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Ammonium
2
Calcium
2
Chloride
2
Chromatography
2
Comment
Fluoride
2
Ice core
2
Ice drill
2
Ion concentrations
2
Laboratory
2
Lithium
2
Magnesium
2
Methanesulfonic acid
2
NGRIP
2
Nitrate
2
NorthGRIP ice core
2
Potassium
2
Sodium
2
Sulfate
2
impurities
2
Depth
1
Depth, bottom/max
1
Depth, top/min
1
Greenland
1
ICEDRILL
1
NGRIP1
1
North Greenland Ice Core Project
1
North Greenland Ice Core Project NGRIP
1
NorthGRIP
1
bottom/max
1
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