noaa-lake-16618 Lake Victoria, East Africa 15KYr TEX86 and Leaf Wax dD and d13C Data Berke, M.A.; Johnson, T.C.; Werne, J.P.; Grice, K.; Schouten, S.; Sinninghe Damsté, J.S. Lake Victoria, East Africa 15KYr TEX86 and Leaf Wax dD and d13C Data 2014-06-18 NCDC-Paleoclimatology ONLINE Files Pending https://www.ncdc.noaa.gov/paleo/study/16618 Investigator M.A. Berke Investigator T.C. Johnson Investigator J.P. Werne Investigator K. Grice Investigator S. Schouten Investigator J.S. Sinninghe Damsté earth science paleoclimate climate reconstructions|paleolimnology C4 plants,delta 13C,one standard deviation lower bound,percent,null,climate reconstructions|paleolimnology,null,null,N,based on leaf wax isotopes earth science paleoclimate climate reconstructions|paleolimnology C4 plants,delta 13C,one standard deviation upper bound,percent,null,climate reconstructions|paleolimnology,null,null,N,based on leaf wax isotopes earth science paleoclimate paleolimnology branched and isoprenoid tetraether index,sediment,null,dimensionless,null,paleolimnology,null,null,N,null earth science paleoclimate paleolimnology delta 2H,C29 n-alkanoic acid,unspecified margin of error,per mil VSMOW,null,paleolimnology,averaged,null,N,mean error of replicates earth science paleoclimate paleolimnology tetraether index of 86 carbon atoms,sediment,null,dimensionless,null,paleolimnology,null,null,N,null earth science paleoclimate paleolimnology delta 2H,C28 n-alkanoic acid,unspecified margin of error,per mil VSMOW,null,paleolimnology,averaged,null,N,mean error of replicates earth science paleoclimate paleolimnology notes,null,null,null,null,paleolimnology,null,null,C,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,averaged,null,N,null earth science paleoclimate paleolimnology delta 2H,C29 n-alkanoic acid,null,per mil VSMOW,null,paleolimnology,averaged,null,N,null earth science paleoclimate climate reconstructions|paleolimnology depth,null,null,meter,null,climate reconstructions|paleolimnology,null,null,N,null earth science paleoclimate paleolimnology delta 2H,C28 n-alkanoic acid,null,per mil VSMOW,null,paleolimnology,averaged|corrected,null,N,corrected for ice volume earth science paleoclimate climate reconstructions|paleolimnology C4 plants,delta 13C,null,percent,null,climate reconstructions|paleolimnology,null,null,N,based on leaf wax isotopes earth science paleoclimate paleolimnology geochemistry geoscientificInformation hydrology 15176 cal yr BP 1372 cal yr BP Complete -1.2317 -1.2317 33.1983 33.1983 1133 1133 Continent Africa Eastern Africa Lake Victoria Lake Victoria Core V95-1P>LATITUDE -1.2317>LONGITUDE 33.1983 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

325 Broadway, E/NE31

Boulder CO 80305-3328 USA online ASCII Melissa A. Berke, Thomas C. Johnson, Josef P. Werne, Kliti Grice, Stefan Schouten, Jaap S. Sinninghe Damsté 2012 Quaternary Science Reviews 55 59-74 10.1016/j.quascirev.2012.08.014 http://www.sciencedirect.com/science/article/pii/S0277379112003216

New molecular proxies of temperature and hydrology are helping to constrain tropical climate change and elucidate possible forcing mechanisms during the Holocene. Here, we examine a ~14,000 year record of climate variability from Lake Victoria, East Africa, the world's second largest freshwater lake by surface area. We determined variations in local hydroclimate using compound specific dD of terrestrial leaf waxes, and compared these results to a new record of temperature utilizing the TEX86 paleotemperature proxy, based on aquatic Thaumarchaeotal membrane lipids. In order to assess the impact of changing climate on the terrestrial environment, we generated a record of compound specific d13C from terrestrial leaf waxes, a proxy for ecosystem-level C3/C4 plant abundances, and compared the results to previously published pollen-inferred regional vegetation shifts. We observe a general coherence between temperature and rainfall, with a warm, wet interval peaking ~10-9 ka and subsequent gradual cooling and drying over the remainder of the Holocene. These results, particularly those of rainfall, are in general agreement with other tropical African climate records, indicating a somewhat consistent view of climate over a wide region of tropical East Africa. The d13C record from Lake Victoria leaf waxes does not appear to reflect changes in regional climate or vegetation. However, palynological analyses document an abrupt shift from a Poaceae (grasses)-dominated ecosystem during the cooler, arid late Pleistocene to a Moraceae-dominated (trees/shrubs) landscape during the warm, wet early Holocene. We theorize that these proxies are reflecting vegetation in different locations around Lake Victoria. Our results suggest a predominantly insolation-forced climate, with warm, wet conditions peaking at the maximum interhemispheric seasonal insolation contrast, likely intensifying monsoonal precipitation, while maximum aridity coincides with the rainy season insolation and the interhemispheric contrast gradient minima. We interpret a shift in conditions at the Younger Dryas to indicate a limited switch in insolation-dominated control on climate of the Lake Victoria region, to remote teleconnections with the coupled Atlantic and Pacific climate system. STUDY NOTES: This dataset includes TEX86, dD of leaf wax n-alkanoic acids (C28 chain length), and d13C of n-alkane (C29 chain length). 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). Ice volume correction column described in text. d13C n-alkane data was based on C29 chain length (most abundant, best chromatography). Standard deviation of replicates shown, as well as estimated C4 plant percentage (and 1 standard deviation from this estimation) as described in text and shown in figures.

GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/eastafrica/victoria2012.xlsx Excel Data File; Lake Victoria TEX86 and Leaf Wax dD and d13C Data GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/eastafrica/victoria2012.txt Text Data File; Lake Victoria TEX86 and Leaf Wax dD and d13C Data USA/NOAA DIF Version 9.8.4 2018-12-11 2018-12-11