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Variations of the Antarctic Circumpolar Current intensity during the past 500 ka ArchiMer
Mazaud, A.; Michel, Elisabeth; Dewilde, F.; Turon, J. L..
We examine the past variations of the Antarctic Circumpolar Current (ACC) by using variations in size and abundance of the magnetic grains deposited by this current at a site east the Kerguelen-Crozet plateau. Core MD00-2375G was taken at a midlatitude site during the ANTAUS cruise conducted in 2000 by the French R/V Marion Dufresne. Marine isotope stages (MIS) down to MIS 13 are identified, and an age model is derived from a correlation to the ice core isotopic record obtained from EPICA in Antarctica. Continuous records of abundance and size of the magnetic grains were obtained using environmental magnetism methods. Results show a strong modulation of the ACC flow intensity in response to glacial and interglacial cycles. The low abundance and the small...
Tipo: Text Palavras-chave: Antarctic; Current; Past; Cycles.
Ano: 2010 URL:
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