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Climate‐related variations in lead concentrations and sources in Vostok Antarctic ice from 65,000 to 240,000 years BP
Author(s) -
Hong Sungmin,
Kim Yeadong,
Boutron Claude F.,
Ferrari Christophe P.,
Petit Jean Robert,
Barbante Carlo,
Rosman Kevin,
Lipenkov Vladimir Y.
Publication year - 2003
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/2003gl018411
Subject(s) - ice core , interglacial , geology , lead (geology) , climatology , physical geography , atmospheric sciences , oceanography , quaternary , geomorphology , paleontology , geography
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.