Lal, D (2001): GISP2 14-C (radiocarbon) measurements (Table 2) [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.60022
Always quote citation above when using data! You can download the citation in several formats below.
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, https://doi.org/10.1029/96JC02224
Project(s):
Greenland Ice Core Projects (GRIP/GISP/NGRIP)
Coverage:
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
Event(s):
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
Comment:
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.
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | DEPTH, ice/snow | Depth ice/snow | m | Geocode | ||
| 2 | AGE | Age | ka BP | Geocode | ||
| 3 | Carbon-14 concentration | 14C conc | atoms/g | Lal, D | Gamma-ray spectrometry | total, decay corrected |
| 4 | Carbon-14 concentration | 14C conc | atoms/g | Lal, D | Gamma-ray spectrometry | in-situ produced, decay corrected |
| 5 | Carbon-14 concentration, standard deviation | 14C conc std dev | ± | Lal, D | Gamma-ray spectrometry | |
| 6 | Carbon-14 concentration, standard deviation | 14C conc std dev | ± | Lal, D | Gamma-ray spectrometry | |
| 7 | - | - | Lal, D | total trapped CO2: thickness model for expected in-situ 14C | ||
| 8 | - | - | Lal, D | constant variable: thickness model for expected in-situ 14C |
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
60 data points
Data
| 1 Depth ice/snow [m] | 2 Age [ka BP] | 3 14C conc [atoms/g] (total, decay corrected) | 4 14C conc [atoms/g] (in-situ produced, decay corre...) | 5 14C conc std dev [±] | 6 14C conc std dev [±] | 7 - (total trapped CO2: thickness ...) | 8 - (constant variable: thickness ...) |
|---|---|---|---|---|---|---|---|
| 88.0 | 0.22500 | 1440 | 910 | 90 | 90 | 1370.000 | 1380.000 |
| 100.7 | 0.27500 | 1190 | 670 | 80 | 90 | 1370.000 | 1380.000 |
| 101.1 | 0.27500 | 2190 | 1370 | 90 | 100 | 1370.000 | 1380.000 |
| 125.8 | 0.37500 | 2070 | 1460 | 80 | 90 | 1370.000 | 1380.000 |
| 126.2 | 0.37500 | 1960 | 1350 | 100 | 120 | 1370.000 | 1380.000 |
| 1518.5 | 9.47000 | 5720 | 5130 | 250 | 270 | 1540.000 | 1700.000 |
| 1623.4 | 10.77000 | 3480 | 2870 | 270 | 300 | 1820.000 | 2110.000 |
| 1698.5 | 12.39000 | 3580 | 2960 | 350 | 400 | 4380.000 | 5230.000 |
| 1749.4 | 13.75000 | 4180 | 3510 | 450 | 500 | 2330.000 | 2810.000 |
| 1837.4 | 16.20000 | 6295 | 5660 | 650 | 600 | 3965.000 | 4985.000 |