Mathematics – Logic
Scientific paper
May 1994
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994georl..21..879d&link_type=abstract
Geophysical Research Letters, Volume 21, Issue 10, p. 879-882
Mathematics
Logic
12
Atmospheric Composition And Structure: Aerosols And Particles, Hydrology: Snow And Ice, Information Related To Geographic Region: Antarctica, Information Related To Geologic Time: Cenozoic
Scientific paper
The data obtained from the chemical analysis (Na, Al, and Ca concentrations) of deep Antarctic ice cores has been reexamined. The correlations found between the concentrations of these elements suggest that the Patagonian continental shelf was the dominant aerosol source during the last ice age, the dust being an intimate mixture of marine clay and carbonates. In addition, it is proposed that sea salt deposited on the continental shelf sediments during drop in sea level was emitted and transported jointly with this dust. The present Antarctic aerosol composition is very similar to the one deduced from ice core studies for glacial climatic conditions. It is concluded that present Antarctic aerosol originates mainly from ice age aeolian deposits in South American cold deserts.
Delmas R. J.
Petit Jean-Robert
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