EPICA Dome C 217KYr Lead Isotope and Barium Data Vallelonga, P.; Gabrielli, P.; Balliana, E.; Wegner, A.; Delmonte, B.; Turetta, C.; Burton, G.; Vanhaecke, F.; Rosman, K.J.R.; Hong, S.; Boutron, C.F.; Cescon, P.; Barbante, C. Vallelonga, P. Gabrielli, P. Balliana, E. Wegner, A. Delmonte, B. Turetta, C. Burton, G. Vanhaecke, F. Rosman, K.J.R. Hong, S. Boutron, C.F. Cescon, P. Barbante, C. earth science/paleoclimate/ice cores (206Pb/207Pb,bulk ice,95% confidence interval margin of error,dimensionless,null,ice cores,null,null,N,null) earth science/paleoclimate/ice cores (ice age,null,null,calendar kiloyear before present,null,ice cores,null,null,N,null) earth science/paleoclimate/ice cores (lead,bulk ice,null,picogram per gram,null,ice cores,null,null,N,null) earth science/paleoclimate/ice cores (206Pb/204Pb,bulk ice,95% confidence interval margin of error,dimensionless,null,ice cores,null,null,N,null) earth science/paleoclimate/ice cores (barium,bulk ice,null,picogram per gram,null,ice cores,null,null,N,null) earth science/paleoclimate/ice cores (208Pb/207Pb,bulk ice,null,dimensionless,null,ice cores,null,null,N,null) earth science/paleoclimate/ice cores (208Pb/207Pb,bulk ice,95% confidence interval margin of error,dimensionless,null,ice cores,null,null,N,null) earth science/paleoclimate/ice cores (206Pb/204Pb,bulk ice,null,dimensionless,null,ice cores,null,null,N,null) earth science/paleoclimate/ice cores (lead/barium,bulk ice,null,dimensionless,null,ice cores,null,null,N,null) earth science/paleoclimate/ice cores (depth,null,null,meter,null,ice cores,null,null,N,null) earth science/paleoclimate/ice cores (206Pb/207Pb,bulk ice,null,dimensionless,null,ice cores,null,null,N,null) earth science/paleoclimate/ice cores (delta 2H,bulk ice,null,per mil SMOW,null,ice cores,null,null,N,null) earth science/paleoclimate/ice core (EPICA Dome C>LATITUDE -75.1>LONGITUDE 123.4) A record of Pb isotopic compositions and Pb and Ba concentrations are presented for the EPICA Dome C ice core covering the past 220 ky, indicating the characteristics of dust and volcanic Pb deposition in central East Antarctica. Lead isotopic compositions are also reported in a suite of soil and loess samples from the Southern Hemisphere (Australia, Southern Africa, Southern South America, New Zealand, Antarctica) in order to evaluate the provenance of dust present in Antarctic ice. Lead isotopic compositions in Dome C ice support the contention that Southern South America was an important source of dust in Antarctica during the last two glacial maxima, and furthermore suggest occasional dust contributions from local Antarctic sources. The isotopic signature of Pb in Antarctic ice is altered by the presence of volcanic Pb, inhibiting the evaluation of glacial-interglacial changes in dust sources and the evaluation of Australia as a source of dust to Antarctica. Consequently, an accurate evaluation of the predominant source(s) of Antarctic dust can only be obtained from glacial maxima, when dust-Pb concentrations were greatest. These data confirm that volcanic Pb is present throughout Antarctica and is emitted in a physical phase that is free from Ba, while dust Pb is transported within a matrix containing Ba and other crustal elements. STUDY NOTES: EPICA Dome C, Antarctica ice core Pb and Ba concentrations, and Pb isotope ratios, for the period 217 - 2 KYrBP. Sample ages calculated according to EDC3 chronology reported by Parrenin et al. Climate of the Past Discussions, 2007, 3(2), pp.575-606. dD values from Jouzel et al. Science, 2007, v.317, pp.793-796. NCDC-Paleoclimatology https://www.ncdc.noaa.gov/data-access/paleoclimatology-data - Bauer Bruce Investigator : Vallelonga, P. Investigator : Gabrielli, P. Investigator : Balliana, E. Investigator : Wegner, A. Investigator : Delmonte, B. Investigator : Turetta, C. Investigator : Burton, G. Investigator : Vanhaecke, F. Investigator : Rosman, K.J.R. Investigator : Hong, S. Investigator : Boutron, C.F. Investigator : Cescon, P. Investigator : Barbante, C. 2011-08-31 ONLINE Files online, ASCII https://www.ncdc.noaa.gov/paleo/study/11930 https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/epica_domec/edc2010pb-ba.xls https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/epica_domec/edc2010pb-ba.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/epica_domec/edc2010pb-ba.xls https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/epica_domec/edc2010pb-ba.txt English https://www.ncdc.noaa.gov/paleo/study/11930 https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/epica_domec/edc2010pb-ba.xls https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/epica_domec/edc2010pb-ba.txt Vallelonga, P., P. Gabrielli, E. Balliana, A. Wegner, B. Delmonte, C. Turetta, G. Burton, F. Vanhaecke, K.J.R. Rosman, S. Hong, C.F. Boutron, P. Cescon, and C. Barbante. 2010. Lead isotopic compositions in the EPICA Dome C ice core and Southern Hemisphere Potential Source Areas. Quaternary Science Reviews, Vol. 29, Issues 1-2, pp. 247-255, January 2010. doi:10.1016/j.quascirev.2009.06.019 (EPICA publication no. 226) START YEAR: 217050 cal yr BP * END YEAR: 2010 cal yr BP 123.4 -75.1 123.4 -75.1