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Data Set ID:

Atmospheric CO2 Trapped in the Ice Core from Siple Dome, Antarctica, Version 1

These data are CO2 concentration of the air occulded in Siple Dome ice core, Antarctica. The study was conducted between January 2001 and March 2003 on a deep ice core from Siple Dome Core A, located at 81.66 S, 148.82 W. The data covers up to the Termination II (around 140,000 years ago). The parameters are depth in meters and carbon dioxide (CO2) concentration in part per million (ppm). The deepest depth (>995 m) show CO2 values of more than 390 ppm, suggesting reaction and mixing near the bottom with a till ice layer (>1001.8 m), and the intrusions of different ice flows that were laterally located near bed rock. Although deep CO2 values cannot be dated in any way, two of the deepest CO2 results (~ 200 ppm) indicate ages of early Termination II or the penultimate glacial period.

For each data point, four to six samples from the same depth interval were dry-extracted mechanically. Each sample has a volume of 4~6 cm3. CO2 concentration was measured with IR tunable diode laser spectroscopy, scanning a single vibrational-rotational absorption line.

Geographic Coverage

Data Set Tabs

Spatial Coverage:
  • N: -81.66, S: -81.66, E: -148.82, W: -148.82

Spatial Resolution:
Not Specified
Temporal Coverage
  • 1 January 2001 to 1 March 2003
Temporal Resolution:
Not specified
  • Ice Core Records > Carbon Dioxide
  • Ice Core Records
  • Snow/Ice
  • Snow/Ice > Snow/Ice Chemistry
Data Format(s):
  • ASCII Text (.txt)
Data Contributor(s): Jinho Ahn, Martin Wahlen, Bruce Deck

Data Citation

As a condition of using this data, you must cite the use of this data set using the following citation. For more information, see our Use and Copyright Web page.

Ahn, J., M. Wahlen, and B. Deck. 2003. Atmospheric CO2 Trapped in the Ice Core from Siple Dome, Antarctica, Version 1. [indicate subset used]. Boulder, Colorado USA. NSIDC: National Snow and Ice Data Center. [Date Accessed].

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