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Age
15
DRILL
15
Drilling/drill rig
15
GISP
15
GISP2
15
Greenland
15
Holocene
Ice core
15
Sampling/drilling ice
15
accumulation rate
15
argon isotope
15
nitrogen isotope
15
summit
15
temperature reconstruction
15
Firn temperature gradient
14
Gas age
14
Ice age
14
Lock-in depth in ice equivalent
14
difference
14
modelled
14
δ15N
14
δ15N excess
14
δ40Ar/4
14
Accumulation rate in ice equivalent per year
1
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