Methane Isotopes from the WAIS Divide Ice CoreEntry ID: NSIDC-0435
Abstract: 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
Data Set Citation
Dataset Originator/Creator: Sowers, T. A.
Dataset Title: Methane Isotopes from the WAIS Divide Ice Core
Dataset Series Name: NSIDC-0435
Dataset Release Date: 2009-12-01
Dataset Release Place: Boulder, Colorado USA
Dataset Publisher: NSIDC: National Snow and Ice Data Center
Dataset DOI: doi:10.7265/N5J67DW0Online Resource: http://www.usap-dc.org/view/dataset/609435
Start Date: 2008-01-01Stop Date: 2008-12-30
Paleo Temporal Coverage
Paleo Start Date: 1000 ybp
Paleo Stop Date: present
Vertical Resolution: 0.1 meters
Temporal Resolution: 60 month
Data Set Progress
Distribution Media: FTP
Distribution Size: 32 KB
Distribution Format: Microsoft Excel
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.
Extended Metadata Properties
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Creation and Review Dates
DIF Creation Date: 2009-12-01
Last DIF Revision Date: 2017-08-24