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Ammonium
3
Calcium
3
Ice core
3
Ice drill
3
Ion concentrations
Magnesium
3
Potassium
3
Sodium
3
Chloride
2
Chromatography
2
Comment
2
Fluoride
2
Greenland
2
ICEDRILL
2
Laboratory
2
Lithium
2
Methanesulfonic acid
2
NGRIP
2
Nitrate
2
NorthGRIP ice core
2
Sulfate
2
impurities
2
Depth
1
Depth, bottom/max
1
Depth, top/min
1
EGRIP
1
East Greenland Ice-core Project
1
EastGRIP
1
Ion chromatography (Thermo Fisher ICS 5000+)
1
NGRIP1
1
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