Present Antarctic aerosol composition: A memory of ice age atmospheric dust?

Present Antarctic aerosol composition: A memory of ice age atmospheric dust? 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. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Geophysical Research Letters Wiley

Present Antarctic aerosol composition: A memory of ice age atmospheric dust?

Geophysical Research Letters, Volume 21 (10) – May 15, 1994

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Publisher
Wiley
Copyright
Copyright © 1994 by the American Geophysical Union.
ISSN
0094-8276
eISSN
1944-8007
DOI
10.1029/94GL00706
Publisher site
See Article on Publisher Site

Abstract

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.

Journal

Geophysical Research LettersWiley

Published: May 15, 1994

References

  • Mineralogy of insoluble particles in the Vostok Antarctic ice core over the last climatic cycle (150 Kyr
    Gaudichet, Gaudichet; de Angelis, de Angelis; Lefevre, Lefevre; Petit, Petit; Korotkevitch, Korotkevitch; Petrov, Petrov
  • Considerations on the origin and properties of the Antarctic aerosol
    Shaw, Shaw

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