Lake Albert, East Africa 7-14KYrBP TEX86 and Leaf Wax dD and d13C Data Berke, M.A.; Johnson, T.C.; Werne, J.P.; Livingstone, D.A.; Grice, K.; Schouten, S.; Sinninghe Damsté, J.S. Berke, M.A. Johnson, T.C. Werne, J.P. Livingstone, D.A. Grice, K. Schouten, S. Sinninghe Damsté, J.S. hydrology earth science/paleoclimate/paleolimnology (tetraether index of 86 carbon atoms,null,null,dimensionless,null,paleolimnology,null,null,N,null) earth science/paleoclimate/paleolimnology (delta 13C,n-alkanoic acid,null,per mil PDB,null,paleolimnology,averaged,null,N,C-29 + C-31 + C33 acids) earth science/paleoclimate/paleolimnology (branched and isoprenoid tetraether index,null,null,null,null,paleolimnology,null,null,N,null) earth science/paleoclimate/paleolimnology (sample identification,null,null,null,null,paleolimnology,null,null,C,null) earth science/paleoclimate/paleolimnology (delta 2H,C28 n-alkanoic acid,null,per mil VSMOW,null,paleolimnology,averaged,null,N,average of replicates) earth science/paleoclimate/paleolimnology (depth,null,null,meter,null,paleolimnology,null,null,N,null) earth science/paleoclimate/paleolimnology (delta 13C,n-alkanoic acid,unspecified margin of error,per mil PDB,null,paleolimnology,averaged,null,N,C-29 + C-31 + C33 acids) earth science/paleoclimate/paleolimnology (delta 2H,C28 n-alkanoic acid,null,per mil VSMOW,null,paleolimnology,averaged|corrected,null,N,average of replicates; corrected for ice volume) earth science/paleoclimate/paleolimnology (delta 2H,C28 n-alkanoic acid,unspecified margin of error,per mil VSMOW,null,paleolimnology,averaged,null,N,null) earth science/paleoclimate/paleolimnology (age,null,null,calendar year before present,null,paleolimnology,null,null,N,null) earth science/paleoclimate/paleolimnology (Lake Albert Core F>LATITUDE 1.835>LONGITUDE 31.17) New biomarker analyses from Lake Albert, East Africa spanning ~15-9 ka show the most extreme, abrupt, multi-stage climate and environmental shifts during the last deglacial transition of anywhere in Africa. Records of hydroclimate expressed in compound specific dD values from terrestrial leaf waxes and a TEX86 paleotemperature record support multiple stages of pronounced drying and cooling from 13.8 to 11.5 ka and demonstrate the dynamic behavior of the low latitude tropics during the deglaciation. The vegetation response, illustrated by compound specific d13C values and fossil pollen records, was an expansion of C4 grassland when the region was cool and arid. These results advance our understanding of a spatially and temporally complex regional response to global climate forcing, suggesting weakening of the Indian Ocean monsoon at the end of the Pleistocene that coincides with a minor decrease in the rate of the Atlantic Meridional Overturning Circulation (AMOC) and during a time of stepwise cooling in the northern high latitudes. STUDY NOTES: This dataset includes TEX86, dD of leaf wax n-alkanoic acids (C28 chain length), and d13C of n-alkane (weighted mean of the C29, C31, C33 chain lengths). TEX86 data includes TEX86 value and calibrated temperature (using Kim et al., 2010 as described in the text). This dataset also includes BIT Index determined. dD dataset includes the leaf wax n-alkanoic value (mean of multiple measurements, with standard deviation indicated). d13C n-alkane data was based on the weighted mean of the C29, C31, C33 chain lengths (most abudant long chain lengths). Standard deviation of replicates is shown. NCDC-Paleoclimatology https://www.ncdc.noaa.gov/data-access/paleoclimatology-data - Bauer Bruce Investigator : Berke, M.A. Investigator : Johnson, T.C. Investigator : Werne, J.P. Investigator : Livingstone, D.A. Investigator : Grice, K. Investigator : Schouten, S. Investigator : Sinninghe Damsté, J.S. 2014-06-18 ONLINE Files online, ASCII https://www.ncdc.noaa.gov/paleo/study/16677 https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/eastafrica/albert2014.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/eastafrica/albert2014.txt English https://www.ncdc.noaa.gov/paleo/study/16677 https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/eastafrica/albert2014.txt Melissa A. Berke, Thomas C. Johnson, Josef P. Werne, Daniel A. Livingstone, Kliti Grice, Stefan Schouten, Jaap S. Sinninghe Damsté 2014Characterization of the last deglacial transition in tropical East Africa: Insights from Lake AlbertPalaeogeography, Palaeoclimatology, Palaeoecology4091-810.1016/j.palaeo.2014.04.014http://www.sciencedirect.com/science/article/pii/S0031018214001977 START YEAR: 14334 cal yr BP * END YEAR: 7117 cal yr BP 31.17 1.835 31.17 1.835