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Ammonium
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Chromatography
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Comment
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Fluoride
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Greenland
ICEDRILL
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Ice core
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Ice drill
Ion concentrations
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Laboratory
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Lithium
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Magnesium
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Methanesulfonic acid
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NGRIP
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NGRIP1
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Nitrate
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North Greenland Ice Core Project
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NorthGRIP
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NorthGRIP ice core
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Potassium
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Sodium
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Sulfate
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bottom/max
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impurities
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top/min
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