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Ammonium
5
Calcium
5
Chloride
5
Depth
5
Magnesium
5
Nitrate
5
Potassium
5
Sulfate
bottom/max
top/min
5
AGE
4
DRILL
4
Drilling/drill rig
4
GISP
4
GRIP/GISP/NGRIP
4
Greenland Ice Core Projects
4
Sampling/drilling ice
4
Sodium ion
4
ice/snow
4
maximum/old
4
minimum/young
4
GISP2-B
2
Chromatography
1
Comment
1
Fluoride
1
GISP2
1
GISP2-D
1
Greenland
1
Hydrogen peroxide
1
ICEDRILL
1
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