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Calculated
Drilling/drill rig
Greenland Ice Core Projects GRIP/GISP/NGRIP
Sampling/drilling ice
6
AGE
5
DEPTH, ice/snow
5
GISP
5
Gas age
2
Acid concentration
1
Age
1
Age model
1
Age model, layer counting
1
Age, maximum/old
1
Age, minimum/young
1
Calculated from conductivity
1
Conductivity, electrical, ice
1
Depth, bottom/max
1
Depth, top/min
1
Duration, number of days
1
GRIP
1
Grain size, Elzone Particle Counter
1
Grain size, beta
1
Magnitude of eruption in amount of sulfuric acid
1
Methane
1
Particle concentration
1
Size
1
Sulfate
1
Sulfuric acid
1
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