noaa-ocean-15694 Atlantic and Pacific Ocean Benthic d13C Stacks Over the Last 800 ka Lisiecki, L.E. Atlantic and Pacific Ocean Benthic d13C Stacks Over the Last 800 ka 2013-12-12 NCDC-Paleoclimatology ONLINE Files Pending https://www.ncdc.noaa.gov/paleo/study/15694 Investigator L.E. Lisiecki earth science paleoclimate paleoceanography age,null,null,calendar kiloyear before present,null,paleoceanography,null,null,N,null earth science paleoclimate paleoceanography delta 13C,benthic foraminifer,null,per mil PDB,null,paleoceanography,null,null,N,null earth science paleoclimate paleocean carbon isotopes geoscientificInformation 800000 cal yr BP 0 cal yr BP Complete -42.9 61 -24 10 Ocean Atlantic Ocean South Atlantic Ocean Eastern South Atlantic>LATITUDE >LONGITUDE Ocean Atlantic Ocean North Atlantic Ocean Northeast Atlantic Ocean>LATITUDE >LONGITUDE Ocean Pacific Ocean Equatorial Pacific>LATITUDE >LONGITUDE 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 Lisiecki, L.E. 2010 Climate of the Past 6 305-314 10.5194/cp-6-305-2010

The fact that the deep-ocean benthic δ13C minimum shifted from the North Pacific to the South Atlantic during the Last Glacial Maximum is often interpretted as evidence of a change in deep water circulation, such as the development of deep water ventilation in the North Pacific or a decrease in Southern Ocean overturning. This study re-evaluates the implications of changes in benthic δ13C gradients by comparing Pacific Deep Water (PDW) δ13C measurements with the values expected for the null hypothesis that PDW ventilation sources remained unchanged throughout the Late Pleistocene. The δ13C compositions of PDW, Northern Component Water (NCW) and Southern Component Water (SCW) are estimated from regional benthic δ13C stacks of 3–6 sites. Changes in PDW δ13C and PDW-SCW δ13C gradients over the past 800 kyr are found to be well described by a constant mixture of 60% NCW and 40% SCW plus a constant Pacific remineralization offset of −0.5‰. Thus, a change in PDW ventilation cannot be inferred solely on the basis of changes in the Pacific-South Atlantic benthic δ13C gradient. STUDY NOTES: Changes in the d13C of Northern Component Water (NCW), Southern Component Water (SCW), and Pacific Deep Water (PDW) over the last 800 kyr are estimated by stacking (averaging) d13C records of Cibicidoides benthic foraminifera from each region. The stacks include all of the continuous records for each water mass spanning 0-800 ka with a temporal resolution of 5 kyr (see table). The age model for each d13C record is produced by aligning the cores benthic d18O record to the LR04 benthic 18O stack (Lisiecki and Raymo, 2005). List of cores used in the study: Stack, Core, Lat, Long, Depth(m), Reference (see paper for full citations) NCW, DSDP552, 56.0, -23.2, 2301, Shackleton and Hall (1984) NCW, ODP658, 20.8, -18.7, 2264, Tiedemann (1991) NCW, ODP980, 55.5, -14.7, 2169, Oppo et al. (1998); McManus et al. (1999); Flower et al. (2000) NCW, ODP982, 57.5, -15.9, 1145, Venz et al. (1999); Venz and Hodell (2002) NCW, ODP983, 60.4, -23.6, 1983, McIntyre et al. (1999); Raymo et al. (2004) NCW, ODP984, 61, -24, 1650, Raymo et al. (2004) SCW, ODP1089, -40.9, 9.9, 4621, Hodell et al. (2001) SCW, ODP1090, -42.9, 8.9, 3702, Venz and Hodell (2002) SCW, GeoB1211, -24.5, 7.5, 4085, Bickert and Wefer (1996) PDW, ODP677, 4.2, -83.7, 3461, Shackleton et al. (1990) PDW, ODP806B, 0.3, 159.4, 2520, Berger et al. (1996); Bickert et al. (1993) PDW, ODP846, -3.1, -90.8, 3307, Mix et al. (1995a); Shackleton et al. (1995) PDW, ODP849, 0.2, -110.5, 3851, Mix et al. (1995b)

GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/lisiecki2010-cp/lisiecki2010-cp-ncw.txt GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/lisiecki2010-cp/lisiecki2010-cp-scw.txt GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/lisiecki2010-cp/lisiecki2010-cp-pdw.txt USA/NOAA DIF Version 9.8.4 2018-12-11 2018-12-11