| Summary: | In order to assess current global lead atmospheric pollution, it is necessary to reconstruct the natural, pre-human atmospheric fluxes of this toxic heavy metal. The time variations of these fluxes over the past 27,000 years have been obtained from the analysis of an Antarctic ice core. © 1986 Nature Publishing Group. Received 29 May; accepted 8 July 1986. We thank D. Settle for laboratory assistance and M. De Angelis and F. Batifol for selection of ice-core sections. This work was supported in the United States by NSF grant DPP-840-3490, and in France by the Centre National de la Recherche Scientifique, the Ministère de l'Environnement, the Expeditions Polaires Françaises and the Terres Australes et Antarctiques Françaises.
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