Methane Isotopes in South Pole Firn Air, 2008
Entry ID: NSIDC-0502

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Abstract: This data set contains depth profiles for delta carbon-13 (δ13C) and delta deuterium (δD) of methane (CH/4) in South Pole firn air. The investigators obtained air samples from two boreholes during December 2008 and January 2009, and subsequently determined isotope ratios at 18 depths. The profiles represent a roughly 100-year history of the isotopic composition of CH/4 at South Pole Station (no depth-age model provided). Data are available via FTP as an ASCII text file (.txt) and a Microsoft Excel file (.xlsx).
Geographic Coverage
Spatial coordinates   
  N: -90.0   S: -90.0   E: 180.0   W: -180.0
Min Depth: 0 M Max Depth: 117.57 M

Temporal Coverage
Start Date: 2008-12-01
Stop Date: 2009-01-31
Quality The investigator analyzed 156 firn air samples from the 2008-2009 field season and 44 standards for δ13C and δD of CH4. The average standard deviation of replicate samples at each of the 18 depths was ±0.13‰ and ±4.2‰ for δ13C and δD, respectively.
Data Set Progress
Originating Center
Data Center
National Snow and Ice Data Center Supplemental Info
Data Center URL:

Data Center Personnel
Phone: +1 (303) 492-6199
Fax: +1 (303) 492-2468
Email: nsidc at
Contact Address:
National Snow and Ice Data Center
University of Colorado
City: Boulder
Province or State: CO
Postal Code: 80309-0449
Country: USA
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Distribution Media: FTP
Distribution Size: 1 KB
Distribution Format: ASCII text

Distribution Media: FTP
Distribution Size: 51 KB
Distribution Format: Microsoft Excel
Phone: 814-863-8093
Fax: 814-863-8724
Email: todd.sowers5 at, sowers at
Contact Address:
237 Deike Building, Dept. of Geosciences
Penn State University
City: University Park
Province or State: Pennsylvania
Postal Code: 16802
Country: USA
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Battle, M. et al. 1996. Atmospheric Gas Concentrations over the Past Century Measured in Air from Firn at the South Pole. Nature 383, 231-235. Sowers, T., S. Bernard, O. Aballain, J. Chappellaz, J.M. Barnola, and T. Marik. 2005. Records of the delta 13C of atmospheric CH4 over the last 2 centuries as recorded in Antarctic snow and ice. Global Biogeochemical Cycles 19, doi:10.1029/2004GB002408.
Creation and Review Dates
DIF Creation Date: 2011-10-10
Last DIF Revision Date: 2012-05-15
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