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AGE
DEPTH
5
DRILL
5
Drilling/drill rig
GISP
5
GISP2
5
GRIP/GISP/NGRIP
5
Greenland Ice Core Projects
5
Sampling/drilling ice
5
ice/snow
5
δ18O
water
4
Isotope ratio mass spectrometry
2
Argon/Nitrogen ratio
1
Calcium
1
Carbon dioxide/Nitrogen ratio
1
Oxygen/Argon ratio
1
Oxygen/Nitrogen ratio
1
adjusted/corrected
1
error
1
gas
1
δ15N
1
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