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We present here the first reliable time series of Pb, Cu, Zn and Cd in Greenland ice for the last climatic cycle. They were obtained by analysing various sections of the 3028.8 m GRIP deep ice core drilled at Summit, central Greenland. Our results show that climatic changes have led to large variations in the concentrations of natural Pb, Cu, Zn and Cd in the high-latitude troposphere of the Northern...
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