodell2015/hodell2015-u1385-greensyn.txt Formatted Text File; U1385 Greenland Synthetic Age Model GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/hodell2015/hodell2015-u1385-lr04.txt Formatted Text File; U1385 LR04 Age Model USA/NOAA DIF Version 9.8.4 2018-12-11 2018-12-11