It is unclear whether the modern processes of mercury cycling — such as mercury deposition in polar regions — operated before anthropogenic emissions. Ice-core records from Antarctica now reveal strikingly high mercury concentrations during the coldest glacial periods.
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CLAUDE BOUTRON
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Weller, R. Cool mercury. Nature Geosci 2, 462–463 (2009). https://doi.org/10.1038/ngeo560
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DOI: https://doi.org/10.1038/ngeo560
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