The data compiled here consist of GISP2 deuterium, deuterium excess, and oxygen isotope values measured at the Stable Isotope Laboratory, Institute of Arctic and Alpine Research (INSTAAR), University of Colorado as of August, 2004. The data are contained in two data files, with resolutions of 1.4 to 0.3 meters and 0.5 meters, respectively. The depth intervals of the measured data range from 91.49 to 1600.606 meters, and from 1600 to 3039 meters. The vast majority of data are from the ISO-1 piece, with some gaps filled using the main core archive. Data are in tab-delimited ASCII text format, and are available via NCAR.
White, J. 2004. GISP2 Stable Isotopes (Deuterium, Deuterium Excess, and Oxygen). Boulder, CO: National Center for Atmospheric Research, ARCSS Data Archive.
| Category | Description |
|---|---|
| Data format | Data are in tab-delimited ASCII text format. |
| Spatial coverage and resolution | Data were obtained from the Greenland Ice Sheet Project Two (GISP2) ice core (72° N, 38°W). The depth intervals of the measured data range from 91.49 to 1600.606 meters, and from 1600 to 3039 meters. The two data files have resolutions of 1.4 to 0.3 meters and 0.5 meters, respectively. |
| Temporal coverage and resolution | Ice cores were collected from August 1995 through September 2005, and isotope value measurements were completed as of August 2004. |
| File size | 60 - 80 KB |
| Parameter(s) | Ice sheets, ice core records, isotopes |
| Procedures for obtaining data | Data are available for ordering through NCAR. |
1. Contacts and Acknowledgments
2. Detailed Data Description
3. Data Access and Tools
4. Data Acquisition and Processing
5. References and Related Publications
6. Document Information
James White
INSTAAR, University of Colorado
Boulder, CO 80309
NCAR User Services
National Center for Atmospheric Research
PO Box 3000
Boulder, CO 80307-300 USA
e-mail: codiac@ucar.edu
The National Science Foundation (NSF) Geography and Regional Sciences and Arctic System Science (ARCSS) programs funded data collection. The following grants apply:
National Science Foundation Grant OPP 8821808: del D and Deuterium Excess Measurements on the GISPII Ice Core.
National Science Foundation Grant OPP 9321564: D and Deuterium Excess in the GISP2 Ice Core.
Data are in tab-delimited ASCII text format.
The data consist of two files, each with a different structure:
GISP2_Holocene_deuterium.txt
Column 1 is the top depth of each discrete sample, column 2 is the bottom depth of each discrete sample, column 3 is the discrete sample length, and column 4 is delta deuterium in per mil over the depth interval with measured precision of 0.5 per mil.
GISP2_glacial_Isotopes.txt
Column 1 is the top depth of each discrete sample, column 2 is the bottom depth of each discrete sample, column 3 is delta deuterium in per mil over the depth interval with measured precision of 0.1 per mil, column 4 is delta oxygen-18 in per mil with measured precision of 0.07 per mil, column 5 is deuterium excess calculated from columns 3 and 4.
File sizes range from 60 KB to 80 KB.
Data are obtained from analysis of the Greenland Ice Sheet Project Two (GISP2) ice core samples (72° N, 38°W). The data file "GISP2_Holocene_deuterium.tx" is in 1.4 to 0.3 meter resolution as indicated over the depth interval of 91.49 to 1600.606 meters. The data file "GISP2_glacial_isotopes.txt" is in 0.5 meter resolution over the depth interval of 1600 to 3039 meters.
The GISP2 ice cores were collected from August 1995 through September 1995, and isotope value measurements were completed as of August 2004. The paleotemporal coverage of GISP2_Holocene_deuterium.txt is from 240 calendar years B.P to 10,400 calendar years B.P. The paleotemporal coverage of GISP2_glacial_isotopes is from 10,400 calendar years B.P. to 111,000 calendar years B.P.
The parameters measured were top depth (m), bottom depth (m), and stable isotope values for deuterium, deuterium excess, and oxygen (per mil).
Data are available via FTP.
1.5 to 0.3 meter discrete samples were collected at the National Ice Core Lab in 1995 from the ISO-1 or MCA pieces of the GISP2-D ice core. Samples were further processed and measured via dual inlet mass spectrometry (VG-SIRA-II) at the Stable Isotope Lab, Institute of Alpine and Arctic Research, University of Colorado. The vast majority are samples from the ISO-1 piece, with some gaps filled in using the main core archive.
The depth intervals of the measured data range from 91.49 to 1600.606 meters (GISP2_Holocene_deuterium.txt), and from 1600 to 3039 meters (GISP2_glacial_Isotopes.txt).
November 2004
http://data.eol.ucar.edu/codiac/dss/id=106.ARCSS137