Lake Tanganyika 60,000 Year TEX86 LST and dD Data Tierney, J.E.; Russell, J.M.; Huang, Y.; Sinninghe Damste, J.S.; Hopmans, E.C.; Cohen, A.S. Tierney, J.E. Russell, J.M. Huang, Y. Sinninghe Damste, J.S. Hopmans, E.C. Cohen, A.S. Air Temperature Reconstruction PAGES 2k Network PAGES Africa 2k earth science/paleoclimate/climate reconstructions|paleolimnology (lake surface temperature,glycerol dialkyl glycerol tetraether index,null,degree Celsius,null,climate reconstructions|paleolimnology,null,null,N,TEX86 method of Tierney (2010)) earth science/paleoclimate/paleolimnology (delta 2H,C28 n-alkanoic acid,null,per mil VSMOW,null,paleolimnology,corrected,null,N,corrected for biosynthetic fractionation and global ice volume) earth science/paleoclimate/paleolimnology (branched and isoprenoid tetraether index,sediment,null,dimensionless,null,paleolimnology,null,null,N,null) earth science/paleoclimate/climate reconstructions|paleolimnology (lake surface temperature,glycerol dialkyl glycerol tetraether index,null,degree Celsius,null,climate reconstructions|paleolimnology,null,null,N,TEX86 method of Powers (2005)) earth science/paleoclimate/paleolimnology (delta 13C,C28 n-alkanoic acid,null,per mil VPDB,null,paleolimnology,null,null,N,null) earth science/paleoclimate/paleolimnology (tetraether index of 86 carbon atoms,sediment,null,dimensionless,null,paleolimnology,null,null,N,null) earth science/paleoclimate/climate reconstructions|paleolimnology (age,null,null,calendar year before present,null,climate reconstructions|paleolimnology,null,null,N,null) earth science/paleoclimate/paleolimnology (delta 2H,C28 n-alkanoic acid,null,per mil VSMOW,null,paleolimnology,null,null,N,null) earth science/paleoclimate/climate reconstructions|paleolimnology (depth,null,null,centimeter,null,climate reconstructions|paleolimnology,null,null,N,null) earth science/paleoclimate/paleolimnology (delta 2H,C28 n-alkanoic acid,null,per mil VSMOW,null,paleolimnology,corrected,null,N,corrected for global ice volume) earth science/paleoclimate/paleolimnology (Lake Tanganyika Core NP04-KH3>LATITUDE -6.71378>LONGITUDE 29.832616) The processes that control climate in the tropics are poorly understood. We applied compound-specific hydrogen isotopes (dD) and the TEX86 (tetraether index of 86 carbon atoms) temperature proxy to sediment cores from Lake Tanganyika to independently reconstruct precipitation and temperature variations during the past 60,000 years. Tanganyika temperatures follow Northern Hemisphere insolation and indicate that warming in tropical southeast Africa during the last glacial termination began to increase ~3000 years before atmospheric carbon dioxide concentrations. dD data show that this region experienced abrupt changes in hydrology coeval with orbital and millennial-scale events recorded in Northern Hemisphere monsoonal climate records. This implies that precipitation in tropical southeast Africa is more strongly controlled by changes in Indian Ocean sea surface temperatures and the winter Indian monsoon than by migration of the Intertropical Convergence Zone. STUDY NOTES: This dataset includes TEX86 and compound-specific D/H data from Lake Tanganyika cores KH3 and KH4. The TEX86 temperature data are provided with both the original Powers et al. 2005 calibration and the new Tierney et al. (2010) calibration. Chronology was constrained by 26 radiocarbon dates on KH3 and 7 additional dates on KH4. The TEX86 data files include the TEX86 index value, calibration to temperature utilizing the lakes calibrations of Powers et al., 2005, and Tierney et al. 2010, and the Branched and Isoprenoid Tetraether (BIT) index value. The BIT index, ranging from 0-1, is an indicator of the relative amount of soil-derived vs. aquatic GDGTs, with a value of 0 indicative of completely aquatic sources, and 1 indicating completely soil-derived sources (Hopmans et al. 2004). The data for KH4 also includes the modified TEX temperatures (T +0.5º) to account for site offset. D/H values were measured on the C28 n-acid and are expressed in per mil vs. VSMOW. The carbon isotopes were also measured on the C-28 fatty acid expressed in per mil vs. VPDB. Two corrections have been applied to the dD data. "dDIVonly" refers to the D/H data corrected for global ice volume, and "dDIVandbio" refers to the D/H data corrected for biosynthetic fractionation and global ice volume. These corrections are described in the Tierney et al. QSR 2010 paper. Data from cores NP04-KH04-3A-1K (KH3) and NP04-KH04-4A-1K (KH4), Kalya Horst, Lake Tanganyika. Core (KH3): 6º42.827'S, 29º49.957'E, 773m elev, 644m depth. Core (KH4): 6º36.101'S, 30º00.696'E, 773m elev, 349m depth. NCDC-Paleoclimatology https://www.ncdc.noaa.gov/data-access/paleoclimatology-data - Bauer Bruce Investigator : Tierney, J.E. Investigator : Russell, J.M. Investigator : Huang, Y. Investigator : Sinninghe Damste, J.S. Investigator : Hopmans, E.C. Investigator : Cohen, A.S. 2008-12-01 ONLINE Files online, ASCII https://www.ncdc.noaa.gov/paleo/study/6206 https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/eastafrica/tanganyika2008.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/eastafrica/tanganyika2008.xls https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/eastafrica/tanganyika2008.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/eastafrica/tanganyika2008.xls English https://www.ncdc.noaa.gov/paleo/study/6206 https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/eastafrica/tanganyika2008.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/eastafrica/tanganyika2008.xls Tierney, J.E., J.M. Russell, Y. Huang, J.S. Sinninghe Damsté, E.C. Hopmans, and A.S. Cohen. 2008. Northern Hemisphere Controls on Tropical Southeast African Climate During the Past 60,000 Years. Science, Vol. 322, No. 5899, pp. 252-255, 10 October 2008. doi: 10.1126/science.1160485 START YEAR: 59450 cal yr BP * END YEAR: 1350 cal yr BP 29.832616 -6.71378 29.832616 -6.71378