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AGE
GRIP/GISP/NGRIP
Greenland Ice Core Projects
6
Sampling/drilling ice
6
ice/snow
6
Ammonium
5
Calcium
5
Chloride
5
Depth
5
Magnesium
5
Nitrate
5
Potassium
5
bottom/max
5
top/min
5
DRILL
4
Drilling/drill rig
4
GISP
4
Sodium ion
4
Sulfate
4
maximum/old
4
minimum/young
4
GISP2-B
2
GRIP
2
Greenland
2
ISTUK
2
ISTUK electromechanical drill
2
1997)
1
Acetate
1
Calcium cation
1
Calculated
1
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