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  • PANGAEA  (5)
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  • 1
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    Victoria Land Antarctica Pb and Ba concentrations and Pb isotope ratios 1872-1994 CE (2011)
    PANGAEA
    In:  Supplement to: Van de Velde, K; Vallelonga, Paul T; Candelone, Jean-Pierre; Rosman, K J R; Gaspari, Vania; Cozzi, Giulio; Barbante, Carlo; Udisti, Roberto; Cescon, Paolo; Boutron, Claude F (2005): Pb isotope record over one century in snow from Victoria Land, Antarctica. Earth and Planetary Science Letters, 232, 95-108, https://doi.org/10.1016/j.epsl.2005.01.007
    Details
    Publication Date: 2023-06-27
    Description: Pb and Ba concentrations and Pb isotopic compositions are reported for firn core and snow pit samples from Victoria Land, Antarctica, dating from 1872 AD to 1994 AD. From variations in Pb/Ba ratios and Pb isotopic compositions, two periods of major Pb enhancements were identified, from 1891 to 1908 AD and from 1948 to 1994 AD. The earlier pollution event is attributed to Pb emissions from non-ferrous metal production and coal combustion in the Southern Hemisphere and is in excellent agreement with coincident pollution inputs reported in firn/ice cores from two other regions of Antarctica, at Coats Land and Law Dome. Using Pb isotopic systematics, it was calculated that ~50% of Pb deposited in Victoria Land in 1897 originated from anthropogenic emission sources. The more recent period of Pb enhancements, from 1948 to 1994 AD, corresponds to the introduction and widespread use of gasoline alkyl Pb additives in automobiles in the Southern Hemisphere, with anthropogenic Pb inputs averaging 60% of total Pb but with large uncertainty. Intra- and inter-annual variations in Pb concentrations and isotopic compositions were evaluated in snow pits samples corresponding to the period 1991-1994. Substantial variations in Pb/ Ba and 206Pb/207Pb ratios were detected but the absence of a regular seasonal pattern for these parameters suggests that the transport and deposition of aerosols to the Antarctic ice sheet are complex and vary from year to year.
    Keywords: Electromechanical drill, dry hole; EMD-D; Hercules_Neve; Hercules Neve, Victoria Land, Antarctica; SNOWPIT; Snow pit; Styx; Styx Glacier, Victoria Land, Antarctica
    Type: Dataset
    Format: application/zip, 2 datasets
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    DATA PANGAEA
  • 2
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    Table 1. Lead and Ba concentrations and Pb isotopic compositions measured in firn core samples from Styx glacier in Victoria Land, Antarctica (2011)
    PANGAEA
    Details
    Publication Date: 2023-06-27
    Keywords: Age; AGE; Barium; DEPTH, ice/snow; Electromechanical drill, dry hole; EMD-D; Lead; Lead/Barium ratio; Lead-206/Lead-204 ratio; Lead-206/Lead-204 ratio, error; Lead-206/Lead-207, error; Lead-206/Lead-207 ratio; Lead-208/Lead-207, error; Lead-208/Lead-207 ratio; Sample code/label; Styx; Styx Glacier, Victoria Land, Antarctica
    Type: Dataset
    Format: text/tab-separated-values, 308 data points
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    DATA PANGAEA
  • 3
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    Table 2. Lead and Ba concentrations and Pb isotopic compositions measured in snow pit samples from Hercules Névé in Victoria Land, Antarctica (2011)
    PANGAEA
    Details
    Publication Date: 2023-06-27
    Keywords: Age; AGE; Barium; DEPTH, ice/snow; Hercules_Neve; Hercules Neve, Victoria Land, Antarctica; Lead; Lead/Barium ratio; Lead-206/Lead-204 ratio; Lead-206/Lead-204 ratio, error; Lead-206/Lead-207, error; Lead-206/Lead-207 ratio; Lead-208/Lead-207, error; Lead-208/Lead-207 ratio; SNOWPIT; Snow pit
    Type: Dataset
    Format: text/tab-separated-values, 380 data points
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  • 4
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    Table 2. Lead and Ba concentrations and Pb isotopic compositions measured in Law Dome ice cores (2011)
    PANGAEA
    In:  Supplement to: Vallelonga, Paul T; Van de Velde, K; Candelone, Jean-Pierre; Morgan, V I; Boutron, Claude F; Rosman, K J R (2002): The lead pollution history of Law Dome, Antarctica, from isotopic measurements on ice cores: 1500 AD to 1989 AD. Earth and Planetary Science Letters, 204, 291-306, https://doi.org/10.1016/S0012-821X(02)00983-4
    Details
    Publication Date: 2023-06-27
    Description: Lead isotopic compositions and Pb and Ba concentrations have been measured in ice cores from Law Dome, East Antarctica, covering the past 6500 years. 'Natural' background concentrations of Pb (ab. 0.4 pg/g) and Ba (ab. 1.3 pg/g) are observed until 1884 AD, after which increased Pb concentrations and lowered 206Pb/207Pb ratios indicate the influence of anthropogenic Pb. The isotopic composition of 'natural' Pb varies within the range 206Pb/207Pb=1.20-1.25 and 208Pb/207Pb=2.46-2.50, with an average rock and soil dust Pb contribution of 8-12%. A major pollution event is observed at Law Dome between 1884 and 1908 AD, elevating the Pb concentration four-fold and changing 206Pb/207Pb ratios in the ice to ab. 1.12. Based on Pb isotopic systematics and Pb emission statistics, this is attributed to Pb mined at Broken Hill and smelted at Broken Hill and Port Pirie, Australia. Anthropogenic Pb inputs are at their greatest from 1900 to 1910 and from ab. 1960 to ab. 1980. During the 20th century, Ba concentrations are consistently higher than 'natural' levels and are attributed to increased dust production, suggesting the influence of climate change and/or changes in land coverage with vegetation.
    Keywords: Age; AGE; Barium; BHD; DomeSummitSouth; DSS; DSS99; DSS-W20k; DSS-W2k; Electromechanical drill, dry hole; Electromechanical drill, fluid-filled hole; EMD-D; EMD-F; Hand ice drill; HID; Law Dome, Wilkes Land, Antarctica; Lead; Lead/Barium ratio; Lead-206/Lead-204 ratio; Lead-206/Lead-204 ratio, error; Lead-206/Lead-207, error; Lead-206/Lead-207 ratio; Lead-208/Lead-207, error; Lead-208/Lead-207 ratio; Sample code/label; Thermal drill, dry hole; THERM-D
    Type: Dataset
    Format: text/tab-separated-values, 363 data points
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    DATA PANGAEA
  • 5
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    Pb and Ba concentrations and Pb isotope ratios in EPICA Dome C ice 2-217 ky BP (2011)
    PANGAEA
    In:  Supplement to: Vallelonga, Paul T; Gabrielli, Paolo; Balliana, E; Wegner, Anna; Delmonte, Barbara; Turetta, Clara; Burton, G; Vanhaecke, Frank; Rosman, K J R; Hong, Sungmin; Boutron, Claude F; Cescon, Paolo; Barbante, Carlo (2010): Lead isotopic compositions in the EPICA Dome C ice core and southern hemisphere potential source areas. Quaternary Science Reviews, 29(1-2), 247-255, https://doi.org/10.1016/j.quascirev.2009.06.019
    Details
    Publication Date: 2024-03-16
    Description: 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.
    Keywords: AGE; Barium; DEPTH, ice/snow; Dome C; Dome C, Antarctica; EDC; EPICA; EPICA Dome C; European Project for Ice Coring in Antarctica; ICEDRILL; Ice drill; Lead; Lead/Barium ratio; Lead-206/Lead-204 ratio; Lead-206/Lead-204 ratio, error; Lead-206/Lead-207 ratio; Lead-208/Lead-207, error; Lead-208/Lead-207 ratio
    Type: Dataset
    Format: text/tab-separated-values, 666 data points
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    DATA PANGAEA
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