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Methane Isotopes in South Pole Firn Air, 2008

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Entry ID

NSIDC-0502

Summary

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).

Geographic Coverage

Spatial Coordinates:
Min Depth: 0 meters     Max Depth: 117.57 meters

Data Set Citation

Dataset Creator: Sowers, T
Dataset Title: Methane Isotopes in South Pole Firn Air, 2008
Dataset Release Date: 2011-01-01
Dataset Release Place: Boulder, Colorado USA
Dataset Publisher: NSIDC: National Snow and Ice Data Center
Online Resource: http://nsidc.org/data/nsidc-0502.html
Dataset DOI: http://dx.doi.org/10.7265/N55T3HFP

Temporal Coverage

Start Date: 2008-12-01
Stop Date: 2009-01-31

Paleo Temporal Coverage

Paleo Start Date: 1900
Paleo Stop Date: 2009

Location Keywords

  • CONTINENT ANTARCTICA SOUTH POLE

Science Keywords

  • Cryosphere Snow/Ice Snow Depth Meters Below Surface
  • Paleoclimate Ice Core Records Isotopes Delta Carbon-13 of Methane
  • Paleoclimate Ice Core Records Isotopes Delta Deuterium of Methane

Ancillary Keywords

  • AGDC
  • Antarctica
  • Carbon
  • CARBON-13
  • CARBON ISOTOPES
  • delta 13C
  • deltaD
  • delta deuterium
  • Deuterium
  • Firn
  • firn air
  • firn air chemistry
  • Firn Air Isotope Measurements
  • Firn Air Isotopes
  • firn air samples
  • Gas Isotopes
  • ISOTOPES
  • Methane
  • methane isotopes
  • Polar Firn Air
  • Stable Isotopes

ISO Topic Category (View Definitions)

  • Climatology/Meteorology/Atmosphere

Platform

  • GROUND-BASED OBSERVATIONS
  • LABORATORY

Instrument

  • MASS SPECTROMETERS

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

complete

Originating Center

AGDC

Data Center

National Snow and Ice Data Center
Data Center URL: http://nsidc.org

Data Center Personnel

Name: NSIDC User Services
Phone: 1 303 492-6199
Fax: 1 303 492-2468
Email: nsidc@nsidc.org
Contact Address:

  • National Snow and Ice Data Center
  • CIRES, 449 UCB
  • University of Colorado

City: Boulder
Province or State: CO
Postal Code: 80309-0449
Country: USA

Antarctic Glaciological Data Center
Data Center URL: http://nsidc.org/agdc/

Data Center Personnel

Name: AGDC User Services
Phone: 1 303 492-6199 x
Fax: 1 303 492-2468 x
Email: nsidc@nsidc.org
Contact Address:

  • National Snow and Ice Data Center
  • CIRES, 449 UCB
  • University of Colorado

City: Boulder
Province or State: CO
Postal Code: 80309-0449
Country: USA

Distribution

Distribution Media: FTP
Distribution Size: 51 KB
Distribution Format: Microsoft Excel

Distribution Media: FTP
Distribution Size: 1 KB
Distribution Format: ASCII Text (.txt)

Personnel

Todd A. Sowers
Role: INVESTIGATOR
Phone: 1 814 865-1921
Email: tas11@psu.edu
Contact Address:

  • Penn State University
  • Earth and Environment Science Institute
  • 317b Earth and Engineering Science Building

City: University Park
Province or State: PA
Postal Code: 16802
Country: USA

NSIDC User Services
Role: TECHNICAL CONTACT
Phone: 1 303 492-6199 x
Fax: 1 303 492-2468 x
Email: nsidc@nsidc.org
Contact Address:

  • National Snow and Ice Data Center
  • CIRES, 449 UCB
  • University of Colorado

City: Boulder
Province or State: CO
Postal Code: 80309-0449
Country: USA

Reference

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.

Metadata Name and Version

Metadata Name: CEOS IDN DIF
Metadata Version: 9.7

Creation and Review Dates

DIF Creation Date: 2011-01-01
Last DIF Revision Date: 2013-03-20

Metadata Views

DIF Text-Only

Directory Interchange Format (DIF) in plain text

DIF XML

Directory Interchange Format (DIF) in Extensible Markup Language (XML)

FGDC HTML

U.S. Federal Geographic Data Committee (FGDC) Content Standard for Digital Geospatial Metadata (CSDGM)

ISO HTML

International Organization for Standardization (ISO) 19115:2003 Geographic Information Metadata

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