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Ammonium
5
Calcium
5
GISP
5
GRIP/GISP/NGRIP
5
Greenland Ice Core Projects
5
Magnesium
5
Nitrate
5
Potassium
Sampling/drilling ice
Sulfate
5
AGE
4
Chloride
4
DRILL
4
Depth
4
Drilling/drill rig
4
Sodium ion
4
bottom/max
4
ice/snow
4
maximum/old
4
minimum/young
4
top/min
4
GISP2-B
2
AERO
1
ALTITUDE
1
ATM
1
Aerological investigations
1
DATE/TIME
1
Date/time end
1
Date/time start
1
GISP2
1
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