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Methane Isotopes from the WAIS Divide Ice Core

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Entry ID

NSIDC-0435

Summary

This data set includes methane (CH4) isotope data from the West Antarctic Ice Sheet (WAIS) Divide ice core, WDC05A, in Antarctica. The data include depth, gas age, and the isotopic composition of methane (∂13C and ∂D of CH4). The ice core was collected during the 2005-2006 Antarctic field season. The CH4 isotope data was generated in 2008 using wet extraction methodology. Samples span the last 1,000 years, at a resolution of about 15 years. Data for samples above 69 meters were from firn air, and data below 69 meters from ice. The dating of the ice was based on continuous chemical analyses above 69 meters and Electrical Conductivity/Dielectric Property (ECM/DEP) measurements from ice. Dating uncertainty is estimated to be better than five years.

Data are available via FTP in Microsoft Excel (.xls) tab delimited format

Geographic Coverage

 

Spatial Coordinates:
N: -79.47°     S: -79.47°     E: 112.09°     W: 112.09°     Min Altitude: 1766 meters     Max Altitude: 1766 meters     Max Depth: 300 meters

Data Set Citation

Dataset Creator: Sowers, Todd
Dataset Title: Methane Isotopes from the WAIS Divide Ice Core
Dataset Release Date: 2009-12-01
Dataset Release Place: Boulder, Colorado USA
Dataset Publisher: NSIDC: National Snow and Ice Data Center
Online Resource: http://nsidc.org/data/nsidc-0435.html
Dataset DOI: http://dx.doi.org/10.7265/N5J67DW0

Temporal Coverage

Start Date: 2008-01-01
Stop Date: 2008-12-30

Paleo Temporal Coverage

Paleo Start Date: 1000 ybp
Paleo Stop Date: present
Chronostratigraphic Unit: Phanerozoic Cenozoic Cenozoic

Data Resolution

Vertical Resolution: 0.1 meters
Temporal Resolution: 5 years

Location Keywords

  • CONTINENT ANTARCTICA
  • GEOGRAPHIC REGION POLAR

Science Keywords

  • Cryosphere Glaciers/Ice Sheets Ice Sheets
  • Cryosphere Snow/Ice Snow/Ice Chemistry
  • Paleoclimate Ice Core Records Isotopes
  • Paleoclimate Ice Core Records Methane
  • Terrestrial Hydrosphere Snow/Ice Snow/Ice Chemistry

Ancillary Keywords

  • Firn Air Isotopes
  • Ice Sheet
  • West Antarctic Ice Sheet

ISO Topic Category (View Definitions)

  • Climatology/Meteorology/Atmosphere

Platform

  • FIELD INVESTIGATION
  • FIELD SURVEYS
  • LABORATORY

Instrument

  • MASS SPECTROMETERS
  • SPECTROMETERS

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: 32 KB
Distribution Format: Microsoft Excel

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

Related URL

VIEW PROJECT HOME PAGE
View Project Home Page

Reference

Mischler, J. A., T. A. Sowers, R. B. Alley, M. Battle, J. R. McConnell, L. Mitchell, T. Popp, E. Sofen, and M. K. Spencer. 2009. Carbon and hydrogen isotopic composition of methane over the last 1000 years, Global Biogeochem. Cycles, 23, GB4024, doi:10.1029/2009GB003460.

Sowers, T. 2006. Late Quaternary atmospheric CH4 isotope record suggests marine clathrates are stable. Science 311: 838-841.

Sowers, T., S. Bernard, O. Aballain, J. Chappellaz, J.-M. Barnola and T. Marik. 2005. Records of the d13C of atmospheric CH4 over the last two centuries as recorded in Antarctic snow and ice. Global Biogeochemical Cycles 19(GB2002).

Sowers, T. A. 2009. Atmospheric methane isotope records covering the Holocene period. Quaternary Science Reviews doi:10.1016/j.quascirev.2009.05.023.

Metadata Name and Version

Metadata Name: CEOS IDN DIF
Metadata Version: 9.7

Creation and Review Dates

DIF Creation Date: 2009-12-01
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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