Physics
Scientific paper
Oct 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004georl..3120111h&link_type=abstract
Geophysical Research Letters, Volume 31, Issue 20, CiteID L20111
Physics
1
Atmospheric Composition And Structure: Geochemical Cycles, Atmospheric Composition And Structure: Constituent Sources And Sinks, Atmospheric Composition And Structure: Troposphere-Constituent Transport And Chemistry, Geochemistry: Trace Elements (3670)
Scientific paper
Improved ice core decontamination procedures have allowed us to obtain the first reliable data on Cu, Zn and Cd in ancient Antarctic ice drilled in a fluid filled hole at Vostok Station, dated back to the beginning of the next to last ice age ~240,000 years ago. Cu, Zn and Cd concentrations and fallout fluxes display very large natural variations by up to a factor of 35, with high values obtained during the coldest climatic stages and much lower values during warm climatic stages. Crustal dust was an important source of Cu and Zn during the coldest climatic stages, and volcanic emissions were probably an important source of Cd both during warm and cold periods.
Barbante Carlo
Boutron Claude F.
Ferrari Christophe P.
Gabrielli Paolo
Hong Sungmin
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