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Lal, D (2001): GISP2 14-C (radiocarbon) measurements (Table 2). PANGAEA,

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Related to:
GRIP/GISP (1997): The Greenland Summit Ice Cores CD-ROM GISP2/GRIP. National Snow and Ice Data Center, University of Colorado at Boulder, and World Data Center for Paleoclimatology, National Geophysical Data Center, Boulder Colorado, CD-ROM, grip-gisp.iso
Lal, D; Jull, A J Timothy; Burr, George S; Donahue, Douglas J (1997): Measurements of in situ 14C concentrations in Greenland Ice Sheet Project 2 ice covering a 17-kyr time span: Implications to ice flow dynamics. Journal of Geophysical Research: Oceans, 102(C12), 26505-26510,
Greenland Ice Core Projects (GRIP/GISP/NGRIP)
Latitude: 72.970000 * Longitude: -38.800000
Date/Time Start: 1990-01-01T00:39:00 * Date/Time End: 1990-01-01T00:39:00
Minimum DEPTH, ice/snow: 88.0 m * Maximum DEPTH, ice/snow: 1837.4 m
GISP2 * Latitude: 72.970000 * Longitude: -38.800000 * Date/Time: 1990-01-01T00:39:00 * Elevation: 3208.0 m * Recovery: 3053 m * Campaign: GISP * Basis: Sampling/drilling ice * Method/Device: Drilling/drill rig (DRILL) * Comment: GISP2 is a combination of the shallow B and the deeper D core; about 200 ka
Expected in-situ 14C is based on 14C production rate at surface for the present altitude (3.2 km), 200 atoms 14C/g ice/y (Jull et al., 1994), and model ice accumulation rates estimated by Cutler et al. (1995). The estimates are in-situ cosmogenic 14C (i.e. excluding trapped 14C). For total - trapped CO2, the amount of trapped 14CO2 is estimated from the amount of air in the ice (tab1) and assuming 250 ppm CO2 in air.
#NameShort NameUnitPrincipal InvestigatorMethod/DeviceComment
1DEPTH, ice/snowDepth ice/snowmGeocode
2AGEAgeka BPGeocode
3Carbon-14 concentration14C concatoms/gLal, DGamma-ray spectrometrytotal, decay corrected
4Carbon-14 concentration14C concatoms/gLal, DGamma-ray spectrometryin-situ produced, decay corrected
5Carbon-14 concentration, standard deviation14C conc std dev±Lal, DGamma-ray spectrometry
6Carbon-14 concentration, standard deviation14C conc std dev±Lal, DGamma-ray spectrometry
7--Lal, Dtotal trapped CO2: thickness model for expected in-situ 14C
8--Lal, Dconstant variable: thickness model for expected in-situ 14C
60 data points

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