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Nature Geoscience 2, 244–245 (1 April 2009) | doi:10.1038/ngeo485

Palaeoclimate: Patagonian dust machine

Robert P. Ackert Jr

The dust record preserved in Antarctic ice cores is puzzling. The record shows abrupt shifts in dust flux, as if there was an on/off switch, rather than varying smoothly according to some clear relationship with other climate proxies.