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