noaa-ocean-16016 Eastern Equatorial Pacific SST and Isotope Data During Heinrich Stadial 1 Kienast, S.S.; Friedrich, T.; Dubois, N.; Hill, P.S.; Timmermann, A.; Mix, A.C.; Kienast, M. Eastern Equatorial Pacific SST and Isotope Data During Heinrich Stadial 1 2014-02-04 NCDC-Paleoclimatology ONLINE Files Pending https://www.ncdc.noaa.gov/paleo/study/16016 Investigator S.S. Kienast Investigator T. Friedrich Investigator N. Dubois Investigator P.S. Hill Investigator A. Timmermann Investigator A.C. Mix Investigator M. Kienast earth science paleoclimate paleoceanography delta 18O,Cibicidoides sp.,null,per mil PDB,null,paleoceanography,null,null,N,>150um earth science paleoclimate paleoceanography delta 13C,Cibicidoides sp.,null,per mil PDB,null,paleoceanography,null,null,N,>150um earth science paleoclimate paleoceanography age,null,null,calendar kiloyear before present,null,paleoceanography,null,null,N,based on Koutavas and Sachs (2008) earth science paleoclimate paleoceanography notes,null,null,null,null,paleoceanography,null,null,C,null earth science paleoclimate paleoceanography age,null,null,calendar kiloyear before present,null,paleoceanography,null,null,N,null earth science paleoclimate paleoceanography 232Th,sediment,null,microgram per square meter per year,null,paleoceanography,null,null,N,null earth science paleoclimate paleoceanography delta 18O,Cibicidoides sp.,one standard deviation,per mil PDB,null,paleoceanography,null,null,N,>150um earth science paleoclimate paleoceanography 238U,sediment,null,disintegration per minute per gram,null,paleoceanography,null,null,N,for detrital minerals; estimated by multiplying 232Th (dpm/g)*0.7 earth science paleoclimate paleoceanography 238U,sediment,null,disintegration per minute per gram,null,paleoceanography,null,null,N,for authigenic minerals; estimated by 238U-238U detrital earth science paleoclimate paleoceanography 230Th,sediment,null,gram per square meter per year,null,paleoceanography,null,null,N,from Francois et al. 2004 earth science paleoclimate paleoceanography 230Th,sediment,null,disintegration per minute per gram,null,paleoceanography,null,null,N,null earth science paleoclimate paleoceanography delta 15N,sediment,null,per mil PDB,null,paleoceanography,corrected,null,N,-0.7 per mil for instrument drift earth science paleoclimate paleoceanography 230Th,sediment,unspecified margin of error,disintegration per minute per gram,null,paleoceanography,null,null,N,analytical uncertainty earth science paleoclimate paleoceanography 230Th excess,sediment,null,disintegration per minute per gram,null,paleoceanography,corrected,null,N,corrected for ingrowth of 230Th from detrital and authigenic U and decay since deposition earth science paleoclimate paleoceanography 232Th,sediment,null,disintegration per minute per gram,null,paleoceanography,null,null,N,null earth science paleoclimate paleoceanography delta 13C,Cibicidoides sp.,one standard deviation,per mil PDB,null,paleoceanography,null,null,N,>150um earth science paleoclimate paleoceanography depth,null,null,centimeter,null,paleoceanography,null,null,N,null earth science paleoclimate paleoceanography 238U,sediment,null,disintegration per minute per gram,null,paleoceanography,null,null,N,null earth science paleoclimate paleocean geochemistry earth science paleoclimate paleocean oxygen isotopes earth science paleoclimate paleocean carbon isotopes earth science paleoclimate paleocean nitrogen isotopes geoscientificInformation Heinrich Events Sea Surface Temperature Reconstruction 51470 cal yr BP 1760 cal yr BP Complete -3.62 .021667 -86.463 -83 -3210 -2941 Ocean Pacific Ocean South Pacific Ocean V19-30>LATITUDE -3>LONGITUDE -83 Ocean Pacific Ocean Eastern Pacific Ocean TR163-31P>LATITUDE -3.62>LONGITUDE -83.97 Ocean Pacific Ocean Eastern Pacific Ocean ME0005-24JC>LATITUDE .021667>LONGITUDE -86.463 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 Kienast, S.S., T. Friedrich, N. Dubois, P.S. Hill, A. Timmermann, A.C. Mix, and M. Kienast 2013 Paleoceanography 28 663-674 10.1002/2013PA002499 Koutavas, A., and J.P. Sachs 2008 Paleoceanography 23 PA4205 10.1029/2008PA001593 Kienast, S.S., M. Kienast, A.C. Mix, S.E. Calvert, and R. François 2007 Paleoceanography 22 PA2213 10.1029/2006PA001357 Dubois, N., M. Kienast, S. Kienast, C. Normandeau, S.E. Calvert, T.D. Herbert, and A. Mix. 2011. Millennial-scale variations in hydrography and biogeochemistry in the Eastern Equatorial Pacific over the last 100 kyr. Quaternary Science Reviews, Vol. 30, pp. 210-223. doi:10.1016/j.quascirev.2010.10.012 Martin, P A., D.W. Lea, Y. Rosenthal, N.J. Shackleton, M. Sarnthein, and T. Papenfuss 2002 Earth and Planetary Science Letters 198 193-209 10.1016/S0012-821X(02)00472-7 Francois, R., M. Frank, M.M.R. v. d. Loeff, and M.P. Bacon 2004 Paleoceanography 19 PA1018 10.1029/2003PA000939

In this study, we use records of nitrogen isotope ratios (d15N), UK'37 temperature estimates, organic carbon and opal percentages from high-resolution sediment cores located in the eastern equatorial Pacific (EEP) to explore the mechanisms linking millennial-scale changes in low-latitude sea surface temperature, water column denitrification and surface productivity to the timing of northern or southern polar climate during the last 100,000 yr. Our results support a hypothesis that the Southern Hemisphere, and its connection to the low latitudes via shallow subsurface ocean circulation, has a primary influence on the biogeochemistry of the EEP. In addition, our results suggest that, during the last glacial stage, denitrification rates fluctuated on millennial timescales in response to water-column ventilation rather than upstream oxidant demand in intermediate-depth waters. However, due to the poor age constraints available for Marine Isotopic Stage (MIS) 3, the EEP sedimentary data presented here could support two conflicting mechanisms, one driven by enhanced intermediate overturning circulation in the Southern Ocean during Heinrich Events/Antarctic Warm Events, implying that subsurface flow rates control thermocline ventilation, and a second one consistent with more sluggish intermediate circulation during Antarctic Warm Events and giving a central role to the temperature control on oxygen solubility in Southern Ocean surface waters. STUDY NOTES: Notes on Thorium measurements: 230Th xs,o refers to the measured value as corrected for ingrowth of 230Th from detrital and authigenic uranium. These values are calculated using the measured concentrations of 230Th, 232Th and 238U, and assuming that all 232Th is detrital in origin. It also assumes a detrital 238U/232Th ratio of 0.7. In nature, this ratio can be variable. Concentrations are corrected for decay since deposition. 230Th-norm flux refers to the 230Th-normalized bulk sediment mass accumulation rate (or flux). 232Th flux refers to the 230Th-normalized flux of Thorium-232. This flux is calculated as 230Th-norm flux * 232Th (micro g/g) Note that 232Th (micro g/g) = 232Th (dpm/g) * (1/246186) * 10^6 Please refer to Francois et al. (2004) for more detail on this proxy. Note that the 230Th xs,o data of cores ME0005-24JC and TR163-31P given here differ slightly from those originally published by Kienast et al. 2007 due a) the use of an updated age model here and b) a minor spread sheet error in the earlier publication. Neither update affects the conclusions reached in the earlier study in any way. For core V19-30, 230Th, 232Th, and 238U data can be found in Hayes et al. 2010.

GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/kienast2013/kienast2013-v19-30.txt Data File; V19-30 Nitrogen Isotopes GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/kienast2013/kienast2013-me24-cib.txt Data File; ME0005-24JC Cibicidoides GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/kienast2013/kienast2013-tr31-thor.txt Data File; TR163-31P Thorium Isotopes GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/kienast2013/kienast2013-me24-thor.txt Data File; ME0005-24JC Thorium Isotopes GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/kienast2013/EEP_kienast2013.xls Contributed Data File; Excel File - All Sites GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/kienast2013/kienast2013-me24-uvi.txt Data File; ME0005-24JC Uvigerina USA/NOAA DIF Version 9.8.4 2018-12-11 2018-12-11