Physics
Scientific paper
Nov 2003
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003georl..30vasc3h&link_type=abstract
Geophysical Research Letters, Volume 30, Issue 22, pp. ASC 3-1, CiteID 2138, DOI 10.1029/2003GL018411
Physics
6
Atmospheric Composition And Structure: Constituent Sources And Sinks, Atmospheric Composition And Structure: Geochemical Cycles, Global Change: Atmosphere (0315, 0325)
Scientific paper
Pb has been measured in various sections of the 3,623-m Vostok deep Antarctic ice core dated from 65,000 to 240,000 years BP, i.e. back to the beginning of the penultimate ice age and the preceding interglacial (isotopic stage 7.5). Pb concentrations were highly variable during this time interval, with low values down to ~0.5 pg/g during warm climatic stages and much higher values up to ~20 pg/g during cold climatic stages, especially isotopic stages 4.2 and 6.2 to 6.6. Rock and soil dust accounts for virtually 100% of Pb measured in the ice during cold climatic stages, while the contribution from volcanoes might be significant during warm stages.
Barbante Carlo
Boutron Claude F.
Ferrari Christophe P.
Hong Sungmin
Kim Yeadong
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