Physics
Scientific paper
Dec 1994
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994georl..21.2669r&link_type=abstract
Geophysical Research Letters (ISSN 0094-8276), vol. 21, no. 24, p. 2669-2672
Physics
12
Air Pollution, Antarctic Regions, Dust, Lead Isotopes, Pollution Transport, Snow, Abundance, Australia, Mass Spectroscopy, South America
Scientific paper
We report the first measurements of Pb isotopes in Antarctic snow, which show that even recent snow containing 2.3 pg/g is highly polluted with anthropogenic Pb. This follows from a comparison of isotope abundances of Pb in surface snow and terrestrial dust extracted from ancient Antarctic ice (Dome C, depth 308 m, approximate age 7,500 a BP), the latter being distinctly more radiogenic. This result is dependent of geochemical arguments based on measurements of Al, Na and SO4. South America is suggested as a likely source of this anthropogenic Pb. The presence of significantly less radiogenic Pb in the snow adjacent to two Antarctic base stations indicates that there is contamination from station emissions, although emission from Australia is an alternative explanation for a site 33 km from Dumont d'Urville.
Boutron Claude F.
Candelone Jean-Pierre
Chisholm W.
Patterson Claire
Rosman Kevin J. R.
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