noaa-ocean-22544 Gulf of Aden 200,000 Year Stable Isotope and Alkenone SST Data Tierney, J.E.; deMenocal, P.B.; Zander, P.D. Gulf of Aden 200,000 Year Stable Isotope and Alkenone SST Data 2017-10-03 NCDC-Paleoclimatology ONLINE Files Pending https://www.ncdc.noaa.gov/paleo/study/22544 Investigator J.E. Tierney Investigator P.B. deMenocal Investigator P.D. Zander earth science paleoclimate paleoceanography delta 13C,Globigerinoides ruber white,null,per mil VPDB,null,paleoceanography,null,isotope ratio mass spectrometry,N,sensu stricto 250-350 um earth science paleoclimate paleoceanography delta 18O,benthic foraminifer,null,per mil VPDB,null,paleoceanography,null,isotope ratio mass spectrometry,N,Uvigerina spp. sensu stricto 250-350 um earth science paleoclimate paleoceanography delta 2H,C30 n-alkanoic acid,null,per mil VSMOW,null,paleoceanography,null,isotope ratio mass spectrometry,N,higher plant leaf waxes earth science paleoclimate paleoceanography delta 13C,benthic foraminifer,null,per mil VPDB,null,paleoceanography,null,isotope ratio mass spectrometry,N,Uvigerina spp. sensu stricto 250-350 um earth science paleoclimate paleoceanography delta 13C,C30 n-alkanoic acid,null,per mil VPDB,null,paleoceanography,null,isotope ratio mass spectrometry,N,higher plant leaf waxes earth science paleoclimate climate reconstructions|paleoceanography depth,null,null,centimeter,null,climate reconstructions|paleoceanography,null,null,N,midpoint earth science paleoclimate climate reconstructions|paleoceanography sea surface temperature,alkenone unsaturation index,null,degree Celsius,null,climate reconstructions|paleoceanography,null,null,N,Sonzogni et al. 1997 calibration: UK'37 = 0.023*SST + .316 earth science paleoclimate paleoceanography delta 2H,C30 n-alkanoic acid,null,per mil VSMOW,null,paleoceanography,null,isotope ratio mass spectrometry,N,higher plant leaf waxes-ice volume corrected earth science paleoclimate paleoceanography delta 18O,Globigerinoides ruber white,null,per mil VPDB,null,paleoceanography,null,isotope ratio mass spectrometry,N,sensu stricto 250-350 um earth science paleoclimate paleoceanography alkenone unsaturation index Uk37 prime,null,null,dimensionless,null,paleoceanography,null,null,N,null earth science paleoclimate climate reconstructions|paleoceanography age,null,null,calendar year before present,null,climate reconstructions|paleoceanography,null,null,N,null earth science paleoclimate paleocean biomarkers earth science paleoclimate paleocean oxygen isotopes earth science paleoclimate paleocean carbon isotopes earth science paleoclimate paleocean reconstruction geoscientificInformation Sea Surface Temperature Reconstruction 212041 cal yr BP 1884 cal yr BP Complete 12.15 12.15 44.4 44.4 -738 -738 Ocean Indian Ocean Arabian Sea RC09-166>LATITUDE 12.15>LONGITUDE 44.4 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 Jessica E. Tierney, Peter B. deMenocal, Paul D. Zander 2017 Geology .1130/G39457.1 https://pubs.geoscienceworld.org/geology/article/516677/a-climatic-context-for-the-out-of-africa-migration

Around 200,000 yr ago, Homo sapiens emerged in Africa. By 40 ka, Homo sapiens had spread throughout Eurasia, and a major competing species, the Neanderthals, became extinct. The factors that drove our species "out of Africa" remain a topic of vigorous debate. Existing research invokes climate change as either providing opportunities or imposing limits on human migration. Yet the paleoclimate history of northeast Africa, the gateway to migration, is unknown. Here, we reconstruct temperature and aridity in the Horn of Africa region spanning the past 200,000 yr. Our data suggest that warm and wet conditions from 120,000 to 90,000 yr ago could have facilitated early waves of human migration toward the Levant and Arabia, as supported by fossil and lithic evidence. However, the primary out-of-Africa event, as constrained by genetic studies (ca. 65-55 ka), occurred during a cold and dry time. This complicates the climate-migration relationship, suggesting that both "push" and "pull" factors may have prompted Homo sapiens to colonize Eurasia. STUDY NOTES: Stable isotope (dD, d18O, d13C) data and alkenone SST from sediments collected in Gulf of Aden sediment core RC09-166 for the past 200,000 years.

GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/tierney2017b/tierney2017b.txt Formatted Text Data File; Gulf of Aden Stable Isotope and Alkenone SST Data USA/NOAA DIF Version 9.8.4 2018-12-11 2018-12-11