6 A and B, the range of the fluctuation margin in the DFe/TDFe ratios in the NEEM ice core during 1870–1969 is 1.7%–64%, with an average of 12%, and there is an increasing trend during 1945–1967 (2.4%–64%, mean 17%).
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Iron in the NEEM ice core relative to Asian loess records over the last glacial-interglacial cycle.
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