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

Abstract: This data set contains depth profiles for delta carbon-13 (δ13C) and delta deuterium (δD) of methane (CH4) 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 CH4 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).
Related URL
Description: Documentation

Description: FTP
Geographic Coverage
Spatial coordinates   
  N: 90.0   S: -90.0   E: 180.0   W: -180.0

Data Set Citation
Dataset Originator/Creator: Sowers, T. A.
Dataset Title: Methane Isotopes in South Pole Firn Air, 2008
Dataset Series Name: NSIDC-0502
Dataset Release Date: 2011-01-01
Dataset Release Place: Boulder, Colorado USA
Dataset Publisher: NSIDC: National Snow and Ice Data Center
Version: 1
Online Resource:
Temporal Coverage
Start Date: 2008-12-01
Stop Date: 2009-01-31
Location Keywords
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
Distribution Media: FTP
Distribution Size: 51 KB
Distribution Format: Microsoft Excel

Distribution Media: FTP
Distribution Size: 1 KB
Distribution Format: ASCII Text (.txt)
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.
Extended Metadata Properties
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Creation and Review Dates
DIF Creation Date: 2011-01-01
Last DIF Revision Date: 2017-08-23